Choose the correct alternative from the following.
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) : Plaster of Paris is used by doctors for setting fractured bones.
Reason (R) : When Plaster of Paris is mixed with water and applied around the fractured limbs, it sets into a hard mass.
Answer: A
Plaster of Paris when mixed with water applied around the fractured limbs, it sets into a hard mass and keeps the bone joints in a fixed position.
So, it can be used for setting fractured bones.
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Assertion:
The problem solving ability, mental performance and memory of the employees of company C are deteriorating.
RI. Due to tight schedule at company C, the employees of the company are skipping their breakfast regularly.
RII. The job is physical in nature, but not mental.
Answer: D
Here in the assertion, we are only talking about the weakness of the employees. RI is giving the reason for skipping breakfast, so it is not the reason. RII is also not a valid reason, as lack of mental exercise may not lead to deterioration.
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Assertion (A) : An iron ball floats on mercury but gets immersed in water.
Reason (R) : The specific gravity of iron is more than that of mercury.
Answer: C
Iron with specific gravity less than that of mercury but more than that of water, floats in the former but gets immersed in the second.
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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) : Goitre is a common disease in mountainous regions.
Reason (R) : The diet of the people in mountains lacks iodine content.
Answer: A
Goitre is commonly caused in mountainous regions because goitre is caused by deficiency of iodine and diet in mountainous areas lacks iodine.
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Assertion (A) : Copper is used to make electric wires.
Reason (R) : Copper has very low electrical resistance.
Answer: A
A low electrical resistance of copper makes it a good electric conductor.
So, it is used to make electric wires.
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Assertion (A) : Buddha left home after his marriage.
Reason (R) : He wished to be free of all worldly ties and become an ascetic.
Answer: A
Buddha left home even after his marriage because he wished to free himself of all worldly ties and becomes an ascetic.
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Assertion (A) : Eskimos reside in igloos.
Reason (R) : No other material except snow is available.
Answer: C
Eskimos live in snow houses called igloos because snow, being a bad conductor of heat, these houses are warm inside.
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