>> General Science >> Assertions and Reasons
1). Directions : In the questions given below are two statements labelled as Assertion (A) and Reason (R ). In the context of the two statements, which of the following is correct?
Assertion (A) : A gas filled balloon stops rising after it has attained a certain height in the sky.
Reason (R ) : At the highest point, the density of air is such that the buoyant force on the balloon just equals its weight.

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.
2). Assertion (A) : It is fatal to touch a live wire with bare feet and uncovered hands.
Reason (A ) : The electric current passes through the body to the earth forming a circuit and burns the blood.

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.
3). Assertion (A) : Sound waves cannot be polarised.
Reason (R ) : Sound waves can be longitudinal or transverse.

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.
4). Assertion (A) : Weightlessness means zero gravity.
Reason (R ) : Zero gravity can be attained if the gravitational force of the each is balanced by centrifugal force.

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.
5). Assertion (A) : Appendix is a vestigial organ in human body.
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.
6). Assertion (A) : Water can exist in all the three state i.e. solid, liquid and gas.
Reason (R ) : Water has high boiling point.

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.
7). Assertion (A) : Obesity is not a problem for a sportsman even though his diet contains more carbohydrates and fats than an average man.
Reason (R ) : A sportsman is able to spend more calories through strenuous exercise.

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.
8). Assertion (A) : We prefer to wear white clothes in winter.
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.
9). Assertion (A) : Legumes revive the soil fertility.
Reason (R ) : Microbes in the root nodules of leguminous plants 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.
10). Assertion (A) : Unpolished rice should be eaten.
Reason (R ) : Polished rice lacks Vitamin B1.

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.