STATEMENT - I: Newton’s equation for speed of sound in air was found wrong because, he assumed process as isothermal.
STATEMENT – II: Flow of sound wave in a medium is very fast. Quick process suppress heat exchange, hence this process must be adiabatic in nature.

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STATEMENT – I is True, STATEMENT – 2 is True; STATEMENT – 2 is NOT a Correct explanation for STATEMENT – 1

STATEMENT – I is True, STATEMENT – 2 is True; STATEMENT – 2 is a correct explanation for STATEMENT – 1

STATEMENT – 1 is True, STATEMENT – 2 is False

STATEMENT – 1 is False, STATEMENT – 2 is True

answer is A.

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Detailed Solution

According to Newton, when sound waves propagate in air, compression and rarefaction are formed. He assumed that the process is very slow, and the heat produced during compression is given to surrounding and heat loss during compression is gained from surrounding. So the temperature remains constant and sound waves propagate through an isothermal process.
but flow of sound wave in a medium is very fast. Quick process suppress heat exchange, hence this process must be adiabatic in nature.

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