Q.

Which has the largest first ionisation energy?

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a

Na

b

K

c

Rb

d

Li

answer is D.

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Detailed Solution

IE1 decreases down the group 1 elements.So IE1 of Li is high in group 1 elements.
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Get ₹ 1 crore* worth scholarship for JEE / NEET / Foundation
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Best Books for NEET
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