Download books and chapters from book store.
Currently only available for.
CBSE

Chemistry

NEET Chemistry : The d-And-f-Block Elements

21.

The correct increasing order of ionic radii of the following Ce³⁺, La³⁺, Pm³⁺ and Yb³⁺ is

22.

It is because of inability of ns² electrons of the valence shell to participate in bonding that

23.

The Number of moles of KMnO₄ that will be needed to react with one mole of sulphite ion in acidic solution is:

24.

The reason for greater range of oxidation states in actinoids is attributed to

25.

Which one of the following ions is the most stable in aqueous solution?

26.

More the number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is:

more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
the lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
the greater metallic character of the lanthanoids than that of the corresponding actinoids
the greater metallic character of the lanthanoids than that of the corresponding actinoids

27.

The shape of gaseous SnCl₂ is

28.

Identify the incorrect statement among the following:

There is a decrease in the radii of the atoms or ions as one proceeds from La to Lu.
Lanthanoid contraction is the accumulation of successive shrinkages
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements
As a result of lanthanoid contraction, the properties of 4d series of the transition elements have no similarities with the 5d series of elements

29.

[CuCl₄]^2- exists while [CuI₄]^2- does not exist, because

30.

Name the gas that can readily decolourises acidified KMnO₄ solution

Do a good deed today
Refer a friend to Zigya