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 |
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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 |
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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 assertion and reason are true, and reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.

Subtopic:  Modern Periodic Table & Periodicity |
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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 |
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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) |
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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) |
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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 |
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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 |
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