Explore topic-wise MCQs in Mental Ability.

This section includes 49 Mcqs, each offering curated multiple-choice questions to sharpen your Mental Ability knowledge and support exam preparation. Choose a topic below to get started.

1.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_  Assertion (A) :  Clothes are not washed properly in hard water. _x005F_x000D_  Reason (A)    :  Hard water contains many minerals.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
2.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_  Assertion (A) : We feel colder on mountains than on plains._x005F_x000D_  Reason (R)    : Temperature decreases with altitude.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
3.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)   :   Tamil Nadu gets most of the rainfall in winter. _x005F_x000D_ Reason (R)     :   Tamil Nadu gets rainfall from retreating monsoons.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
4.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)   :    An iron ball floats on mercury but gets immersed in water. _x005F_x000D_ Reason (R)     :   The specific gravity of iron is more than that of mercury.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
5.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)    :    Increase in carbon dioxide would melt polar ice. _x005F_x000D_ Reason (R)      :    Global temperature would rise

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
6.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)  : Graphite is slippery and used as a lubricant. _x005F_x000D_ Reason (R)    : Graphite has free electrons.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
7.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)   :   When common salt is kept open, it absorbs moisture from the air. _x005F_x000D_ Reason (R)     :   Common salt contains magnesium chloride.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
8.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A) :  The steam engine was invented by James Watt. _x005F_x000D_ Reason (R)   :  There was a problem of taking out water from flooded mines

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
9.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A)   :   In India, the judiciary is independent of the executive. _x005F_x000D_ Reason (R)     :   Judiciary favours the government and helps in the implementation of its plans.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
10.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A) :  A little gap is left between iron rails. _x005F_x000D_ Reason (R)   :  Iron expands in summer.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
11.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :  Eskimos reside in igloos. _x005F_x000D_ Reason (R)     :  No other material except snow is available.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
12.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion(A) :  Bangladesh imports jute from India. _x005F_x000D_ Reason (R)   :  Bangladesh has most of the jute mills.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.
Answer» E.
Discussion
13.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :  Pluto is the coldest planet _x005F_x000D_ Reason (R)     :  It receives slanting rays of- the sun.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
14.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :  Pressure cookers are fitted with ebonite handles. _x005F_x000D_ Reason (R)     :  Ebonite is strong.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
15.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :  Diamond is used for cutting glass. _x005F_x000D_ Reason (R)     :  Diamond has a high refractive index.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
16.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)   :   Simla is colder than Delhi. _x005F_x000D_ Reason (R)      :  Simla is at a higher altitude as compared to Delhi.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
17.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :    Leakages in household gas cylinders can be detected. _x005F_x000D_ Reason (R)     :    LPG has a strong smell.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
18.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)   :   Most of the Himalayan rivers are perennial. _x005F_x000D_ Reason (R)      :   They are fed by melting snow.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
19.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :   We feel comfortable in hot and humid climate. _x005F_x000D_ Reason (R)     :   Sweat evaporates faster in humid climate.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.
Answer» E.
Discussion
20.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :   Mohammad-bin-Tughluq is called the 'wisest fool'. _x005F_x000D_ Reason (R)     :   He had wise plans but implemented them foolishly.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
21.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)   :  We prefer to wear white clothes in winter. _x005F_x000D_ Reason (R)      :  White clothes are good reflectors of heat.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» E.
Discussion
22.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :  a Leaves of plants are green. _x005F_x000D_ Reason (R)    :   Plants contain chromoplasts, the green pigment.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
23.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)   :   Weeds should not be allowed to grow along with the crops. _x005F_x000D_ Reason (R)     :    Weeds leave no space for plants to grow.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
24.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : Carbon dioxide turns lime water milky. _x005F_x000D_ Reason (R)     : Carbon dioxide sullies the water.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
25.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Himalayas once laid under the sea. _x005F_x000D_ Reason (R)    : Fossils of marine creatures are traced on the Himalayas.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
26.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : Cotton is grown in alluvial soils. _x005F_x000D_ Reason (R)    :  Alluvial soils are very fertile.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
27.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  :   Red colour of blood is due to haemoglobin. _x005F_x000D_ Reason (R)     :  Haemoglobin is a red pigment.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
28.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) :  Gandhiji withdrew the non-cooperation movement _x005F_x000D_ Reason (R)    :  There was violence at the Chauri Chaura outrage

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
29.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : There is no vaccine for AIDS. _x005F_x000D_  Resson (R)   : The AIDS virus changes its genetic code

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
30.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : Shivaji developed the guerilla warfare. _x005F_x000D_  Reason (R)    : Shivaji feared the Mughals.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
31.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) :  Glass tumbler breaks in winter when hot water is poured in it._x005F_x000D_ Reason (R)    :  When hot water is poured. the outer surface of glass expands.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
32.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : a Vaccines prevent diseases. _x005F_x000D_ Reason (R)    : Vaccines must be given to children.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
33.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : In India, females have higher life expectancy than the males. _x005F_x000D_ Reason (R)    : Females receive a better diet.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.
Answer» E.
Discussion
34.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Silver is not used to make electric wires. _x005F_x000D_ Reason (R)   :  Silver is a bad conductor.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
35.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : Legumes revive the soil fertility. _x005F_x000D_ Reason (R)    : Microbes in the root nodules of legumes fix the atmospheric nitrogen.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
36.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) :   When the bus starts, the person inside it falls forward. _x005F_x000D_ Reason (R)    :  The bus pushes the man forward.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. Both A and R are false.
Answer» E.
Discussion
37.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) :  The Indian Constitution came into force with effect from 26th January. 1950. _x005F_x000D_ Reason (R)    :  26th January is celebrated as the Republic Day.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
38.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Inside the earth metals are present in molten state. _x005F_x000D_ Reason (R)   : Earth absorbs the sun's rays.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
39.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A)  : In India, people elect their own representatives._x005F_x000D_  Reason (R)    : India is a democracy.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
40.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) :   Razia Sultan was the daughter of Iltutmish. _x005F_x000D_ Reason (R)    :  Iltutmish was a rebel.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» D. A is false but R is true.
Discussion
41.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Cut fruits and vegetables should not be kept in open for long. _x005F_x000D_ Reason (R)   : Their vitamin content is ruined.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
42.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Appendix is a vestigial organ in human body. _x005F_x000D_ Reason (R)    : It does not participate in digestion.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
43.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative _x005F_x000D_ Assertion (A) : Carbon monoxide when inhaled causes death. _x005F_x000D_ Reason (R) : Carbon monoxide combines with haemoglobin.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and It are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and It are true but R is NOT the correct explanation of A.
Discussion
44.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative_x005F_x000D_ Assertion (A) :   Bats can fly in the night._x005F_x000D_ Reason (R) :      Bats emit ultrasonics.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» B. Both A and R are true but R is NOT the correct explanation of A.
Discussion
45.

Directions : For the Assertion (A) and Reason (R) below, choose the correct alternative_x005F_x000D_ Assertion (A) : An atom is neutral despite the charged particles in it. _x005F_x000D_ Reason (R) : The neutrons do not have any charge.

A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true but R is NOT the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.
Answer» C. A is true but R is false.
Discussion
46.

An assertion (A) and a reason (R) are given below._x005F_x000D_  _x005F_x000D_ Assertion (A) : Penguins are birds, found in the hottest regions of the earth._x005F_x000D_ Reason (R) : Birds in hot regions do not have wings._x005F_x000D_  _x005F_x000D_ Choose the correct option._x005F_x000D_

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true and R is not the correct explanation of A
C. A is true, but R is false
D. Both A and R are false
Answer» E.
Discussion
47.

An assertion (A) and a reason (R) are given below._x005F_x000D_  _x005F_x000D_ Assertion (A) : Mangoes are sweet when they are ripe._x005F_x000D_ Reason (R) : Mangoes are available mainly in summer in India._x005F_x000D_  _x005F_x000D_ Choose the correct option._x005F_x000D_

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
Answer» C. A is true, but R is false
Discussion
48.

An Assertion (A) and a Reason (R) are given below._x005F_x000D_  _x005F_x000D_ Assertion (A) : Beri-Beri is a viral infection._x005F_x000D_  _x005F_x000D_ Reason (R) : Vitamin deficiency causes diseases._x005F_x000D_  _x005F_x000D_ Choose the correct option._x005F_x000D_

A. A is false but R is true
B. A is true but R is false
C. Both A and R are false
D. Both A and R are true and R is the correct explanation of A
Answer» B. A is true but R is false
Discussion
49.

An assertion (A) and a reason (R) are given below._x005F_x000D_  _x005F_x000D_ Assertion (A) : Agricultural activities are less on mountainous regions._x005F_x000D_  _x005F_x000D_ Reason (R) : Mountains have less fertile terrain and difficult weather conditions._x005F_x000D_  _x005F_x000D_ Choose the correct option._x005F_x000D_

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true, but R is not the correct explanation of A
C. A is true, but R is false
D. A is false, but R is true
Answer» B. Both A and R are true, but R is not the correct explanation of A
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