The number of \(\mathrm{S=O}\) bonds present in \(\mathrm{H}_2\mathrm{S}_2 \mathrm{O}_8\) is:
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Incorrect order among the following is:
1. | F2 > Cl2 > Br2 > I2 | Oxidising power |
2. | F < Cl > Br > I | Electron gain enthalpy |
3. | F2 > Cl2 > Br2 > I2 | Bond dissociation energy |
4. | F> Cl > Br > I | Electronegativity |
The respective oxidation states of P in H4P2O5, H4P2O6, and H4P2O7 are:
1. | +3, +5, and +4 | 2. | +5, +3, and +4 |
3. | +5, +4, and +3 | 4. | +3, +4, and +5 |
The compound among the following with the lowest pKa value is?
1. H2O
2. H2S
3. H2Se
4. H2Te
Nitrogen gas is liberated by the thermal decomposition of:
1.
2.
3.
4. All of the above.
A solid (A) reacts with strong aqueous NaOH, liberating a foul smelling gas (B), which spontaneously burns in the air, giving smoky rings. A and B are, respectively:
1. P4 (red) and PH3
2. P4 (white) and PH3
3. S8 and H2S
4. P4 (white) and H2S
Among the following molecules,
(i)
(ii)
(iii)
Those having the same number of lone pairs on Xe are
1. (i) and (ii) only
2. (i) and (iii) only
3. (ii) and (iii) only
4. (i), (ii) and (iii) only
What order does the stability of interhalogen compounds follow?
1. IF3 > BrF3 > CIF3
2. BrF3 > IF3 > ClF3
3. ClF3 > BrF3 > IF3
4. ClF3 > IF3 > BrF3
The molecular shapes of SF4, CF4 and XeF4 are:
1. | The same with 2, 0 and 1 lone pairs of electrons on the central atoms, respectively |
2. | The same with 1, 1 and 1 lone pairs of electrons on the central atoms, respectively |
3. | Different with 0, 1 and 2 lone pairs of electrons on the central atoms, respectively |
4. | Different with 1, 0 and 2 lone pairs of electrons on the central atoms, respectively |
Which of the following liquids has the ability to climb the glass vessel's wall?
1. Alcohol
2. Liquid He
3. Liquid
4. Water