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General Science - Questions and Answers

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321. The colouring matter in the process of bleaching of textiles by the use of bleaching powder gets
A. absorbed
B. oxidised
C. reduced
D. displaced
Explanation:
322. Given below are two statements, labeled as Assertion (A) and Reason (R). In the context of the two statements, which of the following is correct ?Assertion (A) : Air passengers sometimes feel pain in the ears when the plane rapidly loses height.Reason (R) : Atmospheric pressure is larger at lower altitudes.
A. Both A and R are true but 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.
Explanation:
323. Athletes normally have larger sized hearts because
A. their blood is thicker and requires more heart muscle to circulate it.
B. greater blood pressure developed during workout requires thicker heart walls.
C. their cardiac output is regulated by change of cardiac rate during workout.
D. their cardiac output is regulated by change of stroke volume during workout.
Explanation:
324. A moderator is used in nuclear reactors in order to
A. increase the number of neutrons
B. decrease the number of neutrons
C. slow down the speed of neutrons
D. accelerate the neutrons
Explanation:
325. Who first established the fact that the earth revolves round the sun ?
A. Kepler
B. Copernicus
C. Newton
D. Galileo
Explanation:
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