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Standard XII

Chemistry

Catalytic Properties

Assertion :Ir...

Question

Assertion :Iron(III) catalyses the reaction between iodide and persulphate ions. Reason: Transition metals act as catalysts.

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 B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
$2 I^{-} + S_{2} O_{8}^{2 -} {F e}^{3 +} - -- \to I_{2} + 2 {S O}_{4}^{2 -}$
Catalytic action of ${F e}^{3 +}$
${2 F e}^{3 +} + 2 I^{-} \to {2 F e}^{2 +} + I_{2}$
${2 F e}^{2 +} + S_{2} O_{8}^{2 -} \to 2 {F e}^{3 +} + 2 {S O}_{4}^{2 -}$
All transition metals couldn't show this land of catalysis.

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Similar questions

Q. Assertion: The compressibility factor for

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and

H e

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

Reason: The compressibility factor for

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

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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.

Q. Assertion: The impurities such as

{SiO}_{2}

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

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Assertion :Iron(III) catalyses the reaction between iodide and persulphate ions. Reason: Transition metals act as catalysts.

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion2I−+S2O2−8Fe3+−−−→I2+2SO2−4Catalytic action of Fe3+2Fe3++2I−→2Fe2++I22Fe2++S2O2−8→2Fe3++2SO2−4All transition metals couldn't show this land of catalysis.