Which of the following is true about reactivity of group 15 elements?
1. Stability of their hydrides increases down the group.
2. Higher oxides are acidic in nature.
3. All elements form pentahalides.
4. They do not react with metals.
The element from group 15 that forms a strong bond with hydrogen is:
1. | N | 2. | P |
3. | As | 4. | Sb |
The condition that does not exist in the Haber process
for the manufacturing of ammonia is:
1. Pressure (around 200 ×105 Pa)
2. Temperature (700 K)
3. Catalyst such as iron oxide.
4. Presence of inert gases.
An element that does not have a d-orbital is:
1. | P | 2. | N |
3. | As | 4. | Bi |
The least basic compound is:
1. BiH3
2. AsH3
3. PH3
4. NH3
Incorrect statement about red phosphorus is:
1. It is hard and crystalline.
2. It is poisonous.
3. It is less reactive than white phosphorus.
4. It is insoluble in water.
Which element exhibits the highest catenation property?
1. Phosphorus
2. Nitrogen
3. Antimony
4. Bismuth
PCl5 acts as
1. Reducing agent
2. Oxidising agent
3. Dehydrating Agent
4. None of the above.
The electron gain enthalpy values for O → O– and O → O2– are –141 and 702 kJ mol-1 , respectively. The correct statement about the formation of oxides is-
1. | Higher the electron gain enthalpy lower is the lattice energy. |
2. | Higher the electron gain enthalpy higher is the lattice energy. |
3. | Higher the electron gain enthalpy higher is the stability of oxide. |
4. | O- is more stable than O2- |
\(\mathrm{Xe}+\mathrm{PtF}_6 \rightarrow \text { ? }\)
The product of the above reaction is:
1. | \(\mathrm{O}_2{ }^{+}\left[\mathrm{PtF}_6\right]^{-}. \) | 2. | \(\mathrm{XeF}_4 \) |
3. | \(\mathrm{XeF}_6 \) | 4. | \(\mathrm{Xe}^{+}\left[\mathrm{PtF}_6\right]^{-}\) |