Relationship between Vapor Density & Relative Molecular Mass
Assertion: Va...
Question
Assertion: Vapour density of sulphur vapour relative to oxygen is 2 because sulphur atom is twice as heavy as that of oxygen atom. Reason: Vapour density depends upon the molecular state of the substance in vapour state.
A
If both (A) and (R) are correct and (R) is the correct explanation of (A).
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B
If both (A) and (R) are correct but (R) is not the correct explanation of (A).
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C
If (A) is correct but (R) is wrong.
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D
If (A) is wrong but (R) is correct.
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E
If both (A) and (R) are wrong.
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Solution
The correct option is B If (A) is correct but (R) is wrong. Molecular weight of oxygen =32 Molecular weight of Sulphur =64 Vapour density of Sulphur =2×( V.D of oxygen )
Vapour density depends on Molar mass but not on molecular state Hence Assertion is true but reason is wrong.