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the correct order of electron gain entha...

the correct order of electron gain enthalpy with negative sign of `F,Cl,Br and I` , having atomic number `9,17,35 and 53` respectively is

A

`I gt Br gt C1 gt F`

B

`F gt C1 gt Br gt I`

C

`C1 gt F gt Br gt I`

D

`Br gt C1 gt I gt F`

Text Solution

Verified by Experts

The correct Answer is:
C
Due to smaller size `Delta_(eg) H_(1)` F is lower than that of C1 .
Thus correct order of electron gain enthalpy (in kJ `mol^(-1))` with negative sigh follows the order :
`C1 (-349 ) gt F (-328) gt Br (-325) gt (- 295)` i.e., option ( c ) is correct.
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