1.Who took charge as the new Comptroller and Auditor General (CAG) of India in 2017?
A. Rajiv Mehrishi
B. Vivek Goenka
C. Ranjit Kumar
D. Achal Kumar Jyothi
Solutions
Rajiv Mehrishi took charge as the new Comptroller and Auditor General (CAG) of India in 2017 by succeeded Shashi Kant Sharma.
| Personalities | Positions |
| Vivek Goenka | Managing director of the India Express Limited. |
| Ranjit Kumar | Senior advocate in Supreme Court. |
| Achal Kumar Jyothi | 21st Chief Election Commissioner of India from 6 July 2017 to 23 January 2018. |
2. Biogas is produced from biomass by ________.
A. Destructive distillation
B. Anaerobic fermentation
C. Fractional distillation
D. Dry distillation
Solutions
Biogas is produced from biomass by Anaerobic fermentation.
| Biogas | Produced from raw organic materials such as agricultural waste, manure, plant material, sewage and food waste. |
| Destructive distillation | It is the process of separation of solid components from a mixture by heating in the absence of air. Examples: coal tar, coke, oils and gases. |
| Fractional distillation | It is the process of separation used to separate liquid mixtures based on the difference in boiling points. Examples: kerosene oil and separation of natural gas. |
| Dry distillation | It is the process of heating of solid materials to produce gaseous products. Examples: wood, oil shale and coal. |
3. A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. What is the reason behind this phenomenon?
A. Diffraction of light
B. Internal reflection of light
C. Refraction of light
D. Reflection of light
Solutions
CONCEPT:
- Refraction of Light: The bending of the ray of light passing from one medium to the other medium is called refraction.
- The refraction of light takes place on going from one medium to another because the speed of light is different in the two media.
- The greater the difference in the speeds of light in the two media, the greater will be the amount of refraction.
- A medium in which the speed of light is more is known as optically rarer medium and a medium in which the speed of light is less is known as an optically denser medium.
EXPLANATION:
- A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of the refraction of light. Therefore option 3rd is correct.
- Light is refracted as it passes from water into the air and as we know the refracted ray bends away from normal when it passes from denser to rarer medium.
- Water in a glass tumbler has a round outer surface that is convex and is a magnifying glass.
- As light is bent and being bent to the point that the object being observed appears to be larger than its normal size.
4. After 10 innings the average score per innings of a batsman was 52. After 12 innings the average rose to 54. If the batsman had scored 16 more runs in the 12th innings than in the previous one, how many runs did he score in the 11th innings?
A. 54
B. 56
C. 55
D. 53
Solutions
Given:
The average score after 10 innings = 52
The average score after 12 innings = 54
The Batsman scored 16 more runs in the 12th innings than the previous innings
Formula used:
Average = Sum of observations/Number of observations
Calculation:
Let the score of batsman in 11th innings be x
Let the score of batsman in 12th innings more than the previous innings be (x + 16)
The average score after 10 innings = (52 × 10) = 520
The average score after 12 innings = (54 × 12) = 648
According to the question
⇒ (520 + x + x + 16) = 648
⇒ (536 + 2x) = 648
⇒ 2x = (648 – 536)
⇒ 2x = 112
⇒ x = (112/2)
⇒ x = 56
∴ He scored 56 runs in his 11th innings.
5. Prostate gland is present below ________.
A. The kidneys
B. The scrotum
C. The urinary bladder
D. The penis
Solutions
The prostate gland is present below the urinary bladder.
The prostate gland in male helps to control urination from the bladder.
The prostate is a gland connected to the testicles at one end and the penis on the other end.
While ejaculation the prostate stores semen and makes fluid which liquefies it before it ejects out of the penis.
6. In the below series how many numbers are completely divisible by the number on right?
563248889266588343
A. 5
B. 4
C. 6
D. 3
Solutions
Calculation:
Pairs are 63, 88, 88, 66, 88
So, Total 5 numbers are there
∴ The required answer is 5.
7. Plasma is formed in the stars because of very _______________.
A. low pressure
B. high temperature
C. high pressure
D. low temperature
Solutions
The correct answer is high temperature.
Key Points
- Star: The celestial body which consists of a luminous sphere of plasma held together by its own gravitational field is called a star.
- The Stars are classified by their spectrum and their temperature
- Stars form a pattern in a group, which has a recognizable shape.
- This group of stars is called a constellation.
- At present, there are about 88 constellations.
- Each constellation has been given a name according to its shape.
- Some of the important constellations are Ursa Major, Ursa Minor, Orion, Leo Major, and Cassiopeia.
- The twinkling of a star is due to the atmospheric refraction of starlight.
- The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth.
- The atmospheric refraction occurs in a medium of gradually changing refractive index.
- Since the atmosphere bends starlight towards the normal, the apparent position of the star is slightly different from its actual position.
- When we rub a matchstick against the rough surface of a matchbox, then friction between the head of the matchstick and the rough side of the matchbox produces heat. This heat burns the chemicals present on the head of the matchstick due to which the matchstick lights up.
- A mirage is an optical phenomenon that creates the illusion of water and results from the refraction of light through a non-uniform medium.
- Mirages are most commonly observed on sunny days when driving down a roadway.
- As you drive down the roadway, there appears to be a puddle of water on the road several yards (maybe one hundred yards) in front of the car. Of course, when you arrive at the perceived location of the puddle, you recognize that the puddle is not there. Instead, the puddle of water appears to be another one-hundred yards in front of you.
8. The HCF of 20, 28 and 48 is:
A. 2
B. 8
C. 1
D. 4
Solutions
Given:
The numbers are 20, 28 and 48
Calculation:
Factors of 20, 28 and 48
20 = 2 × 2 × 5
28 = 2 × 2 × 7
48 = 2 × 2 × 12
Highest common factors is 2 × 2 = 4
∴ The HCF is 4.
9. Energy possessed by an object by its position or configuration is called ________.
A. Potential energy
B. Kinetic energy
C. Electrical energy
D. Nuclear energy
Solutions
- The energy possessed by an object by its position or configuration is called potential energy.
- Examples: climbing up on the chair and lifting heavy item to some height.
| Types of Energy | Description |
| Kinetic energy | It is energy due to the motion of an object. Examples: a car travelling down the road and an insect flying. |
| Electrical energy | It refers to energy that resulting from the flow of electric charge. Examples: transported materials and light bulb. |
| Nuclear energy | It is an energy that is derived from the nucleus of an atom and which contains neutron and proton. Examples: the nuclear power plant and a nuclear bomb. |
10. Consider the given argument and decide which of the given assumptions is (are) implicit.
Argument:
During an election, the opposition party said, “look at the price rise in the last five years”.
Assumptions:
1. This time give a chance to our party for power.
2. Prices will still rise if you choose the same party to be in power.
A. Only assumption 1 is implicit.
B. Only assumption 2 is implicit.
C. Both 1 and 2 are implicit.
D. Neither 1 nor is 2 implicit.
Solutions
The argument is about the opposition criticizing the government about increased prices. In assumption 1, pointing the failure of current government, opposition asking people for votes their party in upcoming elections and give their party a chance to come into power. So, assumption 1 is implicit. In assumption 2, the opposition party is trying to tell the disadvantage of choosing the party in the current government over them. So assumption 2 is implicit. Hence, both assumptions 1 and 2 are implicit.
11. 1st January 2018 was a Monday. Which of the following years will also start on a Monday?
A. 2022
B. 2023
C. 2020
D. 2024
Solutions
To repeat the same day on the same date of the same month there has to be a gap of years with 7 odd days.
In 2018 number of odd days = 1,
In 2019 number of odd days = 1,
In 2020 number of odd days = 2,
In 2021 number of odd days = 1,
In 2022 number of odd days = 1,
In 2023 number of odd days = 1
So, till 1st January 2024 number of odd days = 1 + 1 + 2 + 1 + 1 + 1 = 7
Thus, 1st January 2024 will be a Monday.
12. One of the roots of the equation x2 − 4x + k = 0 is x = 3. The other root is:
A. x = −1
B. x = −4
C. x = 4
D. x = 1
Solutions
Given:
The equation x2 − 4x + k = 0
Concept used:
Roots of a quadratic equation satisfy the equation, so by putting the value of one root, One can find the unknown variable and hence the other root.
Calculation:
Let us put x be 3 in the equation
So,
x2 – 4x + k = 0
⇒ 9 – 12 + k = 0
⇒ k = 3
Putting the value of k in the equation, we get:
x2 – 4x + 3 = 0
⇒ x2 – 3x – x + 3 = 0
⇒ x(x – 3) – 1(x – 3) = 0
⇒ (x – 3)(x – 1) = 0
⇒ x = 3 and 1
∴ The other root of the equation is 1.
13. Which component of the blood tansports food, CO2 and nitrogenous waste?
A. WBCs
B. Blood platelets
C. Plasma
D. RBCs
Solutions
- Plasma: The liquid component of blood which performs the function of transportation of food, carbon dioxide, nitrogenous waste.
- It transfers dissolved substances such as nutrients and electrolytes etc. It also carries blood components throughout the body.
| WBCs(White blood cell) | It protects the body against infection and disease. |
| Blood platelets | It helps to stop bleeding by clumping and clotting blood vessel injuries. |
| RBCs(Red blood cells) | It takes up oxygen from the lungs and circulates it around the body through the circulatory system. |
14. Which of the following causes damage to bridges, iron railings and all objects made of metals?
A. Corrosion
B. Rancidity
C. Acidity
D. Reduction
Solutions
- Corrosion causes damage to bridges, iron railings and all objects made of metals.
- Corrosion is a process where metals are attacked by moisture, acids etc.
- Corrosion is the black coating that develops on articles made of silver or the green coating on copper articles.
| Rancidity | It is the spoilage-of food where it becomes unsafe for consumption. Rancidity changes the food colour, odour and flavour. It occurs mostly for oils. |
| Acidity | It is caused by excess production of acid by the gastric glands of the stomach. |
| Reduction | It refers to the addition of electrons, which leads to a reduction in oxidation number of the atom. |
15. A pipe, working at full speed, can fill an empty cistern in 1 hour. However, during the first hour it worked at one-twelfth of its capacity, during the second hour at one-ninth of its capacity, during the third hour at one-sixth of its usual capacity, during the fourth hour at one- fourth of its usual capacity and during the fifth hour it was only one-third as efficient as it was supposed to be. A second pipe also displayed similar performance, but if it worked at full speed would have filled the empty cistern in 2 hours. Together with a drain pipe that drained water out of the tank at a constant rate, the empty cistern could be filled in 5 hours, all the three pipes working concurrently. How many hours will it take the drain pipe to empty the filled cistern if no other pipe was functioning during the time?
A. 10
B. 12
C. 16
D. 15
Solutions
Given:
Pipe 1 can fill the tank in 1 hour
Pipe 2 can fill the tank in 2 hours
Calculation:
Let the total work be 36x units
So, efficiency of Pipe 1 = 36x/1 = 36x units/h
Efficiency of pipe 2 = 36x/2 = 18x units/h
Let the efficiency of draining pipe be y
According to the question,
36x × (1/12) + 36x × (1/9) + 36x × (1/6) + 36x × (1/4) + 36x × (1/3) + 18x × (1/12) + 18x × (1/9) + 18x × (1/6) + 18x × (1/4) + 18x × (1/3) – 5y = 36x
⇒ 3x + 4x + 6x + 9x + 12x + 1.5x + 2x + 3x + 4.5x + 6x – 5y = 36x
⇒ 51x – 5y = 36x
⇒ 15x = 5y
⇒ y = 3x
So,, efficency of the draining pipe is 3x
So, required time = 36x/3x
⇒ 12 hours
∴ The required answer is 12.
16. What day would it be on 15th March 2020?
A. Saturday
B. Monday
C. Sunday
D. Tuesday
Solutions
Let’s find out the odd days,
15th March 2020 = (2019 + 1.1.2020 to 15.3.2020)
Odd days for 2000 years = 0
19 years = (4 leap years + 15 ordinary years) = (4 × 2) + (15 × 1) = 8 + 15 = 23 = 2 odd days.
Jan + Feb + Mar = 31 + 29 + 15 = 75 days = 5 odd days.
So, total number of odd days = 5 + 2 = 7 = 0 odd days.
So, the given day is Sunday.
17. In the following series, one letter is missing as shown by the question mark (?). Select the missing letter from the given options.E, J, O, T, ?
A. W
B. X
C. Y
D. Z
Solutions
The positions of the letters according to the English alphabet series:
The logic here is as follows,
E + 5 = J
J + 5 = O
O + 5 = T
T + 5 = Y
Thus the next letter in the given series is Y.
18. Who is the director of the film ‘Poorna’, which depicts the story of Poorna Malavath, the youngest girl to climb Mount Everest?
A. Rahul Bose
B. Anurag Kashyap
C. Gautham Vasudeva Menon
D. Ayan Mukherjee
Solutions
- Rahul Bose is the director of the film ‘Poorna’, which depicts the story of Poorna Malavath, the youngest girl to climb Mount Everest.
- The story is about a girl Poorna who belongs to Telugu speaking tribal family in Pakala, Nizamabad district in the Telangana state of India.
- She climbed the peak of Mount Everest at the age of 13 years and 11 months and becomes the youngest girl in the world.
- The film was broadcast at the 2017 Palm Springs International Film Festival where it got nominated on the festival’s list of 30 Best Feature Films.
- The starring cast of the film is Aditi Inamdar, S. Maria, Harsha Vardhan and Rahul Bose.
- The film released in India on 31 March 2017 in Hindi, English and Telugu languages.
19. The speed of sound in air at 0°C is________.
A. 330 ms
B. 330 ms-1
C. 331 ms
D. 331ms-1
Solutions
The speed of sound in air at 0°C is 331ms-1 or around 1200 km per hour.
Speed of sound (m/s) = 331 + 0.60 T(°C)
Hence, the speed of sound in air at 0°C is 331ms-1.
20. Select the option that depicts the correct mirror image for the given word.
A. 
B. 
C. 
D. 
Solutions
Thus, the mirror image of the given word SMILE is image at option 4.
21. ‘Freedom Trail’ is a 2.5 mile long passage that offers a rich insight into the American Revolution. In which US city you would find this famous and historic trail?
A. Denver
B. Connecticut
C. Memphis
D. Boston
Solutions
- The ‘Freedom Trail’ is a 2.5-mile long passage that offers a rich insight into the American Revolution. We can find this US city in Boston.
- The ‘Freedom Trail’ starts from Boston Common (America’s oldest public park) and ends at the USS Constitution in the Charlestown Navy Yard.
- The Freedom Trail is designed with red bricks and it passes through sixteen places which are important to the history of America.
22. In a cricket match, the scores of the players are considered such that coefficient of variation of scores is 16 and mean is 25 .then the variance is:
A. 4
B. 16
C. 8
D. 12
Solutions
Given:
Mean = (μ) = 25
coefficient of variation (CV) = 16
Formula used:
Standard deviation = σ = √variance
CV = (σ/μ) × 100
CV = Coefficient of variation = σ/μ
σ = Standard deviation
μ = Mean
Calculation:
CV = (σ/μ) × 100
⇒ 16 = (σ/25) × 100
⇒ 16 = 4σ
⇒ σ = 4
So, σ = √variance
⇒ 4 = √variance
⇒ 16 = variance
∴ The required answer is 16.
23. Select the odd figure out of the given series.
A. 4
B. 5
C. 3
D. 2
Solutions
All the figures except 5th one has one curve in it.
Hence 5th figure is the odd one.
24. Select the option that depicts the following transparent sheet (Problem Figure) when folded at the dotted line shown.
A. D
B. C
C. A
D. B
Solutions
Thus, the image that is formed after folding the paper is image D.
25. Choose the correct picture which follows:
A. C
B. B
C. D
D. A
Solutions
The second image is the mirror image of the first image.
Thus the answer is image C.
26. How many triangles are present in the below figure?
A. 18
B. 17
C. 19
D. 16
Solutions
The triangles in the figure are:
1. ΔABH
2. ΔACG
3. ΔADF
4. ΔBEH
5. ΔBCE
6. ΔGHI
7. ΔEGH
8. ΔBCJ
9. ΔCEJ
10. ΔEIJ
11. ΔEGI
12. ΔEGJ
13. ΔCEI
14. ΔCEG
15. ΔEFH
16. ΔBDE
17. ΔCDE
18. ΔEFG
∴ There are 18 triangles in the figure
27.
Based on the given data, determine the bikes of which colours will make a total sales of 55%?
A. Brown, black, blue and golden
B. Brown, black, red and golden
C. Blue, green, gold, black and red
D. Green, silver, blue and red
Solutions
Calculation:
Option 1:
Brown + black + blue + golden = 3 + 5 + 12 + 10
⇒ 30%
Option 2:
Brown + black + red + golden = 3 + 5 + 20 + 10
⇒ 38%
Option 3:
Blue + green + gold + black + red = 12 + 8 + 10 + 5 + 20
⇒ 55%
Option 4:
Green + silver + blue + red = 8 + 7 + 12 + 20
⇒ 47%
∴ The required answer is Option 3.
28.
The given chart represents the sales of different companies in the year 1999 and 1998.
If the total sales in 1998 was 7890, which increased by 16.5% in 1999, then the total sales in the year 1999 is approximately _______.
A. 9119
B. 9911
C. 1919
D. 9191
Solutions
Calculation:
Total sales in 1999 = 7890 + 7890 × 16.5%
⇒ 7890 + 1301.85
⇒ 9191.85 ≈ 9191
∴ The required answer is 9191.
29. Thirty men can do a piece of work in 16 days working 8 hrs a day. How many men are needed to complete another work, which is twice the first one, in 10 days working 12 hrs a day?
The following are the steps involved in solving the above problem. Arrange them in sequential order.
D) M2 = 64
A. ACBD
B. ABCD
C. BACD
D. CBAD
Solutions
Given:
Thirty men can do a piece of work in 16 days working 8 hrs a day.
Concept used:
Here,
M1 = Number of men assigned for work1
D1 = Number of days taken to complete the work1
H1 = Number of hours taken to complete the work1
W1 = work1
M2 = Number of men assigned for work2
D2 = Number of days taken to complete the work2
H2 = Number of hours taken to complete the work2
W2 = work2
Calculation:
Let the 1st work be of x units
So, 2nd work = 2x units
Now,
⇒ M2 = 64
From this, we can say the sequent is CBAD
∴ The required answer is CBAD.
30. Shrenik switched on a bulb at 2:39:40 hours and switched it off on the same day at 12:30:34 hours. For how long was the bulb in switched-on mode?
A. 09 hours 50 minutes 54 seconds
B. 12 hours 40 minutes 06 seconds
C. 09 hours 09 minutes 06 seconds
D. 10 hours 09 minutes 06 seconds
Solutions
Calculation:
From 2:39:40 to 12hrs total time = 9hours 20 min and 20 sec
Now,
From 12 hrs to 12:30:34 total time = 30 min 34 sec
So, Total time = 9hours 20 min 20 sec + 30 min 34 sec
⇒ 09 hours 50 minutes 54 seconds
∴ The required answer is 09 hours 50 minutes 54 seconds.
31. Who is the author of the Indian English Novel ‘Sita: Warrior of Mithila’ published in 2017?
A. Amish Tripathi
B. Rahul Mehta
C. Chetan Bhagat
D. Robin Sharma
Solutions
- Amish Tripathi is the author of the Indian English Novel ‘Sita: Warrior of Mithila’ published in 2017.
- The book is based on the epic Ramayana and the story of Hindu goddess Sita.
- Author has transformed Indian Fiction with a unique combination of mystery, mythology, religious symbolism and philosophy.
- It is the second book of the Ram Chandra Series of Amish Tripathi published in the English language.
32. Which of the following is NOT a characteristic of dicotyledons plants?
A. These plants have 2 cotyledons
B. These plants have fibrous roots
C. These plants have reticulate venation
D. These plants have a tap root
Solutions
- Fibrous roots is not a characteristic of dicotyledons plants.
- Its roots develop from radicle and the seed has two cotyledons or embryonic leaves.
- Their leaves have reticulate venation and have a pentamerous and tetramerous flower.
- Examples: mustard, bitter gourd, watermelon, brinjal, apple, mango, tamarind etc.
33. Which Indian industrialist was recently elected as the Chairman of the International Chamber of Commerce (ICC)?
A. Mukesh Ambani
B. Lakshmi Mittal
C. Anil Ambani
D. Sunil Mittal
Solutions
- Sunil Mittal was recently elected as the Chairman of the International Chamber of Commerce (ICC).
- He is the founder and Chairman of Bharti Airtel Enterprises.
- He was awarded the Padma Bhushan in 2007.
| Mukesh Ambani | Managing director of Reliance Industries Limited. |
| Lakshmi Mittal | Chairman and CEO of Arcelor Mittal. |
| Anil Ambani | Chairman of Reliance Group. |
34. Consider the given question and decide which of the following statements is sufficient to answer the question.
What is the colour of the granite in the kitchen?
Statements:
1. The colour of the granite is the colour of the wall.
2. The colour of the granite is very bright.
A. 2 alone is sufficient while 1 alone is not sufficient to answer the given question.
B. Both 1 and 2 are sufficient to answer the given question.
C. 1 alone is sufficient while 2 alone is not sufficient to answer the given question.
D. Neither 1 nor 2 is sufficient to answer the given question.
Solutions
Statement 1 compares the colour of the wall with the colour of granite. Statement 2 states the nature of the colour of granite. As none of the provided statements definitely quote the colour of granite neither statement 1 nor 2 is sufficient to answer the given question.
35. A rocket is launched to travel vertically upward with a constant velocity of 20 m/s. After travelling for 35 seconds, the rocket develops a snag and its fuel supply is cut off. The rocket then travels like a free body. The height achieved by it is:
A. 700 m
B. 800 m
C. 680 m
D. 720 m
Solutions
Given:
A rocket is launched to travel vertically upward with a constant velocity of 20 m/s.
Concept used:
we know that S = ut
when it is moving at a constant velocity.
Calculation:
After 35 seconds the distance will be = S = 20 × 35
⇒ 700 m
Now from 700 m above the ground now it travels in a free fall.
The initial velocity = 20 m/s
Final velocity = 0
Acceleration due to gravity = 10
Now,
V2 = U2 – 2gs
⇒ 0 = 400 – 20S
⇒ 20s = 400
⇒ S = 400/20
⇒ S = 20 m
The total height achieved = 700 + 20 = 720 m
∴ The required answer is 720 m.
36.
| Student/Subject | P | C | B | M |
| W | 70 | 90 | 50 | 85 |
| X | 55 | 80 | 95 | 60 |
| Y | 60 | 20 | 90 | 40 |
| Z | 90 | 80 | 40 | 65 |
The given table represents the marks obtained by four students W, X, Y and Z in four subjects P, C, B and M, with the maximum marks in each subject being 100.
The average marks of the four students in P and C together (round to one decimal) is:
A. 68.3
B. 136.2
C. 68.2
D. 69
Solutions
Calculation:
Total marks of W in P and C = 70 + 90 = 160
Total marks of X in P and C = 55 + 80 = 135
Total marks of Y in P and C = 60 + 20 = 80
Total marks of Z in P and C = 90 + 80 = 170
So, Average marks of the four students in P and C = (160 + 135 + 80 + 170)/4
⇒ 545/4
⇒ 136.25 ≈ 136.2
∴ The required answer is 136.2.
37. What is the name the Russian chemist who stated that the properties of elements are a periodic function of their atomic masses?
A. Mendeleev
B. Markovnikov
C. Zelinsky
D. Zaitsev
Solutions
The correct answer is Mendeleev.
CONCEPT:
- Dmitri Mendeleev, the Russian chemist formulated a periodic law which states that the properties of elements are a periodic function of their atomic masses.
EXPLANATION:
- Mendeleev was the most important contributor to the early development of the Periodic table.
- He categorised 63 elements on the basis of their physical and chemical properties in the increasing order of the atomic masses.
- Mendeleev’s periodic table was based on the mass number. This relation is known as “periodic law”.
Additional Information
- Mendeleev’s periodic table contains vertical columns called groups and horizontal rows called periods.
- He placed elements having similar properties in the same group. For example, Cobalt (atomic mass 58.9) was placed before nickel (atomic mass 58.7).
- He predicted the existence of certain elements that had not been discovered at that time and named them as Eka-Carbon, Eka-Aluminium, Eka-Silicon.
38. Which among the following compounds has a double bond?
A. Ethane
B. Methane
C. Acetylene
D. Ethylene
Solutions
Ethylene has a double bond because it consists of two carbon atoms that are double-bonded to each other. Its chemical formula is C2H4.
| Compound Name | Description | Chemical Formula |
| Ethane | Organic hydrocarbon compound which is colourless and odourless at standard temperature conditions | C2H6 |
| Methane | It is a colourless and odourless gas, burns with a bluish flame and produces water vapour, carbon dioxide, and energy. | CH4 |
| Ethylene | It is an organic compound with two carbons bonded by a double bond and two hydrogens bonded to each carbon. | C2H4 |
39. Which of the following scientists had done some calculations for the fifth state of matter?
A. CV Raman
B. Satyendra Nath Bose
C. Vikram Sarabhai
D. Homi Bhabha
Solutions
Satyendra Nath Bose is associated with research related to the fifth state of matter.
Along with Albert Einstein, Satyendranath Bose did calculations for the fifth state of matter and named it “The Bose-Einstein Condensate”.
If atoms of plasma are extremely hot with extremely excited particles, atoms in a Bose-Einstein condensate are totally opposite. They are very cold and unexcited atoms, occurs at very low temperatures.
40. What is the name of the reddish brown gas evolved when Lead Nitrate is heated strongly?
A. Nitrogen dioxide
B. Nitrogen pentoxide
C. Dinitrogen Oxide
D. Nitric Oxide
Solutions
- Nitrogen dioxide is the reddish brown gas evolved when Lead Nitrate is heated strongly.
- Lead nitrate on heating decomposes to lead monoxide, nitrogen dioxide and oxygen.
- 2Pb(NO3)2 = 2PbO + 4NO2 + O2.
- NO2(Nitrogen dioxide) is released, along with oxygen, as a reddish-brown gas.
| Compound Name | Chemical Formula |
| Nitrogen dioxide | NO2 |
| Nitrogen pentoxide | N2O5 |
| Dinitrogen Oxide | N2O |
| Nitric Oxide | NO |
41. The LCM of the three numbers 16, 28 and 42 is:
A. 2
B. 168
C. 252
D. 336
Solutions
Given:
The numbers are 16, 28 and 42
Calculation:
LCM of 16, 28 and 42
Factorize all three numbers we get
16 = 2 × 2 × 2 × 2
28 = 2 × 2 × 7
42 = 2 × 3 × 7
LCM = 2 × 2 × 2 × 2 × 3 × 7
LCM = 336
∴ The LCM is 336.
42. A person bought an item for Rs. 1,500 and sold it at a profit of 12%. What was the selling price of the item?
A. Rs. 1,620
B. Rs. 1,680
C. Rs. 1,800
D. Rs. 1,662
Solutions
Given:
A person bought an item for Rs. 1,500 and sold it at a profit of 12%
Concept used:
Selling price = Cost price + Cost price × Profit%
Calculation:
Selling price = 1500 + 1500 × 12%
⇒ Selling price = 1500 + 180
⇒ Selling price = 1680
∴ The selling price of the item is Rs. 1680.
43. Complete the series given in the Problem Figure with an appropriate option from the Answer Figures.
A. 1
B. 3
C. 2
D. 4
Solutions
The problem figure is first mirrored and then made upside down.
Thus the 3rd image is the answer image.
44. Consider the given statements as true and decide which of the given conclusions can definitely be drawn from the given statements.
Statement:
All studious students pass in exams. All studious students sleep well.
Conclusions:
1. All who sleep well are studious students.
2. All who pass in exams sleep well.
A. Neither 1 nor 2 follows.
B. Only conclusion 2 follows.
C. Both 1 and 2 follow.
D. Only conclusion 1 follows.
Solutions
The statement only gives information about studious students.
Therefore, it is not possible to conclude about those who sleep well and those who pass in exams do not follow.
45. The angle of elevation of the top of a hill at the foot of the tower is 60° and the angle of elevation of the top of the tower from the foot of the hill is 30°. If the tower is 50 m high, what is the height of the hill?
A. 180 m
B. 120 m
C. 100 m
D. 150 m
Solutions
Given:
The height of the tower is 50 m
The angle of elevation of the top of a hill at the foot of the tower is 60°
The angle of elevation of the top of the tower from the foot of the hill is 30°
Concept used:
In ΔBAC
cot 30° = AC/50
⇒ √3 = AC/50
⇒ AC = 50√3 Tower B E 50 < 60 deg A
In ΔACD,
tan 60° = (CD)/(50√3)
⇒ √3 = (CD)/(50√3)
⇒ CD = (50√3) × √3
⇒ CD = 150m
So, height of the hill = CD = 150 m
∴ The required answer is 150 m
46. Which one of the following females athletes is not a squash player?
A. Koneru Humpy
B. Joshna Chinnappa
C. Dipika Pallikal
D. Anaka Alankamony
Solutions
- Koneru Humpy is not a squash player.
- Koneru Humpy is an Indian chess grandmaster and hails from Gudivada, Andhra Pradesh.
- She won three gold medals at the World Youth Chess Championship in 1997, 1998 and 2000 under -10, 12 and 14 girls’ division respectively.
- She became the second female player, after Judit Polgár, to exceed the 2600 Elo rating mark, being rated 2606 in October 2007.
47. The embryo gets nutrition from the mother’s blood with the help of a special tissue called ________.
A. Placenta
B. Uterus
C. Fallopian tube
D. Cervix
Solutions
- The embryo gets nutrition from the mother’s blood through the placenta.
- The placenta provides oxygen and nutrients to the baby and removes carbon dioxide and other waste products.
- The placenta connects the growing baby’s umbilical cord to the mother by attaching itself to the inner wall of the womb.
48. What is the full form of GST?
A. Grand Sales Tax
B. Goods Sales Tax
C. General Sales Tax
D. Good and Services Tax
Solutions
The full form of GST is Good and Services Tax.
GST was introduced by Finance Minister Arun Jaitley on 1st July 2017 under Prime Minister Narendra Modi’s Government.
It is the destination-based tax, paid by the consumers of goods and services and collected and forwarded to the Government by the business entities.
49. If the kinetic energy of a body becomes 256 times its initial value, then the new linear momentum will be:
A. The same as the initial value
B. 8 times the initial value
C. 16 times the initial value
D. 32 times the initial value
Solutions
The kinetic energy of the body becomes 256 times its initial value.
Let initial kinetic energy is E
Final kinetic energy is 256E
P= Linear Momentum
Now, P = √2mE,
Then,
P2/P1 = (√2mE2)/( √ 2mE1)
P2 = P x (√2mE2)/(√ 2mE1) = P √E2/ √E1
So, P √ (256E / E) = 16 P
Hence, final linear momentum is 16 times of its initial value.
50. What is the time taken by a 180 m long train running at 54 km/h to cross a man standing on a platform?
A. 12 sec
B. 10 sec
C. 13 sec
D. 11 sec
Solutions
Given:
Length of the train = 180 m
Speed of the train = 54 km/h
Concept used:
Speed = Distance/time
When a train crosses a man standing on a platform then it will cover its own length
Speed in m/sec = km/h × 5/18
Calculation:
Speed in m/sec = 54 × (5/18)
⇒ 15 m/sec
Now,
Time = 180/15
⇒ 12 sec
∴ The required time is 12 sec.
51. Adithya got 78% marks in the examination. If he secured 663 marks, find the maximum marks.
A. 700
B. 800
C. 750
D. 850
Solutions
Given:
Adithya got 78% marks in the examination.
He secured 663 marks
Calculation:
Let the maximum marks be x
According to the question,
x × 78% = 663
⇒ x = 663 × (100/78)
⇒ x = 850
∴ The maximum mark is 850.
52. In a bag the ratio of red balls to green balls is 4 ∶ 9. If 6 more green balls were added to the bag, the ratio of red balls to green balls would become 1 ∶ 3. How many red balls are there in the bag?
A. 8
B. 9
C. 12
D. 10
Solutions
Given:
Ratio of red ball to green balls = 4 : 9
Calculation:
Let the number of red and green balls be 4x and 9x
Now,
(4x)/(9x + 6) = 1/3
12x = 9x + 6
⇒ 3x = 6
⇒ x = 2
So, number of red balls in the bag = 4 × 2
⇒ 8
∴ There are 8 red balls in the bag.
53. ‘Car’ is related to ‘Garage’ in the same way as ‘Hen’ is related to ________.
A. Kennel
B. Coop
C. Stable
D. Shed
Solutions
Garage is the place where Cars are kept safe similarly Coop is the place where Hens can live securely.
Hence Hens are related to Coop.
54. Some books are arranged one above the other. If a book is at 18th position from top and 5th position from bottom then the total number of books is:
A. 21
B. 20
C. 22
D. 23
Solutions
Formula used:
Total = [{(The position from the top) + (The position from the bottom)} – 1]
Calculation:
Total = [(18 + 5) – 1]
⇒ [23 – 1]
⇒ 22
∴ The correct answer is 22.
55. Select the related word from the given alternatives:
Transport : Goods ∷ Banks : ________
A. Pounds
B. Money
C. Rupees
D. Dollar
Solutions
Transport deals with the exchange of goods while banks deal with the exchange of money.
In the given options, all are currencies of different countries except Money.
Thus Bank is related to Money.
56. Select the option that will fit in the blank space in the given figure series.
A. 
B. 
C. 
D. 
Solutions
Here the line along with the dots is rotating in clockwise direction along the sides of the square.
The complete sequence of figure is as follows:
Thus, the answer is image at option 1.
57. The given symbol stands for a/an _________ in an electric circuit.
A. plug key
B. electric bulb
C. resistor
D. battery
Solutions
The correct answer is electric bulb.
Key Points
- Electric bulb
- An electric bulb is connected to the circuit.
- It glows as the current passes through the circuit.
- However, it cannot detect very small currents.
Additional Information
- Tungsten: The metal tungsten is used for the filaments in bulbs. It has a high melting point and retains its strength when heated.
- Filaments of the light bulbs are made up of the Tungsten element.
- Its symbol is ‘W’ because of its scientific name ‘Wolfram’ and its atomic number is 74.
- Properties of filament:
- It should have a very high melting point.
- It should not burn at room temperature.
- It should have high resistivity.
- If the resistance is less, heat energy is produced is very low which is not sufficient for an electric bulb to glow so the resistance is kept high.
58. Select the odd character out of the following series.
A. 4
B. 1
C. 3
D. 2
Solutions
O, U, E & I are vowels whereas T is the consonant
Hence image at number 4 is odd one out.
59. Which of the following is an unsaturated hydrocarbon?
A. Ethyne
B. Propane
C. Butane
D. Pentane
Solutions
- Ethyne is an unsaturated hydrocarbon.
- Unsaturated hydrocarbons have double or triple bonds between the carbon atoms.
- Ethyne belongs to group Alkyne. It has two carbon atoms and two hydrogen atoms and its chemical formula is C2H2.
Note: Free valence electrons = Unsaturated.
No free valence electrons = Saturated.
| Compound Name | Chemical formula |
| Propane | C3H8 |
| Butane | C4H10 |
| Pentane | C5H12 |
60. 30% of a number is 33. What is the number?
A. 105
B. 120
C. 110
D. 115
Solutions
Given:
30% of a number is 33.
Calculation:
Let the number be x
According to the question,
30% × x = 33
⇒ x = 33 × 10/3
⇒ x = 110
∴ The number is 110.
61. In a certain code, if MIZZLY is written as ZIMYLZ and PUZZLE is written as ZUPELZ, then what will BUZZWORD be written as in the same code?
A. ZZUBDROW
B. BUZZDROW
C. DROWZZUB
D. WORDBUZZ
Solutions
Logic for the code word of MIZZY and PUZZLE is,
Thus, BUZZWORD will be coded as ZZUBDROW.
62. Which of the following numbers is not composite?
A. 203
B. 109
C. 209
D. 161
Solutions
Calculation:
A composite number is a positive integer which is not prime (i.e., which has factors other than 1 and itself).
Prime Factors of 203 = 7 × 29
Prime Factors of 109 = 1 × 109
Prime factors of 209 = 11 × 19
Prime factors of 161 = 7 × 23
∴ 109 is not composite as it does not have factors other than 1 and itself.
63. Read the given question and decide which of the following argument is/are strong.
Are stock markets sources of wealth creation?
Arguments:
1. Yes, money multiplies in stock markets.
2. No, investments in stock markets are subjected to market risk.
A. Only argument 1 is strong
B. Only argument 2 is strong
C. Neither argument 1 nor 2 is strong.
D. Both argument 1 and 2 are strong.
Solutions
A handsome amount of money can be earned through the stock market by multiplying our investments depending on various other factors. Thus, argument 1 follows.
As market risks are associated with equity investment, changes in interest rate, foreign exchange fluctuations, etc, therefore, investments in stock markets are subject to market risk.
Hence, arguments 2 also follows.
The correct answer is option 4, Both argument 1 and 2 are strong.
64. The square root of 5776 is:
A. 84
B 66
C. 76
D. 64
Solutions
Given:
Number is 5776
Calculation:
Using long division method, we get
∴ The square root of 5776 will be 76.
Shortcut TrickUnit digit of 5776 = 6
∵ We know that unit digit of 42, 62 = 6
The square root must be a number whose unit digit will be 6.
Now, we know that 702 = 4900 and 802 = 6400
So, the required answer must be greater than 70 and lesser than 80.
∴ The square root of 5776 will be 76.
65. A fraction, when taken away from 1/3 gives 1/12 The fraction is:
A. 3/4
B. 1/4
C. 5/12
D. 1/9
Solutions
Given:
A fraction, when taken away from 1/3 gives 1/12.
Calculation:
Let the fraction be x.
According to the question,
1/3 – x = 1/12
⇒ x = 1/3 – 1/12
⇒ 3/12
⇒ 1/4
∴ The fraction is 1/4.
66. If 3/4 of the weight of a brick is 7/8 kg, then 5/7 of the weight of the brick will be:
A. 20/21 kg
B. 5/8 kg
C. 5/6 kg
D. 15/32 kg
Solutions
Given:
3/4 of the weight of a brick is 7/8 kg
Calculation:
Let weight of the brick be x kg.
According to the question,
3/4 × x = 7/8
⇒ x = 7/6
So, Weight of 5/7 of the brick = 7/6 × 5/7 = 5/6 kg
∴ 5/7 of the weight of the brick will be 5/6 kg.
67. An Odometer is an instrument used to measure ________ in automobiles.
A. Speed
B. Odour
C. Direction
D. Distance
Solutions
CONCEPT
- Odometer or odograph: It is a device used to measure the distance travelled by the vehicle.
- Speedometer or speed meter: A device used by the vehicle to measure the speed of the vehicle.
- Compass: A magnetic device used to find direction on the earth.
EXPLANATION
- As explained above odometer is used to measure the distance in automobiles. Therefore option 4 is correct.
68. Select the odd one out from the given series.
a – Tortoise, b – Crab, c – Frog, d – Fish
A. d
B. b
C. a
D. c
Solutions
Tortoise, Crab and Frog are different types of animals.
Fish is one of the five main vertebrate groups.
Hence d – Fish is the odd one out.
Additional Information
The five main vertebrate groups alive today are the fishes, amphibians, reptiles, birds, and mammals.
69. If the letters in the word ‘UNIVERSAL’ are arranged in the alphabetic order and each letter in the order is assigned a numerical value of 1, 2, 3 …. according to their position from the left, then the sum of the numerical values of the position of the consonants will be:
A. 31
B. 28
C. 30
D. 32
Solutions
| U | N | I | V | E | R | S | A | L |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Arranging in Alphabetical order
| A | E | I | L | N | R | S | U | V |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
Thus the numerical values of the position of the consonants are:
4 + 5 + 6 + 7 + 9 = 31
70. Which is the first metallic element in the Modern Periodic Table?
A. He
B. H2
C. Na
D. Li
Solutions
Li (Lithium) is the first metallic element in the Modern Periodic Table.
| Element | Symbol | Atomic Number |
| Helium | He | 2 |
| Hydrogen | H2 | 1 |
| Sodium | Na | 11 |
| Lithium | Li | 3 |
71. Where was the 2017 World Rapid Fire Chess Championship played, in which Viswanathan Anand regained his title?
A. Chennai
B. Oslo
C. Dubai
D. Riyadh
Solutions
The 2017 World Rapid Fire Chess Championship played in Riyadh, Saudi Arabia, in which Viswanathan Anand retained his title.
He defeated Russia’s Vladimir Fedoseev by 2-0 score to reclaim the title he had won in 2003 in the final tie-breaker mini-match.
He was awarded Rajiv Gandhi Khel Ratna Award in 1991 and Padma Vibhushan Award in 2007.
72. Consider the given statements to be true and decide which of the conclusions logically follow(s) from the statements.
Statements:
There is an increase in the price of essential commodities due to a strike by the transporters.
Conclusions:
1. The government should buy their own vehicles to transport essential goods.
2. The government should negotiate with transporters to withdraw the strike.
A. Both 1 and 2 follow.
B. Only conclusion 1 follow.
C. Neither 1 nor 2 follows.
D. Only conclusion 2 follows.
Solutions
The statement tells the effect of the strike by the transporters.
In conclusion 1, if the government buys vehicles and starts the transport, the price of commodities will come to normal state. But the strike of the transporters is not going to stop, which is not good. So, conclusion 1 does not follow. In conclusion 2, the government is negotiating with transporters and trying to stop the strike because of which the price of commodities will come to normal and the effects of the continuation of the strike will not be there. So, conclusion 2 follows.
73. When was India’s capital shifted from Calcutta to Delhi?
A. 1912
B. 1905
C. 1910
D. 1911
Solutions
- India’s capital shifted from Calcutta to Delhi in the year 1911.
- Calcutta had become the centre of the nationalist movements since the nineteenth century led to the Partition of Bengal by then Viceroy of British India Lord Curzon.
- This generated political and religious extend including political eliminations of British officials in Calcutta.
- Calcutta was situated in the eastern coastal part of India whereas Delhi was located in the northern part.
- The British Government of India thought that Delhi was easier and more convenient to rule.
74. Who is the Chief Minister of Kerala as of February 2018?
A. Pinarayi Vijayan
B. Oommen Chandy
C. AK Antony
D. VS Achuthanandan
Solutions
As of February 2018, Pinarayi Vijayan is the Chief Minister of Kerala since 26 May 2016.
| Person | Information |
| Oommen Chandy | He was the former Chief Minister of Kerela from 2004 to 2006. |
| AK Antony | He served as Defence Minister of India and has also been three times as Chief Minister of the state of Kerala. |
| VS Achuthanandan | He was the former Chief Minister of Kerela from 2006-2011 |
75. According to the given Venn diagram, the total number of students who play “cricket as well as football” and also “all the 3 games” is: ________.
A. S
B. S + Q
C. S + V
D. Q + V
Solutions
From the figure,
Total number of students who play cricket as well as football = V
Total number of students who play all the 3 games = S
So, the total number of students who play “cricket as well as football” and also “all the 3 games” = S + V.
