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Q.

Correct among the following
a) All transition elements are d - block elements

b) All d-block elements are transition elements

c) Helium is a inert gas 

d) Aluminium is a respresentative element

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a

a and c

b

b, c and d

c

a, c and d

d

all

answer is B.

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Detailed Solution

A transition metal is one that forms one or more stable ions which have incompletely filled d orbitals.

Hence, Zn , Cd & Hg are not transition elements but d-block elements.

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