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The first ionisation enthalpy of calcium...

The first ionisation enthalpy of calcium is greater than that of potassium because for calcium

A

the clectron is removed from s-subshell

B

the effective nuclear charge is higher

C

the electron is removed from a p-subshell

D

the removal of electron does not give noble gas configuration.

Text Solution

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The correct Answer is:
B
Higher the effective nuclear charge, greater is the ionisation enthalpy.
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