Assertion : $H_{2} S O_{4}$ is a strong oxidizing agent. Reason: Concentrated $H_{2} S O_{4}$ oxidises sulphide ions to sulphur trioxide.

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 C Assertion is correct but Reason is incorrect
$H_{2} S O_{4}$ is a strong oxidising agent. This is because $H_{2} S O_{4}$ is a strong acid so it reacts with a weak amphoteric base water and gives $H_{3} O^{+}$ ions in dilute selections. But in concentrated solution very water so it proceeds in the way to form $H_{2} O$ . It gets concerted to $H_{2} S O_{3}$ which as is not stable, so is further dissolved to $H_{2} O + S O_{3},$ thus will fulfill its desire. So, $S u l f u r i c$ $a c i d$ in concentrated form gives nascent oxygen & forms $H_{2} S O_{3} .$ This nascent oxygen acts as oxidising agent.
$H_{2} S O_{4} ⟶ [O] + H_{2} S O_{3} H_{2} S O_{3} ⟶ S O_{3} + H_{2} O .$

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Assertion :H2SO4 is a strong oxidizing agent. Reason: Concentrated H2SO4 oxidises sulphide ions to sulphur trioxide.

Assertion : $H_{2} S O_{4}$ is a strong oxidizing agent. Reason: Concentrated $H_{2} S O_{4}$ oxidises sulphide ions to sulphur trioxide.