Q. No.
In solid-state, PCl5 exists as:
1.
Covalent solid.
2.
Octahedral structure.
3.
Ionic solid with [PCl6]+ octahedral and [PCl4]- tetrahedral.
4.
Ionic solid with [PCl4]+ tetrahedral and [PCl6]- octahedral.
Reduction potentials of some ions are given below. Arrange them in decreasing order of oxidising power.
|
Ion |
|||
|
potential E- /V |
= 1.19V |
= 1.65V |
= 1.74V |
| 1. | \(\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-} \) |
| 2. | \(\mathrm{IO}_4^{-}>\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-} \) |
| 3. | \(\mathrm{BrO}_4^{-}>\mathrm{IO}_4^{-}>\mathrm{ClO}_4^{-} \) |
| 4. | \(\mathrm{BrO}_4^{-}>\mathrm{ClO}_4^{-}>\mathrm{IO}_4^{-}\) |
If chlorine gas is passed through a hot NaOH solution, two changes are observed in the oxidation number of chlorine during the reaction. These are ......... and .............
a. 0 to +5
b. 0 to +3
c. 0 to -1
d. 0 to +1
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Which of the following is correct for P4 molecule of white phosphorus?
a. It has 6 lone pairs of electrons
b. It has six P — P single bonds
c. It has three P — P single bonds
d. It has four lone pairs of electrons
Choose the correct option:
1. (a, b)
2. (b, c)
3. (c, d)
4. (b, d)
Which of the following statements are correct?
| a. | Among halogens, the radius ratio between iodine and fluorine is maximum. |
| b. | Leaving F — F bond, all halogens have weaker X — X bond than X — X' bond in interhalogens. |
| c. | Among interhalogen compounds a maximum number of atoms are present in iodine fluoride. |
| d. | Interhalogen compounds are more reactive than halogen compounds. |
1. a, b, and c
2. b, c, and d
3. a, c, and d
4. a, b, and d
Which of the following statements are correct for SO2 gas?
| a. | It acts as a bleaching agent in moist conditions. |
| b. | Its molecule has linear geometry. |
| c. | Its dilute solution is used as a disinfectant. |
| d. | It can be prepared by the reaction of dilute H2SO4 with metal sulphide. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, c)
Which of the following statements are correct?
| a. | All the three N – O bond lengths in HNO3 are equal. |
| b. | All P – Cl bond lengths in PCl5 molecule in the gaseous state are equal. |
| c. | P4 molecule in white phosphorus have angular strain therefore white phosphorus is very reactive. |
| d. | PCl5 is ionic in a solid-state in which cation is tetrahedral and the anion is octahedral. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following orders are correct as per the properties mentioned against each?
| Column I | Column II | ||
| (a) | As2O3 < SiO2 < P2O3 < SO2 | (i) | Acid strength. |
| (b) | AsH3 < PH3 < NH3 | (ii) | Enthalpy of vaporisation. |
| (c) | S < O < Cl < F | (iii) | More negative electron gain enthalpy. |
| (d) | H2O > H2S > H2Se > H2Te | (iv) | Thermal stability. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following statements are correct?
| a. | S — S bond is present in H2S2O6 |
| b. | In peroxosulphuric acid (H2SO5) sulphur is in +6 oxidation state |
| c. | Iron powder along with Al2O3 and K2O is used as a catalyst in the preparation of NH3 by Haber's process |
| d. | Change in enthalpy is positive for the preparation of SO3 by catalytic oxidation of SO2 |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
In which of the following reactions conc. H2SO4 is used as an oxidising reagent?
| a. | CaF2 + H2SO4 → CaSO4 + 2 HF |
| 2. | 2HI + H2SO4 → I2 + SO2 + 2H2O |
| 3. | Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O |
| 4. |
Choose the correct option:
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
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