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JEE Advanced 2016Paper 1

Exam: JEE Advanced
Year: 2016
Paper: Paper 1
Subject: Chemistry
Chapter: Classification of Elements and Periodicity in Properties

JEE Advanced 2016 · Paper 1 · Chemistry · Classification of Elements and Periodicity in Properties

The increasing order of atomic radii of the following group 13...

The increasing order of atomic radii of the following group

13

elements is

Options

A $Al < Ga < In < Tl$
B $Ga < Al < In < Tl$
C $Al < In < Ga < Tl$
D $Al < Ga < Tl < In$

Correct answer

B. $Ga < Al < In < Tl$

Step-by-step solution

The order of radius of

13th

group elements is

Ga < Al < In < Tl

.
Reason

⇒

Due to poor shielding effect of

d

-orbital, radius of

Ga

is smaller than

Al

.

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