Assertion: Be and Mg do not impat characteristic colour to the flame.
Reason: both Be and Mg have high ionization energy.

Options

A. If both `(A)` and `(R )` are correct and `(R )` is the correct explanation of `(A)`.
B. If both `(A)` and `(R )` are correct, but `(R )` is not the correct explanation of `(A)`.
C. If `(A)` is correct, but `(R )` is incorrect.
D. If `(A)` is incrrect, but `(R )` is correct.

Answer

D

Explanation

Correct assertion: `Be` and `Mg` do not impart characteristic colour to the flame.
Correct reason: As compared to other alkaline earth metals, ionisation enthalpy of both `be` and `Mg` are very high.