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Assertion (A) : When we blow into a test...

Assertion (A) : When we blow into a test - tube containing lime water ,it turns milky
Reason (R ) : This shows the presence of `CO_(2)` in the exhaled air .

A

Both A and R are true , and R is the correct explanation of A.

B

Both A and R are true , but R is not the correct explanation of A.

C

A is true but R is false .

D

A is false but R is true .

Text Solution

Verified by Experts

The correct Answer is:
C
When we blow air in lime water the `CO_(2)` present in the exhaled air turns (it milky). The milky colour is due to the formation of calcium carbonate.
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Knowledge Check

  • When we blow air from the mouth into a test tube containing lime water, it turns milky due to the presence of

    A
    oxygen
    B
    `CO_2`
    C
    `N_2`
    D
    Water vapour

  • When air blown from mouth into a test-tube containing lime water, the lime water turns milky due to the presence of :

    A
    oxygen
    B
    carbon dioxide
    C
    nitrogen
    D
    alcohol

  • When air is blown from mouth into a test - tube containing lime water, the lime water turned milky due to the presence of

    A
    oxygen
    B
    carbon dioxide
    C
    nitrogen
    D
    water vapour

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    Assertion (A): When carbon dioxide gas is passed through lie water, lime water is turned milky. Reason (R): Calcium carbonate is soluble in water.

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    Lime water turns milky when ... ........ gas is passed through it.

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