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Q.

Assertion(A): In modern periodic table, ionization enthalpy decreases for group ‘1’ elements going down the group Reason(R): Screening effect increases moving down the group

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a

Both A and R are true and R is the correct explanation of A

b

Both A and R are true and R is not the correct explanation of A

c

A is true, But R is false

d

A is false, But R is true

answer is A.

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Detailed Solution

Moving down the group, electron enters into a new shell…screening effect increases….attraction of outermost electron from nucleus decreases. IP decreases.
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