Assertion :White phosphorus is more reactive than red phosphorus. Reason: It readily catches fire in air to give dense white fumes of $P_{4} O_{10}$ .

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
Based on thermodynamic properties, white phosphorus is more reactive than red phosphorus. Due to its high reactivity, white phosphorus readily burns in air giving white fumes of $P_{4} O_{10}$ . Red $P$ burs producing $P_{4} O_{6}$ .

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