Q. No.Among the following reactions, N2 is not generated by heating:
1. (NH4)2Cr2O7
2. NH4Cl + NaNO2
3. NH4Cl + CaO
4. Ba(N3)2
The bleaching action of SO2 is due to its
1. Acidic property
2. Basic property
3. Reducing property
4. Oxidising property
| 1. | Melting point | 2. | Thermal stability |
| 3. | Boiling point | 4. | Critical temperature |
The false statement regarding hydrides from the 15th group is:
| 1. | NH3 > PH3 > AsH3 > SbH3 > BiH3 | Thermal stability |
| 2. | N-H > P-H > As-H > Sb-H > Bi-H | E-H bond dissociation enthalpy |
| 3. | NH3 > PH3 > AsH3 > SbH3 > BiH3 | Reducing character |
| 4. | NH3 > PH3 > AsH3 > SbH3 > BiH3 | Basicity |
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. |
Which of the following statements is false?
| 1. | H3PO2, H3PO3 and H3PO4 all are tribasic and reducing in nature. |
| 2. | Amongst anions \(NO_{3}^{-}\), \(SO_{3}^{2-}\), \(CO_{3}^{2-}\), and \(BO_{3}^{3-}\), only \(SO_{3}^{2-}\) have pπ-dπ bonding . |
| 3. | Amongst anions \(SO_{3}^{2-}\), \(SO_{4}^{2-}\), \(S_{2}O_{4}^{2-}\) and \(HSO_{4}^{-}\), \(SO_{3}^{2-}\) is basic and reducing in nature. |
| 4. | Number of lone pair(s) of electrons on Xe atoms in XeF2, XeF4 and XeF6 are 3, 2 and 1 respectively._ |
| Column-I | Column-II | ||
| (A) | XX’ | (i) | T-shape |
| (B) | XX’3 | (ii) | Pentagonal bipyramidal |
| (C) | XX’5 | (iii) | Linear |
| (D) | XX’7 | (iv) | Square Pyramidal |
| (A) | (B) | (C) | (D) | |
| 1. | (iii) | (i) | (iv) | (ii) |
| 2. | (i) | (iv) | (iii) | (ii) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (iii) | (iv) | (i) | (ii) |
The strong reducing behaviour of H3PO2 is due to:
1. Presence of one -OH group and two P-H bonds.
2. High electron gain enthalpy of phosphorus.
3. High oxidation state of phosphorus.
4. Presence of two -OH groups and one P-H bond.
The acidity of diprotic acids in aqueous solution increases in the order:
1. H2S < H2Se < H2Te
2. H2Se < H2S < H2Te
3. H2Te < H2S < H2Se
4. H2Se < H2Te < H2S
Match the name of process given in Column I with the name of compound given in Column II and mark the correct option.
| Column I | Column II | ||
| (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) |
© 2025 GoodEd Technologies Pvt. Ltd.