The atomic numbers of elements A,B,C and D are Z-1,Z,Z+1 and Z+2, respectively. If ‘B’ is a noble gas, choose the correct answers from the following statements
a) ‘A’ has higher electron affinity
b) ‘C’ exists in +2 oxidation state.
c) C is more electropositive in the group
c) D’ is an alkaline Earth metal.

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a&b

b&c

a&c

a,b&c

answer is C.

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Detailed Solution

$\begin{array}{l} A & B & C & D \end{array} \begin{matrix} Z - 1 & Z & Z + 1 & Z + 2 \end{matrix} H a \log e n N o b l e g a s I A I I A$

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