Valency is best described as:
1. Total electrons in an atom
2. Atomicity of an element
3. Oxidation number of an element
4. Combining capacity of an element
Compounds that have a maximum value of lattice energy among the following, is:
| 1. | NaF | 2. | NaCl |
| 3. | NaBr | 4. | NaI |
A compound with maximum ionic character is formed from which of the following pairs?
| 1. | Na and I | 2. | Cs and F |
| 3. | Cs and I | 4. | Na and F |
The crystal lattice of electrovalent compound is composed of :
1. Atoms
2. Molecules
3. Oppositely charged ions
4. Both molecules and ions
Ions are formed from neutral atoms by-
1. Loss of electrons
2. Gain of electrons
3. Sharing of electrons
4. Loss and gain of electrons
Which among the following is the most covalent compound?
| 1. | AlF3 | 2. | AlCl3 |
| 3. | AlBr3 | 4. | AlI3 |
The correct order of covalent bond character among
LiCl, BeCl2, BCl3 and CCl4, is:
1. LiCl < BeCl2 > BCl3 > CCl4
2. LiCl > BeCl2 < BCl3 < CCl4
3. LiCl < BeCl2 < BCl3 < CCl4
4. LiCl > BeCl2 > BCl3 > CCl4
Which follows octet rule-
1. FeCl2
2. AgCl
3. CaCl2
4. CuCl
The type of bonds present in N2O5 are-
1. Only covalent
2. Only ionic
3. Ionic and covalent
4. Covalent and coordinate
Which of the following is not true according to VBT?
| 1. | A covalent bond is formed by the overlapping of orbitals with unpaired electrons of opposite spins. |
| 2. | A covalent bond is formed by the overlapping of orbitals with unpaired electrons of same spin. |
| 3. | The greater the extent of overlapping the stronger is the bond. |
| 4. | Overlapping takes place only in the direction of maximum electron density of the orbital. |