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Solution


Q.

The property/properties that show irregularity in the first four elements of group-17 are:

(A) Covalent radius

(B) Electron affinity

(C) Ionic radius

(D) First ionization energy

Choose the correct answer from the options given below:                            [2025]
1 B and D only  
2 A and C only  
3 B only  
4 A, B, C and D  

Ans.

(3)