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Standard XII

Chemistry

Uses of Slaked Lime

Assertion :Th...

Question

Assertion :The reaction in $C a C O_{3}$ and $H C l$ goes to completion. Reason: Reactions that form a precipitate go to completion

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
The reaction of $H C l$ with calcium carbonate goes to completion with the evolution of carbon dioxide gas.
$C a r b o n a t e s + H y d r o c h l o r i c a c i d \to M e t a l l i c c a r b i d e s + W a t e r + C a r b o n d i o x i d e ↑$
${C a C O}_{3} + H C l \to {C a C l}_{2} + H_{2} O + C O_{2} ↑$

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

.

Reason:

CaO

formed by decomposition of

{CaCO}_{3}

reacts with

{SiO}_{2}

to form slag.

Assertion – The non-fusible impurities present in iron ore are removed by $C a C O_{3}$ .

Reason: $C a C O_{3}$ which decomposes into $C a O$ and $C O_{2}$ . The $C a O$ formed reacts with $S i O_{2}$ to remove silica

Q. Assertion: The compressibility factor for

H_{2}

and

H e

(1 + \frac{P b}{R T})

Reason: The compressibility factor for

H_{2}

and

H e

can be derived from Van der Waal's equation.

Assertion (A) The enthalpy of reaction remains constant in the presence of a catalyst.

Reason (R) A catalyst participating in the reaction forms different activated complex and lowers down the activation energy but the difference in enrgy of reactant and product remains the same.

(a) Both assertion and reason are correct and the reason is correct explanation of assertion
(b) Both assertion and reason are correct, but reason does not explain assertion.
(c) Assertion is correct, but reason is incorrect
(d) Both assertion and reason are incorrect
(e) Assertion is incorrect but reason is correct.

ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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Assertion :The reaction in CaCO3 and HCl goes to completion. Reason: Reactions that form a precipitate go to completion

Assertion :The reaction in $C a C O_{3}$ and $H C l$ goes to completion. Reason: Reactions that form a precipitate go to completion