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Solution


Q.

The electron affinity value are negative for

A.    Be→Be-

B.    N→N-

C.    O→O2-

D.    Na→Na-

E.    Al→Al-

Choose the most appropriate answer from the options given below:              [2024]
1 A, B and C only  
2 D and E only  
3 A and D only  
4 A, B, D and E only  

Ans.

(1)

Electron affinity is negative for Be, Mg, N and noble gases. So (A) and (B) has negative value of electron affinity. Sum of first and second electron affinity for every element is negative. So (C) has negative electron affinity.