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Standard X

Chemistry

Reaction with Metals

An aqueous so...

Question

An aqueous solution of a metal salt (X) reacts with carbon dioxide to give a water soluble compound (Y) which on heating gives the starting metal salt back Y when present in water does not produce lather with soap. The compounds X and Y, respectively are

C a C O_{3}

and

C a (H C O_{3})_{2}

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M g (H C O_{3})_{2}

and

M g C O_{3}

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C a (H C O_{3})_{2}

and

C a C O_{3}

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M g C O_{3}

and

M g (H C O_{3})_{2}

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Solution

The correct option is A $C a C O_{3}$ and $C a (H C O_{3})_{2}$
$C a C O_{3} + H_{2} O + C O_{2} \to C a (H C O_{3})_{2}$
$C a (H C O_{3})_{2} Δ - \to C a C O_{3} + H_{2} O + C O_{2}$

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Question 24.
Which of the following statements is not correct ?

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An aqueous solution of a metal salt (X) reacts with carbon dioxide to give a water soluble compound (Y) which on heating gives the starting metal salt back Y when present in water does not produce lather with soap. The compounds X and Y, respectively are

The correct option is A CaCO3 and Ca(HCO3)2CaCO3+H2O+CO2→Ca(HCO3)2Ca(HCO3)2Δ−→CaCO3+H2O+CO2

The correct option is A $C a C O_{3}$ and $C a (H C O_{3})_{2}$
$C a C O_{3} + H_{2} O + C O_{2} \to C a (H C O_{3})_{2}$
$C a (H C O_{3})_{2} Δ - \to C a C O_{3} + H_{2} O + C O_{2}$