A) 1 and 2 |
B) 2 only |
C) 3 only |
D) 1 and 4 |
A) 1 and 2 |
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.
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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.
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3). Assertion (A) : Sound waves cannot be polarised. Reason (R ) : Sound waves can be longitudinal or transverse.
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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.
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5). Assertion (A) : Appendix is a vestigial organ in human body. Reason (R ) : It does not participate in digestion.
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6). Assertion (A) : Water can exist in all the three state i.e. solid, liquid and gas. Reason (R ) : Water has high boiling point.
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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.
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8). Assertion (A) : We prefer to wear white clothes in winter. Reason (R ) : White clothes are good reflectors of heat.
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9). Assertion (A) : Legumes revive the soil fertility. Reason (R ) : Microbes in the root nodules of leguminous plants fix the atmospheric nitrogen.
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10). Assertion (A) : Unpolished rice should be eaten. Reason (R ) : Polished rice lacks Vitamin B1.
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