Consider the following values of IE(ev) for elements W and X:-
$\begin{matrix} E l e m e n t & I E_{1} & I E_{2} & I E_{3} & I E_{4} W & 10.5 & 15.5 & 24.9 & 79.8 X & 8 & 14.8 & 78.9 & 105.8 \end{matrix}$
Other two elements Y and Z have outer electronic configuration $n s^{2} n p^{4}$ and $n s^{2} n p^{5}$ respectively.
According to given information which of the following compound (s) is/are not possible.
$(A) W_{2} Y_{3} (B) X_{2} Y_{3} (C) W Z_{2} (D) X Z_{2}$

A, B

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B, C

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C, D

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A, D

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Solution

The correct option is B B, C
Valency of w = 3 Valency of y = 2
Valency of x = 2 Valency of z = 1
$W_{2} Y_{3}$ and $X Z_{2}$ are possible

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The correct option is B B, CValency of w = 3 Valency of y = 2 Valency of x = 2 Valency of z = 1 W2Y3 and XZ2 are possible

The correct option is B B, C
Valency of w = 3 Valency of y = 2
Valency of x = 2 Valency of z = 1
$W_{2} Y_{3}$ and $X Z_{2}$ are possible