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Subject :NSO    Class : Class 8

Read the given statements and select the correct option.
Statement 1 : Sound would travel faster on a hot summer day than on a cold winter day.
Statement 2 : Velocity of sound depends on temperature.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true and statement 2 is false.
D Both statements 1 and 2 are false.


Sound travels slow in high temperatures .

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
As said in the solution, velocity of sound increases with increase in humidity.Also, the 2nd statement is correct, since the velocity of sound is inversely proportional to the density in the medium. Hence, statement 1 is false, while statement 2 is true. The answer should be Option D. SOF, PLEASE RECTIFY ALL THESE ERRORS.

Ans 4:

Class : Class 8
The correct answer would be B only because due to high humidity, particles would be closer to each other, which would cause the soundwave to propagate more easily, as it travels fastest in solids. Though the reason is correct in itself it is not the the proper reason for the assertion as the correct reason should be due to the closeness of the particles.

Ans 5:

Class : Class 9
it should be c

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