- 1(current)
Q. No.The element having a greatest difference between its first and second ionization energies, is:
1. Ca
2. Sc
3. K
4. Ba
The correct representation of the first ionization enthalpy for
Ca, Ba, S, Se, and Ar in increasing order, among the following, is:
1. Ba < Ca < Se < S < Ar
2. Ca < Ba < S < Se < Ar
3. Ca < S < Ba < Se < Ar
4. S < Se < Ca < Ba < Ar
1. F < S < P < B
2. P < S < B < F
3. B < P < S < F
4. B < S < P < F
In which of the following arrangements the order is not according to the property indicated against it?
| 1. | Li < Na < K < Rb : Increasing metallic radius |
| 2. | I < Br < F < Cl: Increasing electron gain enthalpy (with negative sign) |
| 3. | B < C < N < O: Increasing first ionisation enthalpy |
| 4. | Al3+ < Mg2+ < Na+ < F- : Increasing ionic size |
Consider the elements Mg, Al, S, P, and Si, the correct increasing order of their first ionization enthalpy is:
1. Mg < Al < Si < S < P
2. Al < Mg < Si < S < P
3. Mg < Al < Si < P < S
4. Al < Mg < S < Si < P
| Assertion (A): |
As one moves from left to right in a period, the metallic character decreases while the non-metallic character increases. |
| Reason (R): |
This trend occurs because ionization enthalpy increases and electron gain enthalpy decreases when moving from left to right in a period. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | (A) is False but (R) is True. |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are True and (R) is not the correct explanation of (A). |
| Statement I: | The first ionization energy of Pb is greater than that of Sn. |
| Statement II: | The first ionization energy of Ge is greater than that of Si. |
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Statement I is incorrect but Statement II is correct. |
| List-I | List-II | ||
| (A) | Al3+ < Mg2+ < Na+ < F– | (I) | Ionisation Enthalpy |
| (B) | B < C < O < N | (II) | Metallic character |
| (C) | B < Al < Mg < K | (III) | Electronegativity |
| (D) | Si < P < S < Cl | (IV) | Ionic radii |
1. A-IV, B-I, C-III, D-II
2. A-II, B-III, C-IV, D-I
3. A-IV, B-I, C-II, D-III
4. A-III, B-IV, C-II, D-I
- 1(current)
Q. No.
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