Elements of group-15 form compounds in +5 oxidation state. However, bismuth forms only one well-characterized compound in +5 oxidation state. The compound is-
On heating ammonium dichromate and barium azide separately we get:
1. in both cases
2. with ammonium dichromate and with barium azide
3. with ammonium dichromate and with barium azide
4. with ammonium dichromate and with barium azide
In the preparation of , we get gas by catalytic oxidation of ammonia. The moles of NO produced by the oxidation of two moles of will be ......... .
1. 2
2. 3
3. 4
4. 6
The oxidation state of the central atom in the anion of the compound will be-
1. +3
2. +5
3. +1
4. -3
Which of the following is not tetrahedral in shape?
Which of the following are peroxoacids of sulphur?
Hot conc. acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following element is oxidised by conc. into two gaseous products?
1. Cu
2. S
3. C
4. Zn
A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When an excess of this gas reacts with an unstable trihalide is formed. In this process, the oxidation state of nitrogen changes from-
1. -3 to +3
2. -3 to 0
3. -3 to +5
4. 0 to -3
In the preparation of compounds of Xe, Bartlett had taken as a base compound. This is because:
1. | Both O2 and Xe have the same size. |
2. | Both O2 and Xe have the same electron gain enthalpy. |
3. | Both O2 and Xe have almost the same ionisation enthalpy. |
4. | Both Xe and O2 are gases. |
In solid-state, PCl5 exists as:
1. | Covalent solid. |
2. | Octahedral structure. |
3. | Ionic solid with [PCl6]+ octahedral and [PCl4]- tetrahedral. |
4. | Ionic solid with [PCl4]+ tetrahedral and [PCl6]- octahedral. |