Assertion (A): The boiling points of alkyl Halides decrease in the order $R - I > R - B r > R - C l > R - F$
Reason (B) : The boiling points of alkyl chlorides, bromides and Iodides are considerably higher than that of the hydrocarbon of comparable molecular mass.

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(A) is correct, but (R) is wrong

(A) and (R) both are correct and (R) is not correct explanation of (A)

(A) and (R) both are correct and (R) is correct explanation of (A)

(A) is wrong, but (R) is correct

answer is B.

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Detailed Solution

For the same hydrocarbon part, boiling point depends upon the atomic mass of halogen atom. Higher the mass of halogen atom, higher will be the boiling point. So boiling point decrease with decreases in atomic mass of halogen atom.

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