Q. No.Which of the following Group 15 elements forms the strongest bond with hydrogen?
| 1. | N | 2. | P |
| 3. | As | 4. | Sb |
Which of the following correctly explains why NH₃ is highly soluble in water, whereas PH₃ is only sparingly soluble?
| 1. | NH3 forms an H-bond with water, so it is soluble but PH3 does not form an H-bond. |
| 2. | NH3 does not form an H-bond with water, so it is soluble but PH3 does form an H-bond. |
| 3. | NH3 and PH3 both form H-bond with water. |
| 4. | NH3 and PH3 both do not form H-bond with water. |
Which of the following types of π-bonding is present in the N₂ molecule?
1. \(p\pi-p\pi\)
2. \(p\pi-d\pi\)
3. \(d\pi-d\pi\)
4. Only sigma bond
Which of the following Group 15 elements does not have a d-orbital in its valence shell?
| 1. | P | 2. | N |
| 3. | As | 4. | Bi |
Which of the following correctly explains why NH₃ forms hydrogen bonds whereas PH₃ does not?
| 1. | Phosphorus is more electronegative as compared to nitrogen. |
| 2. | Nitrogen is more electronegative as compared to phosphorus. |
| 3. | Nitrogen and phosphorous have equal electronegativity. |
| 4. | Nitrogen is more stable as compared to phosphorus. |
Which of the following equations correctly represents the catalytic oxidation of ammonia by atmospheric oxygen ?
| 1. | 4NH3 + \(\underset{\text{From air}}{5O_2} \) \(\xrightarrow[\text{500 K; 9 bar}]{\text{Pt / Rh gauge catalyst}}\) 4NO + 6H2O |
| 2. | 3NH4 + \(\underset{\text{From air}}{5O_2} \) \(\xrightarrow[\text{500 K; 9 bar}]{\text{Pt / Rh gauge catalyst}}\) 3NO + 6H2O |
| 3. | 4NH3 + \(\underset{\text{From air}}{5O_2} \) \(\xrightarrow[\text{cold}]{\text{no catalyst}}\) 4NO + 6H2O |
| 4. | 3NH4 + \(\underset{\text{From air}}{5O_2} \) \(\xrightarrow[\text{cold}]{\text{no catalyst}}\) 3NO + 6H2O |
Which of the following is the correct electronic configuration of the element belonging to Group 15 and Period 3 of the periodic table?
1. \(\mathrm{1 s^2 2 s^2 2 p^4} \)
2. \(\mathrm{1 s^2 2 s^2 2 p^3} \)
3. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^2} \)
4. \(\mathrm{1 s^2 2 s^2 2 p^6 3 s^2 3 p^3}\)
Which of the following compounds liberates nitrogen gas on thermal decomposition?
1.
2.
3.
4. All of the above.
Which of the following correctly represents the gaseous products formed on heating ammonium dichromate and barium azide, respectively?
| 1. | N2 in both cases. |
| 2. | N2 with ammonium dichromate and NO with barium azide. |
| 3. | N2O with ammonium dichromate and N2 with barium azide. |
| 4. | N2O with ammonium dichromate and NO2 with barium azide. |
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