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521. Chloromycetin is a durg for
A. tuberculosis
B. typhoid
C. whooping cough
D. malaria
Explanation:
522. Which of the following components of solar radiation cause sunburn ?
A. Infra-red
B. Iltraviolet
C. Visible radiation
D. Both (A) and (B)
Explanation:
523. A bomb is dropped at a point from a moving aeroplane. The pilot observes that
A. bomb drops vertically downwards.
B. bomb remains stationary in the air.
C. the bomb traverses a curved path and falls some distance ahead.
D. the bomb traverses a cruved path and falls some distance behind that point.
Explanation:
524. Which of the following statements are correctly associated with ultrasonic waves ? 1. These are the acoustic waves of frequencies more than 20,000 Hertz. 2. When possible to use, these waves are preferred over X-rays for getting an image of internal organs because they are not harmful. 3. Their velocity is more than the velocity of sound.
A. 1 only
B. 1 and 2
C. 2 and 3
D. 1 and 3
Explanation:
525. Which of the following seeds grows by epigeal germination ?
A. Rice
B. Wheat
C. Gram
D. Bean
Explanation:
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