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Class XII Chemistry d and f Block Elements Quiz 3

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Question 1

Ce³⁺, La³⁺, Pm³⁺ and Yb³⁺ have ionic radii in the increasing order as:

Question 2

Lanthanide contraction is related with -

Question 3

The black compound formed during the reaction between sodium thiosulphate and silver nitrate is

Question 4

Zinc-copper couple that can be used as a reducing agent is obtained by

Question 5

The equivalent weight of MnSO₄ is half of its molecular weight when its converted to

Question 6

Which of the following statement is correct when a mixture of NaCl and K₂Cr ₂O₇ is gently warmed with sulphuric acid?
1) Deep red vapours are evolved
2) The vapours when passed into NaOH solution give yellow solution of Na₂CrO₄
3) Chlorine gas is evolved
4) Chromyl chloride is formed

Question 7

The product formed on oxidation of I^- with MnO₄^- in alkaline medium is

Question 8

In nitroprusside ion, the iron and NO exist as Fe²⁺ and NO⁺ rather than Fe⁺³ and NO. These forms can be differentiated by

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Aug 13JEE & BITSAT