Question

1.
Write one word for the following statements.
(a) The S.I. unit of frequency of sound.
10) The type of combustion, represented by burning of white phosphorous
in air at room temperature.
(c) The revolution that was brought about in India in 1960's to increase
production of food grains.
(d) The chemical substance that controls the changes at adolescence.







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Answer 1

Answer:

(a) Hertz

(b) spontaneous

(c) Green revolution

(d)hormones

Answer 2

Explanation:

a) Hertz

b) spontaneous

c) green Revolution

d) hormones