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Standard XII

Chemistry

Stoichiometry

Assertion :Co...

Question

Assertion :Copper reacts with $H C l$ and liberates hydrogen. Reason: Hydrogen is present above $C u$ in the reactivity series.

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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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Copper does not liberate hydrogen from $H C l$ because copper is above hydrogen in reactivity series.
Hence, an assertion is incorrect but the reason is correct.

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Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

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Reason:

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{CaCO}_{3}

reacts with

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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

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Assertion (A) Boiling points of alcohols and ethers are high.
Reason (R) They can form intermolecular hydrogen-bonding.
(a) Assertion and reason both are correct and reason is correct explanation of assertion.
(b) Assertion and reason both are wrong statements.
(c) Assertion is correct statement but reason is wrong statement.
(d) Assertion is wrong statement but reason is correct statement.
(e) Both assertion and reason are correct statements but reason is not correct explanation of assertion.

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Assertion :Copper reacts with HCl and liberates hydrogen. Reason: Hydrogen is present above Cu in the reactivity series.

The correct option is D Assertion is incorrect but Reason is correctCopper does not liberate hydrogen from HCl because copper is above hydrogen in reactivity series.Hence, an assertion is incorrect but the reason is correct.

Assertion :Copper reacts with $H C l$ and liberates hydrogen. Reason: Hydrogen is present above $C u$ in the reactivity series.

The correct option is D Assertion is incorrect but Reason is correct
Copper does not liberate hydrogen from $H C l$ because copper is above hydrogen in reactivity series.
Hence, an assertion is incorrect but the reason is correct.