A) Groups 3, 4 and 5
B) Groups 5, 6 and 7
C) Groups 4, 5 and 6
D) Groups 7, 8 and 9
E) Groups 6, 7 and 8
Correct Answer: D
Solution :
Elements having electronegativity in the range of\[1.35-1.82\]do not form stable hydride. Thus, leads to hydride gap. These are present in the middle of the Periodic Table, ie, belong to groups 7, 8 and 9.
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