- 1(current)
Q. No.Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is-
| 1. | F > Cl > Br > I | 2. | F < Cl < Br < I |
| 3. | F < Cl > Br > I | 4. | F < Cl < Br > I |
The correct order of increasing electron gain enthalpy with a negative sign for the elements O, S, F, and Cl is :
1. Cl < F < S < O
2. O < S < F < Cl
3. F < S < O < Cl
4. S < O < Cl < F
The incorrect match among the following is:
1. B < C < N < O (increasing first ionisation enthalpy)
2. I < Br < F < Cl (increasing electron gain enthalpy)
3. Li < Na < K < Rb (increasing metallic radius)
4. Al3+ < Mg2+ < Na+ <F- (increasing ionic size)
An element with higher negative electron gain enthalpy in the given pair is-
(i) O or F (ii) F or Cl
| 1. | O, Cl | 2. | F, F |
| 3. | O, F | 4. | F, Cl |
Element of the third period that is expected to exhibit positive electron gain enthalpy is:
| 1. | Na | 2. | Al |
| 3. | Cl | 4. | Ar |
The group of metals having positive value of electron gain enthalpy is :-
| 1. | Cr, Fe | 2. | Mn, Zn |
| 3. | Fe, Zn | 4. | Cr, Mn |
The basic difference between the electron gain enthalpy (Ea) and electronegativity (EN) is -
| 1. | Ea is the tendency to lose electrons, while EN is the tendency to repel the shared pairs of electrons. |
| 2. | Ea is the tendency to gain neutrons, while EN is the tendency to attract the shared pairs of electrons. |
| 3. | Ea is the tendency to donate electrons, while EN is the tendency to attract the shared pairs of molecules. |
| 4. | Ea is the tendency to gain electrons, while EN is the tendency to attract the shared pairs of electrons. |
- 1(current)
Q. No.
© 2024 GoodEd Technologies Pvt. Ltd.