- 1(current)
Q. No.| 1. | \(\mathrm{I^- > I >I^+}\) (Radii) |
| 2. | \(\mathrm{I^- > I > I^+}\) (Ionisation energy) |
| 3. | \(\mathrm{Li^+}\) (aqueous) < \(\mathrm{Na^+}\) (aqueous) < \(\mathrm{K^+}\) (aqueous) (Radii) |
| 4. | \(\mathrm{F > Cl > Br > I}\) (Electron Affinity) |
| List I | List II (High value observed for) | ||
| A. | Ionisation potential | I. | Chlorine |
| B. | Electropositivity | II. | Caesium |
| C. | Electron affinity | III. | Helium |
| D. | Oxidation state | IV. | Fluorine |
| V. | Osmium |
1. A‐IV, B‐III, C‐II, D‐I
2. A‐III, B‐II, C‐I, D‐V
3. A‐I, B‐II, C‐III, D‐IV
4. A‐II, B‐I, C‐IV, D‐V
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 |
1. Ionization energy
2. Sublimation energy
3. Atomization energy
4. Electron affinity
Which order correctly represents the increasing order of electron gain enthalpy?
1. Al < O < C < Ca < F
2. Al < Ca < O < C < F
3. C < F < O < Al < Ca
4. Ca < Al < C < O < F
Given below are two statements:
| Assertion (A): | Electron gain enthalpy becomes less negative as we go down a group. |
| Reason (R): | The size of the atom increases on going down the group and the added electron would be farther from the nucleus. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
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1. Fluorine (F)
2. Chlorine (Cl)
3. Nitrogen (N)
4. Oxygen (O)
1. N
2. Be
3. He
4. All of the above
The first ionization enthalpy of sodium (Na) is 5.1eV. Using this information, determine the value of the electron gain enthalpy of \(\mathrm{Na^+}\):
1. +10.2 eV
2. –5.1 eV
3. –10.2 eV
4. +2.55 eV
To unlock all the explanations of this course, you need to be enrolled.
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- 1(current)
Q. No.
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