12. In which of the following lists do the ions not appear in order o asing...

Question

Question

Answer 1

Answer #1

OPTION A

while comparing different isoelectronic species, compare e/p (electron/proton) ratio. The larger the value, larger is the ion.

A) the ions e/p

S-2 18/16

Cl- 18/17

K+ 18/19

Thus S-2 ion is the largest and K+ is the smallest.

The order given is reverse. Thus it is the wrong option.

B) Na+ (10/11) , F-(10/9) , O-2(10/8) so order is Na+ < F- < O-2

C , D and E are obvious as the y belong to same group or period.

Answer 2

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