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The following are some statements about
transition elements
i) IIB group belong to transition elements
ii) In these elements last two shells ns and
(n-1)d are partially filled
iii) They show variable valencies

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only iii is correct

only i & ii are correct

all are correct

ii, iii are correct

answer is C.

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Detailed Solution

We know that transition elements lie between IIA and IIIA.

Hence, Statement 1 is incorrect.

Now, In transition elements last two shells ns and (n-1)d are partially filled

Hence, Statement 2 is correct.

Now, Transition elements show variable valencies due to partially filled electrons.

Hence, statement 3 is correct.

Therefore, only Statement 2 and 3 is correct.

Hence, option(c) is the answer.

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