It is because inability of ns2 electrons of the valence shell to participate in bonding that
1. Sn2+ is reducing while Pb4+ is oxidising agent
2. Sn2+ is oxidising while Pb4+ is reducing agent
3. Sn2+ and Pb2+ are both oxidising and reducing agent
4. Sn4+ is reducing while Pb4+ is oxidising agent
The number of carbon atoms per unit cell of diamond unit cell is:-
1. 4
2. 8
3. 6
4. 1
Name the type of the structure of silicate in which one oxygen atom of [SiO4]4- is
shared?
1. Sheet silicate
2. Pyrosilicate
3. three dimensional silicate
4. Linear chain silicate
Which one of the following anions is present in chain structure silicates?
(a) (b)
(c) (d)
AlF3 is soluble in HF only in the presence of KF due to the formation of:
1. | K3[AlF3H3] | 2. | K3[AlF6] |
3. | AlH3 | 4. | K[AlF3H] |
The correct statement among the following is :
1. | Sn2+ is an oxidizing agent while Pb4+ is a reducing agent. |
2. | Sn2+ and Pb2+ both are oxidizing agents. |
3. | Sn4+ is a reducing agent while Pb4+ is an oxidizing agent. |
4. | Sn2+ is a reducing agent while Pb4+ is an oxidizing agent. |
An element that cannot form ion is-
1. | Ga | 2. | Al |
3. | B | 4. | In |
The correct order of atomic radii of the group 13 elements is-
1. B < Al < In < Ga < Tl
2. B < Al < Ga < In < Tl
3. B < Ga < Al < Tl < In
4. B < Ga < Al < In < Tl
In which of the following pairs, both the species are not isostructural?
1. \(\mathrm{SiCl}_4, \mathrm{PCl}_4^{+}\)
2. Diamond, silicon carbide
3. \(\mathrm{NH}_3, \mathrm{PH}_3\)
4. \(\mathrm{XeF}_4, \mathrm{XeO}_4\)
The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence?
1. Ga < ln < Al < Tl
2. Al < Ga < ln < Tl
3. Tl < ln < Ga < Al
4. ln < Tl < Ga < Al