Assertion And Reason(Reasoning Aptitude ) Questions and answers for exam Preparation

Reasoning Aptitude

ASSERTION AND REASON MCQs

Assertion And Reason

Total Questions : 239 | Page 3 of 24 pages

Question 21.

Assertion (A):

We prefer to wear white clothes in winter.

Reason (R):

White clothes are good reflectors Of heat.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option D. -> A is false but R is true.
Answer: (d)
We prefer to wear dark clothes in winter because they absorb heat and keep the body warm.
However, white clothes are good reflectors of heat and are worn in summer.

Question 22.

Assertion (A):

Unpolished rice should be eaten.

Reason (R):

Polished rice lacks Vitamin B.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option A. -> Both A and R are true and R is the correct explanation of A.
Answer: (a)
The husk of unpolished rice contains Vitamin B1, deficiency of which causes the disease Beriberi.
So, the rice should be eaten unpolished.

Question 23.

Assertion (A):

Leakages in household gas cylinders can be detected.

Reason (R):

LPG has a strong smell.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option C. -> A is true but R is false.
Answer: (c)
Leakages in household gas cylinders can be detected because of the strong smell of ethyl mercaptan mixed with LPG.

Question 24.

Assertion (A):

Copper is used to making electrical wires.

Reason (R):

Copper has very low electrical resistance.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option A. -> Both A and R are true and R is the correct explanation of A.
Answer: (a)
The low electrical resistance of copper makes it a good electric conductor.
So it is used to make electric wires.

Question 25.

Assertion (A):

When a body is dipped in a liquid fully or partially, there is a decrease in its weight.

Reason (R):

The decrease in weight is due to the higher density of the displaced liquid.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option C. -> A is true but R is false.
Answer: (c)
When a body is dipped in a liquid, there is a decrease in weight due to the upward thrust exerted on it by the water.

Question 26.

Assertion (A):

We feel comfortable in a hot and humid climate.

Reason (R):

Sweat evaporates faster in a humid climate.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option E. -> Both A and R are false.
Answer: (e)
We feel uncomfortable in hot and humid climate because, in hot weather, the body sweats more but due to high humidity, this sweat does not evaporate easily.

Question 27.

Assertion (A):

No food material normally enters the windpipe during swallowing.

Reason (R):

When we swallow, the back portion of our tongue covers the opening of the windpipe.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option A. -> Both A and R are true and R is the correct explanation of A.
Answer: (a)
R explains A fully.

Question 28.

Assertion (A):

A saltwater fish drinks seawater whereas a freshwater fish never drinks water.

Reason (R):

A saltwater fish is hypertonic to its environment while a freshwater fish is hypotonic to its environment.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option C. -> A is true but R is false.
Answer: (c)
A is clearly true. However, this happens because a saltwater fish is hypotonic to its environment while a freshwater fish is hypertonic to its environment.

Question 29.

Assertion (A):

Ventilators are provided near the roof.

Reason (R):

Conduction takes place better near the roof.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option C. -> A is true but R is false.
Answer: (c)
Ventilators are provided near the roof as the air upon heating, rises and so can be thrown out of a room through high ventilators.

Question 30.

Assertion (A):

Seeds should be treated with fungicide before being sown.

Reason (R):

Seeds do not germinate unless treated with a fungicide solution.

Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Both A and R are false.

Discuss Question

Answer: Option C. -> A is true but R is false.
Answer: (c)
Seeds are treated with fungicides before sowing to avoid seed-borne diseases. However, seeds may germinate, even if not treated with a fungicide solution.