First slide

Thermal expansion

Question

Which of the following statements are true
   a)   Rubber contracts on heating
   b)   Water expands on freezing
   c)   Water contracts on heating from 0⁰C to 4⁰C
   d)   Water expands on heating from 4⁰C to 40⁰C

Easy

A

(a) is correct
B

(b) and (c) are correct
C

(c)&(d) are correct
D

all are correct

Solution

On heating upto 4⁰C volume of water decreases upto 4⁰C and above 4⁰C volume increases on heating. Volume of ice is more than that of same mass of water. Hence statements (a), (b), (c) and (d) all are correct.

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