1. | The oxidation state and coordination number (or covalency) of \(\mathrm{Al}\) in\( \left[\mathrm{AlCl}\left(\mathrm{H}_2 \mathrm{O}\right)_5\right]^{2+} \) are +3 and 6, respectively. |
2. | \(\mathrm{Na}_2 \mathrm{O}\) is a basic oxide and \(\mathrm{Cl}_2 \mathrm{O}_7\) is an acidic oxide |
3. | The following four species are called isoelectronic species: \( \mathrm{O}^{2-}, \mathrm{F}^{-}, \mathrm{Na}^{+} \mathrm{and}~ \mathrm{Mg}^{2+}\) |
4. | Among the four species \(\mathrm{Mg}, \mathrm{Al}, \mathrm{Mg}^{2+}\) and \(\mathrm{A l^{3+},}\) the smallest one is \(\mathrm{Al}.\) |
List-I (IUPAC official name) |
List-II (IUPAC Symbol) |
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A. | Mendelevium | I. | Mt |
B. | Meitnerium | II. | Mc |
C. | Moscovium | III. | No |
D. | Nobelium | IV. | Md |
1. | Na | 2. | O |
3. | F | 4. | N |
1. | NO, ZnO, CO2, CaO | 2. | ZnO, NO, CaO, CO2 |
3. | NO, CO2, ZnO, CaO | 4. | NO, CO2, CaO, ZnO |
Match List-I with List-II:
List-I Elements |
List-II Atomic radii (pm) |
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(a) | O | (i) | 88 |
(b) | C | (ii) | 74 |
(c) | B | (iii) | 66 |
(d) | N | (iv) | 77 |
(a) | (b) | (c) | (d) | |
1. | (ii) | (i) | (iv) | (iii) |
2. | (iv) | (iii) | (ii) | (i) |
3. | (i) | (iv) | (iii) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |