An element X is placed in group IA of the periodic table because it forms:
1. An oxide which is acid
2. A volatile chloride having formula XCl2
3. An ionic chloride having formula XCl
4. An insoluble chloride XCl4
The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and Cl- will be
1. reduced to in water than in air
2. reduced to in water than in air
3. will be increased to 80 in water than in air
4. will remain unchanged
Which pair of atom form strongest ionic bond?
(1) Al and As
(2) Al and N
(3) Al and Se
(4) AL and O
Which of the following pair of elements can form an ionic compound?
| 1. | \(\mathrm{Na}\) and \(\mathrm{Ca}\) | 2. | \(\mathrm{K}\) and \(O_2\) |
| 3. | \(O_2\) and \(Cl_2\) | 4. | \(Al\) and \(I_2\) |
A Compound with maximum ionic character is formed from:
| 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 decreasing order of ionic character of the N-H, F-H, C-H, and O-H, is :
| 1. | N-H > F-H > C-H > O-H |
| 2. | F-H > N-H > C-H > O-H |
| 3. | O-H > C-H > F-H > N-H |
| 4. | F-H > O-H > N-H > C-H |
The right order of increase in the ionic character of the molecules,
LiF, K2O, N2, SO2, ClF3 is :
1. N2 < SO2 < ClF3 < K2O < LiF
2. N2 > SO2 > ClF3 > K2O < LiF
3. N2 > SO2 > ClF3 > K2O > LiF
4. LiF > K2O < ClF3 > SO2 > N2
The favourable factors for the formation of an ionic bond would be:
| 1. | Low ionization enthalpy, High negative electron gain enthalpy, High lattice energy. |
| 2. | High ionization enthalpy, High electron gain enthalpy, High lattice energy. |
| 3. | Low ionization enthalpy, Low electron gain enthalpy, Low lattice energy. |
| 4. | High ionization enthalpy, Low electron gain enthalpy, High lattice energy. |
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