Choose the correct alternative from the following.
Assertion (A) : Telephone wires sag more in summer.
Reason (R) : They expand due to summer heat.
Answer: A
The metal of telephone wires expand in summer and the wires become loose. So, they sag.
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Assertion (A) : Uranium undergoes nuclear fusion reaction.
Reason (R) : It has a big, unstable nucleus.
Answer: D
Having a big, unstable nucleus, uranium undergoes nuclear fission reaction.
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Assertion (A) : Roughage prevents constipation.
Reason (R) : Roughage adds bulk to the food.
Answer: A
Roughage adds bulk to the food and makes its passage through the stomach easier,
thus preventing constipation.
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Assertion (A) : Earthworms are not good for agriculture.
Reason (R) : Earthworms break down the soil into fine particles and make it soft.
Answer: D
Earthworms help in agriculture because they make the soil soft and porous.
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Assertion:
Students are showing great interest in taking their degrees from U.K. Universities with regard to management studies.
RI. U.K. Universities have proved to be the best in grooming students for a career in management.
RII. Other countries cannot provide the facilities for management courses as U.K. Universities provide.
Answer: D
A student may prefer a university considering the structure of academics of the facilities offered. Hence, both RI and RII are valid reasons.
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Assertion (A) : Amoebiasis is an occupational disease.
Reason (R) : Amoebiasis is caused by inhalation of asbestos dust.
Answer: C
Amoebiasis is a microbial disease, caused by protozoa.
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Assertion (A) : Land breeze blows during night.
Reason (R) : Land gets heated up quickly.
Answer: B
Land gets heated up quickly and also cools quicker than sea at night so taht cool winds called the land breeze blow from land to sea.
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Assertion (A) : Bronze is used for making statues.
Reason (R) : Bronze is an alloy of copper and trin.
Answer: B
Bronze is an alloy of copper and tin.
It is resistant to corrosion and so it is used to make statues.
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Assertion:
Astrological forecasts published in various magazines often vary.
RI. Different astrologers have their own methodology of making predictions.
RII. Different astrologers have studied at different universities.
Answer: A
"What causes the variance in forecasts"?
Answer to the above question is well explained by RI and hence it is a valid reason.
RII : If astrology is a science or a study, its methodology and practice cannot vary from one university to another.
Hence, RII is not a valid reason.
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Assertion:
The newly constructed bridge collapsed and caused death of many people.
RI. The design of the bridge was not proper.
RII. The bridge was constructed on black cotton soil.
Answer: A
Here the assertion is about the collapse of the newly constructed bridge, which is possible because of faulty construction or because of improper design. Hence, I can be reason.
RII talks about type of soil, which is out of context.
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