General
✓✗Down group 16, the metallic character
- first decreases and then increases
- remains the same
- decreases
- increases
General
✓✗Interhalogen compounds are generally
- ionic solids only
- more reactive than the halogens (except fluorine)
- completely unreactive
- less reactive than all the halogens
General
✓✗Among the group 15 elements, only nitrogen cannot form pentahalides (EX5) because
- it has a low ionisation enthalpy
- it is too large
- it is a metal
- it has no vacant d orbitals in its valence shell
General
✓✗Match List I (atom/molecule) with List II (property).
Choose the correct answer from the options given below.
| List I | List II |
| A. Nitrogen atom | I. Paramagnetic |
| B. Fluorine molecule | II. Most reactive element in group 18 |
| C. Oxygen molecule | III. Element with the highest ionisation enthalpy in group 15 |
| D. Xenon atom | IV. Strongest oxidising agent |
- A-III, B-I, C-IV, D-II
- A-I, B-IV, C-III, D-II
- A-II, B-IV, C-I, D-III
- A-III, B-IV, C-I, D-II
General
✓✗Down group 18, the boiling point
- remains constant
- first decreases and then increases
- increases
- decreases
General
✓✗Which statement about polonium is correct?
- It is a non-metal
- It shows only the −2 oxidation state
- It is a gas at room temperature
- It is a radioactive metal
General
✓✗Statement I: NCl5 does not exist.
Statement II: N2 is more reactive than P4.
Statement II: N2 is more reactive than P4.
- Both Statement I and Statement II are correct
- Both Statement I and Statement II are incorrect
- Statement I is correct but Statement II is incorrect
- Statement I is incorrect but Statement II is correct
General
✓✗The two O−O bonds in ozone are
- unequal, one single and one double
- both triple bonds
- equal in length, because of resonance
- both pure single bonds
General
✓✗The general valence shell electronic configuration of the halogens is
- ns1
- ns2 np4
- ns2 np5
- ns2 np6
General
✓✗Down group 16, the first ionisation enthalpy
- increases
- decreases
- increases and then decreases
- remains constant
General
✓✗Oxygen exists as O2 whereas sulphur exists as S8 because
- sulphur is more electronegative
- sulphur cannot form any covalent bonds
- oxygen has d orbitals
- oxygen forms strong pπ−pπ bonds, but sulphur prefers single bonds and catenation
General
✓✗Sulphur trioxide can be obtained by which of the following reactions?
- Heating H2SO4 with PCl5
- Heating Fe2(SO4)3
- Heating CaSO4 with carbon
- Heating sulphur with H2SO4
General
✓✗In NH3 the bond angle is 107.8°, but in PH3 it is about 93.6°. This is because
- PH3 has two lone pairs
- N is larger than P
- in PH3 the bonds use almost pure p orbitals of the larger, less electronegative P
- PH3 is planar
General
✓✗Which noble gas is used in filling airships and weather balloons?
- Helium
- Radon
- Argon
- Neon
General
✓✗How many bridging oxygen atoms are present in P4O10?
- 4
- 6
- 5
- 2