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Water expands on reducing its temperatur...

Water expands on reducing its temperature below `"….............."` `.^(@) C `.

A

0

B

4

C

12

D

5

Text Solution

Verified by Experts

The correct Answer is:
(B)
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If a gas expands at constant temperature

If a gas expands at constnat temperature .

Assertion (A): The volume of a given mass of water is more at 0^(@)C when compared to water at 4^(@)C Reason (R ): Water expands when its temperature is incresed form 0^(@)C to 4^(@)C

Given that water freezes below zero degree celsius. Consider the following statements : p : water froze this morning , q : this morning temperature was below 0^(@) C which of the following is correct ?

Most substances contract on freezing . However, water does not belong to this category. We know that water expands on freezing. Further , coefficient of volume expansion of water in the temperature range from 0^(@)C to 4^(@)C is negative and above 4^(@)C it is positive . This behaviour of water shapes the freezing of lakes as the atmospheric temperature goes down and it is still above 4^(@)C . As the atmospheric temperature goes below 4^(@)C