Question

3. Answer Q. Nos. 3(a) – 3(d) on the basis of your understanding of the following

paragraph and the related studied concepts:- [4x1=4]

Interconversion of states of matter can be brought about by either change of

temperature or pressure or both. During interconversion of states of matter

temperature remains constant although heat is continuously supplied or withdrawn.

Heat supplied or withdrawn is used to bring about the change of state of matter.

(a) Why does the temperature of a substance remain constant during melting

process?

(b) Why steam at 100⁰c is better for heating purposes than water at 100⁰c?

(c) It is a hot Summer Day. Aneek and Madhu are wearing cotton and nylon clothes

respectively. Who do you think would be more comfortable and why?

(d) Which gas is called as dry ice?​

Answer 1

Answer:

Let s be the length of arc AB of a circle of radius .

Let O be the centre of the circle.

If BOA = then

s = 

Explanation:

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