- 1(current)
Q. No.The IUPAC name and symbol for the element with atomic number 120 are respectively:
1. Unnilbium; Ubn
2. Unbinilium; Ubn
3. Ununbium; Uub
4. Unbinilium; Uub
| Statement A: | The elements Z = 117 belongs to chalcogen family and the electronic configuration would be [Rn] 5f146d107s27p4 |
| Statement B: | The element with Z = 120 belongs to Group 2 (alkaline earth metals), and the electronic configuration would be [Uuo]8s2 |
The correct option is:
| 1. | Statement A is correct, Statement B is wrong. |
| 2. | Statement A is wrong, Statement B is correct. |
| 3. | Both Statement A and Statement B are wrong. |
| 4. | Both Statement A and Statement B are correct. |
| Assertion (A): | In the 5th period of the Periodic Table 18 elements are present. |
| Reason (R): | When n = 5, l = 0, 1, 2, 3. The total number of orbitals available are 9. The maximum number of electrons that can be accommodated is 18. |
| 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. |
Arrange the following elements in increasing order of metallic character:
Si, Be, Mg, Na, P
1. P < Si < Be < Mg = Na.
2. P < Si > Be < Mg < Na
3. P > Si > Be >Mg > Na
4. P < Si < Be < Mg < Na.
The first ionization enthalpy (∆i H ) values of the third-period elements, Na, Mg, and Si are respectively 496, 737, and 786 kJ mol–1. The first ∆i H value for Al will be-
1. Less than 496 kJ mol–1
2. Less than 737 kJ mol–1
3. In between 737 kJ mol–1 and 786 kJ mol-1
4. Cannot predict
Correct statement among the following regarding P, S, Cl, F is :
| 1. | F has most negative electron gain enthalpy, and S has least negative electron gain enthalpy. |
| 2. | Cl has most negative electron gain enthalpy, and S has least negative electron gain enthalpy. |
| 3. | Cl has most negative electron gain enthalpy, and P has least negative electron gain enthalpy. |
| 4. | F has most negative electron gain enthalpy, and P has least negative electron gain enthalpy. |
The formula of a compound that is formed by the Aluminium and Sulphur is:
| 1. | AlS2 | 2. | Al2S3 |
| 3. | Al3S2 | 4. | Al3S4 |
The oxidation state and covalency of Al in [AlCl(H2O)5]2+ are respectively:
1. +3 and 3
2. +6 and 2
3. +3 and 6
4. +2 and 2
Consider the following reaction.
Na2O + H2O → A
Cl2O7 + H2O → B
The product A and B are respectively:
1. A is NaOH; and B is HOCl
2. A is NaH; and B is HOCl
3. A is NaH; and B is HClO2
4. A is NaOH; and B is HClO4
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Q. No.
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