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Standard XII

Chemistry

Carbon Monoxide

Assertion :Aq...

Question

Assertion :Aqueous solution of hydrogen peroxide is kept in the glass or metal container containing some urea or phosphoric acid. Reason: Urea or phosphoric acid acts as a negative catalyst for the decomposition of hydrogen peroxide.

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
Kept in plastic or wax-lined glass containing urea or phosphoric acid, because traces of alkali metal ions from the glass and metal ions from the metal surface respectively can catalyse the explosive decomposition of $H_{2} O_{2}$ .

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Similar questions

Q. Assertion: The impurities such as

{SiO}_{2}

present in iron ore is removed by

{CaCO}_{3}

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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

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and

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Reason: The compressibility factor for

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Assertion (A) Ethanol is a weaker acid than phenol.
Reason (R) Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH.
(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.

Assertion (A) IUPAC name of the compund
$C H_{3} - C H | C H_{3} - O - C H_{2} - C H_{2} - C H_{3}$ is 2-ethoxy-2-methylethane
Reason (R) In IUPAC nomenclature, ether is regarded as hydrocarbon derivative in which a hydrogen atom is replaced by - OR or - 0AR group [where, R = alkyl group and Ar = aryl group].
(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 :Aqueous solution of hydrogen peroxide is kept in the glass or metal container containing some urea or phosphoric acid. Reason: Urea or phosphoric acid acts as a negative catalyst for the decomposition of hydrogen peroxide.

The correct option is D Assertion is incorrect but Reason is correctKept in plastic or wax-lined glass containing urea or phosphoric acid, because traces of alkali metal ions from the glass and metal ions from the metal surface respectively can catalyse the explosive decomposition of H2O2.