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, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, 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. |
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) |
Which of the following statements is/are true?
a. | Only types of interactions between particles of noble gases are due to weak dispersion forces. |
b. | The ionization enthalpy of molecular oxygen is very close to that of xenon. |
c. | Hydrolysis of XeF6 is a redox reaction. |
d. | Xenon fluorides are not reactive. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Match the compounds given in Column I with the hybridisation and shape given in Column II and mark the correct option.
Column I | Column II | ||
A | XeF6 | 1. | sp3d3 distorted octahedral |
B. | XeO3 | 2. | sp3d2 square planar |
C. | XeOF4 | 3. | sp3 pyramidal |
D. | XeF4 | 4. | sp3d2 square pyramidal |
Codes:
Options: | A | B | C | D |
1. | 1 | 3 | 4 | 2 |
2. | 1 | 2 | 4 | 3 |
3. | 4 | 3 | 1 | 2 |
4. | 4 | 1 | 2 | 3 |