Assertion: van method is used to prepare ultrapure samples of some metals.
Reason: It involves reaction of `CO` with metals to form volatile carbony,s which decompose on heating to give pure metal.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

C

Explanation

van Arkel method involves use of `I_(2)` to from volatile iodide of metals which on decomposition gives pure metals.