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

Subtopic:  Modern Periodic Table & Periodicity |
 86%
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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, B is wrong.
2. Statement A is wrong, B is correct
3. Both A and B are wrong.
4. Both A and B are correct




 

Subtopic:  Modern Periodic Table & Periodicity |
 64%
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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.


 

Subtopic:  Modern Periodic Table & Periodicity |
 55%
From NCERT
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The correct increasing order of metallic character among' the following elements is:

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.

Subtopic:  Modern Periodic Table & Periodicity |
 71%
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The first ionization enthalpy (i ) 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

 

Subtopic:  Ionization Energy (IE) |
 58%
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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.


 

Subtopic:  Electron Affinity (EA) |
 70%
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The formula of a compound that is formed by the aluminium and sulphur is-

1.  AlS2
2.  Al2S3
3.  Al3S2
4.  Al3S4

Subtopic:  Nature of Compound |
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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 

Subtopic:  Nature of Compound |
 79%
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Consider the following reaction.
Na
2O + H2 A
Cl
2O7 + H2 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

Subtopic:  Nature of Compound |
 74%
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