Q. No.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
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
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
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. | The overlapping of orbitals with unpaired electrons of opposite spins forms a covalent bond. |
| 2. | The overlapping of orbitals with unpaired electrons of the same spin forms a covalent bond. |
| 3. | The greater the extent of overlapping, the stronger the bond. |
| 4. | Overlapping takes place only in the direction of the maximum electron density of the orbital. |
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