Question

Assertion (A) :

20 \mathrm{g}

of

50 \%

pure

\mathrm{CaCO}_3

on heating gave 2.24 L

\mathrm{CO}_2

at STP and

15.6 \mathrm{~g}

non-volatile residue.

\mathrm{CaCO}_3 \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_2

Reason (R): Pure

\mathrm{CaCO}_3

is

10 \mathrm{~g}

which gave

4.4 \mathrm{~g}

\mathrm{CO}_2(=0.1 \mathrm{~mol}=2.24 \mathrm{~L}

at STP

)

and

15.6 \mathrm{~g}

residue is left.

Accepted Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$.

Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is not the correct explanation of $\mathbf{A}$.

Answer

$\mathbf{A}$ is true but $\mathbf{R}$ is false.

Answer

$\mathbf{A}$ is false but $\mathbf{R}$ is true.

JEE CHEMISTRY MCQ: SOME BASIC CONCEPTS OF CHEMISTRY

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