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Assertion : Water expands both when heat...

Assertion : Water expands both when heated or cooled from `4^(@)C`
Reason : Density of water is minimum at `4^(@)C`.

A

If both assertion and reason are true and reason is the correct explanation of assertion

B

If the assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true but reason is false.

D

If both assertion and reason are false.

Text Solution

Verified by Experts

The correct Answer is:
C
At `4^(@)C` the volume of water minimum. When it is cooled below `4^(@)C` or heated above`4^(@)C`, then it expands or its volume increases. As volume at `4^(@)C` is minimum thus its density `(=("mass")/("volume"))` will be maximum.
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Knowledge Check

  • At 4^(@)C , the density of water is

    A
    10 `g//cm^(3)`
    B
    `4g//cm^(3)`
    C
    `4xx10^(3) kg//m^(3)`
    D
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    A
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    B
    `1000 kg cm^(-3)`
    C
    `1000 g cm^(-3)`
    D
    `1 kg cm^(-3)`

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    A
    If both assertion and reason are true and the reason is the correct explanation of the assertion.
    B
    If both assertion and reason are true but reason is not the correct explanation of the assertion.
    C
    If assertion is true but reason is false
    D
    If the assertion and reason both are false

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