Q. No.PH3 forms bubbles when passed slowly through water but NH3 gets dissolved in water, because:
| 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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The bonding present in nitrogen molecules is:
1. \(p\pi-p\pi\)
2. \(p\pi-d\pi\)
3. \(d\pi-d\pi\)
4. Only sigma bond
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
NH3 forms a hydrogen bond but PH3 does not because:
| 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. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Match the name of process given in column I with the name of compound given in
column II and mark the correct option.
| (a) Pure nitrogen | (i) Chlorine |
| (b) Haber process | (ii) Sulphuric acid |
| (c) Contact process | (iii) Ammonia |
| (d) Deacon's process | (iv) Sodium azide or Barium azide |
| (a) | (b) | (c) | (d) | |
| 1. | (iv) | (iii) | (ii) | (i) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (ii) | (iv) | (i) | (iii) |
| 4. | (iii) | (iv) | (ii) | (i) |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
Match the formulas of oxides given in Column I with the type of oxide given in Column II and mark the correct option.
| Column I | Column II |
| A. Pb3O4 | 1. Neutral oxide |
| B. N2O | 2. Acidic oxide |
| C. Mn2O7 | 3. Basic oxide |
| D. Bi2O3 | 4. Mixed oxide |
Codes
| A | B | C | D | |
| 1. | 1 | 2 | 3 | 4 |
| 2. | 4 | 1 | 2 | 3 |
| 3. | 3 | 2 | 4 | 1 |
| 4. | 4 | 3 | 1 | 2 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
The respective oxidation states of P in H4P2O5, H4P2O6, and H4P2O7 are:
| 1. | +3, +5, and +4 | 2. | +5, +3, and +4 |
| 3. | +5, +4, and +3 | 4. | +3, +4, and +5 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
A balanced chemical equation for the reaction showing catalytic oxidation of NH3 by atmospheric oxygen is:
| 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 |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
A brown-coloured mixture of two gases is obtained by reducing 6 N nitric acid with metallic copper. This mixture on cooling condenses to a blue liquid which on freezing (-30 oC) gives a blue solid. The correct statement for the blue liquid or solid is:
| 1. | It is referred to as the anhydride of nitrous acid. |
| 2. | It is an acidic oxide. Hence, it dissolves in alkalies producing nitrites. |
| 3. | It can also be prepared by the action of 50 % HNO3 on arsenious oxide and then cooling to 250 K. |
| 4. | All of the above. |
To unlock all the explanations of this course, you need to be enrolled.
To unlock all the explanations of this course, you need to be enrolled.
© 2024 GoodEd Technologies Pvt. Ltd.