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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

`Calt S lt Ba lt Se lt Ar`

B

`S lt Se lt Ca lt Ba lt Ar`

C

`Ba lt Ca lt Se lt S Ar`

D

`Ca lt Ba lt S lt Se lt Ar`

Text Solution

Verified by Experts

The correct Answer is:
C
Ionisation energy increases along a period from left to right and decreases down the group.
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