Which of the following is true regarding the P4 molecule of white phosphorus?
1. It has 6 lone pairs of electrons.
2. It has four P — P single bonds.
3. It has three P — P single bonds.
4. It has four lone pairs of electrons.
The correct statement among the following about SO2 gas is:
1. | It acts as bleaching agent in moist conditions. |
2. | It's molecule has linear geometry. |
3. | It's concentrated solution is used as a disinfectant. |
4. | It can be prepared by the reaction of dilute H2SO4 with metal sulphide. |
Which of the following statements is true?
1. | All three N – O bond lengths in HNO3 are equal. |
2. | All P – Cl bond lengths in PCl5 molecule in gaseous state are equal. |
3. | P4 molecules in white phosphorus have angular strain. Therefore, white phosphorus is very reactive. |
4. | PCl5 is ionic in a solid state in which the anion is tetrahedral and the cation is octahedral. |
Which of the following is the correct match?
1. As2O3 < SiO2 < P2O3 < SO2 - Basic strength.
2. AsH3 < PH3 < NH3 - Enthalpy of vaporisation.
3. S < O < Cl < F - More negative electron gain enthalpy
4. H2O > H2S > H2Se > H2Te - Thermal stability
Which of the following statements is true?
1. | S — S bond is present in H2S2O6 |
2. | In peroxosulphuric acid (H2SO5) sulphur is in +5 oxidation state. |
3. | Iron powder, along with Al2O3 and K2O, is used as a catalyst in the preparation of NH3 by Haber's process. |
4. | Change in enthalpy is positive for the preparation of SO3 by catalytic oxidation of SO2 |
a. \(\mathrm{CaF}_2+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CaSO}_4+2 \mathrm{HF}
\)
b. \(2 \mathrm{HI}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{I}_2+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}
\)
c. \(\mathrm{Cu}+2 \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{CuSO}_4+\mathrm{SO}_2+2 \mathrm{H}_2 \mathrm{O}
\)
d. \(\mathrm{NaCl}+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{NaHSO}_4+\mathrm{HCl}\)
In which of the above-mentioned reactions does conc. \(\mathrm{H}_2 \mathrm{SO}_4\) act as an oxidising reagent?
1. | a and b | 2. | b and c |
3. | c and d | 4. | a and d |
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 |
Match the species given in Column I with the shape given in Column II and mark the correct option.
Column I | Column II | ||
A | Its partial hydrolysis does not change oxidation state of central atom. | 1 | He |
B | It is used in modern diving apparatus. | 2 | XeF6 |
C | It is used to provide inert atmosphere for filling electrical bulbs. | 3 | XeF4 |
D | It's central atom is in sp3d2 hybridisation. | 4 | Ar |
Codes
A | B | C | D | |
1. | 1 | 4 | 2 | 3 |
2. | 1 | 2 | 3 | 4 |
3. | 2 | 1 | 4 | 3 |
4. | 1 | 3 | 2 | 4 |
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