on complete hydrolysis forms:
1.
2.
3.
4. None of the above.
The percentage of lead in a lead pencil is-
1. 20
2. 0
3. 80
4. 70
Tin cry refers to-
1. Conversion of white to grey tin
2. Tin plating
3. Conversion of white tetrahedral tin to white rhombohedral tin
4. Emission of sound while bending a tin rod
The correct statement regarding polymeric silicon dioxide is -
1. | Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms. |
2. | Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms. |
3. | Silicon atom is bonded to two oxygen atoms. |
4. | These are double bonds between silicon and oxygen atoms. |
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
A compound among the following having a similar structure to graphite is:
1. B
2. B4C
3. B2H6
4. BN
A compound among the following that is least likely to behave as a Lewis base is:
1. | NH3 | 2. | BF3 |
3. | OH- | 4. | H2O |