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Q.

Assertion(A) van-Arkel method is used to prepare ultra-pure sample of some metals
Reason(R) it involves reaction of CO with metals to form volatile carbonyls which decompose on heating to give pure metal.

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a

Both A and R are true and R is correct explanation of A

b

Both A and R are false

c

Both A and R are true but R is not correct explanation of A

d

A is true but R is false

answer is C.

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Detailed Solution

Van-Arkel method involve the use of $l_{2}$ to form volatile iodide of metals which on decomposition gives pure metal.

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Assertion(A) van-Arkel method is used to prepare ultra-pure sample of some metalsReason(R) it involves reaction of CO with metals to form volatile carbonyls which decompose on heating to give pure metal.