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Which of the following represents the co...

Which of the following represents the correct order of increasing first ionisation enthalpy for `Ca,Ba,Se`, and `Ar`?

A

`CaltSltBaltSeltAr`

B

`SltSeltCaltBaltAr`

C

`BaltCaltSeltSltAr`

D

`CaltBaltSltSeltAr`

Text Solution

Verified by Experts

The correct Answer is:
C
Order of increasing `DeltaH_(IE_(1)):BaltCaltSeltSltAr`
`BaltCa,SeltS:` On moving top to bottom in a group, size increases. So ionisation energy decreases.
Ar : Maximum value of ionisation energy, since it is an inert gas.
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