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. |
The disproportionation reaction of is as follows:
X and Y in the above reaction are:
1. H3PO2, HPO2
2. H3PO4, PH3
3. H2PO6, PO3
4. None of the above.
The correct increasing order of basic strength of hydrides:
1. BiH3 \(\simeq \) SbH3 < AsH3 < PH3 < NH3
2. BiH3 > NH3 > PH3 > SbH3 > AsH3
3. SbH3 < AsH3 < PH3 < NH3 < BiH3
4. AsH3 > NH3 > PH3 > SbH3 > BiH3
The correct structure of pyrophosphoric acid is:
1. | 2. | ||
3. | 4. |
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 |
An element that does not show allotropy is:
1. Nitrogen
2. Phosphorus
3. Antimony
4. Arsenic
A brown ring formed in the ring test for ion is due to the formation of:
1. [Fe(H2O)5(NO)]2+
2. FeSO4.NO2
3. [Fe(H2O)4(NO)2]2+
4. FeSO4.HNO3
Which of the following statements is correct?
1. | Only type of interactions between particles of noble gases are due to weak dispersion forces. |
2. | Ionisation enthalpy of molecular oxygen is very high as compared to xenon. |
3. | Hydrolysis of XeF6 is a redox reaction. |
4. | Xenon fluorides are not reactive. |
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 |
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