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Q. No.

The element having a greatest difference between its first and second ionization energies, is:

1.  Ca 

2.  Sc

3.  K 

4.  Ba  

Subtopic:  Ionization Energy (IE) |
 78%
Level 2: 60%+
JEE
Hints
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.
Subtopic:  Modern Periodic Table & Periodicity |
 65%
Level 2: 60%+
Hints

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.

Subtopic:  Modern Periodic Table & Periodicity |
 71%
Level 2: 60%+
Hints
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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 |
 80%
Level 1: 80%+
Hints

The term(s), that does not have a unit among the following, is/are:

(a) Electronegativity

(b) Electron gain enthalpy

(c) Ionization enthalpy

(d) Metallic character

Choose the correct option:

1. (a), (d)

2. (b), (c)

3. (c), (d)

4. (b), (d)

Subtopic:  Electronegativity |
 86%
Level 1: 80%+
Hints

Among the following sequences, the sequence contains atomic numbers of only representative elements is/are:

(a) 3, 33, 53, 87 (b) 2, 10, 22, 36
(c) 7, 17, 25, 37, 48 (d) 9, 35, 51, 88

Choose the correct option:
1. (a), (d)
2. (b), (c)
3. (c), (d)
4. (b), (d)

Subtopic:  Modern Periodic Table & Periodicity |
 67%
Level 2: 60%+
Hints
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If an atom has electronic configuration 1s22s22p63s23p63d34s2, we will place it in group number:

1. Fifth 2. Fifteenth
3. Second 4. Third
Subtopic:  Electronic Configuration |
 69%
Level 2: 60%+
AIPMT - 2002
Hints

Which of the following oxides is the most basic in nature?

1. Bi2O3 

2. Bi2O5 

3. As2O3 

4. Sb2O5 

Subtopic:  Nature of Compound |
 60%
Level 2: 60%+
Hints
From the given pairs below, the pair in which both elements have the same electronegativity is:
1. O and Cl  2. N and Cl 
3. N and Br  4. C and Br 
Subtopic:  Electronegativity |
 61%
Level 2: 60%+
Hints
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Given below are two statements: 
Assertion (A): Generally, ionisation enthalpy increases from left to right in a period.
Reason (R): When successive electrons are added to the orbitals in the same principal quantum level, the shielding effect of inner core of electrons does not increase very much to compensate for the increased attraction of the electron to 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.

Subtopic:  Ionization Energy (IE) | Electron Affinity (EA) |
 75%
Level 2: 60%+
Hints
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