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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, S, Se and Ar ?

A

Ca S Ba Se Ar

B

S Se Ca Ba Ar

C

Ba Ca Se S Ar

D

Ca Ba S Se Ar

Text Solution

Verified by Experts

The correct Answer is:
C
In a group I.E. decreases and therfore`CagtBa`and `SgtSe`
In a period I.E in general increases from left to right and therefore.
`ArgtS`and`SegtCa`
Hence correct order is
`BaltCaltSeltSltAr`
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