The difference between ions and atoms is of:

1. relative size

2. Configuration

3. presence of charge

4. All of these

Subtopic:  Modern Periodic Table & Periodicity |
 87%
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The expected trend of change in atomic radius down the group is:

1. Continuous decrease

2. Continuous increase

3. Periodic one, an increase followed by a decrease

4. Periodic one, a decrease followed by an increase

Subtopic:  Atomic Size |
 86%
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An element R forms the highest oxide R2O5. R belongs to:

1. 13th  group

2. 15th group

3. 16 th group

4. 2nd group

Subtopic:  Nature of Compound |
 73%
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Amongst the following electronic configurations, the highest ionization energy
is represented by:

1. [Ne]3s23p3

2. [Ne]3s23p2

3. [Ar]3d104s24p3

4. [Ne]3s23p1

Subtopic:  Ionization Energy (IE) |
 68%
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Which pair of elements is chemically most similar?

1. Na, Al

2. Cu, S

3. Ti, Zr

4. Zr, Hf

Subtopic:  Nature of Compound |
 73%
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In the transition elements, the incoming electron occupies (n-1)d sublevel in preference to:

1. np

2. ns

3. (n-1)d

4. (n+1)s

Subtopic:  Electronic Configuration |
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The electronegativity of elements from group 1 to group 17 :

1. Decreases

2. Increases

3. Remains constant

4. All of the above

Subtopic:  Screening Effect |
 84%
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The electronic configuration of the most electropositive element is :

1. [He]2s1

2. [Xe]6s1

3. [He]2s2

4. [Xe]6s2

Subtopic:  Modern Periodic Table & Periodicity | Electronic Configuration |
 58%
From NCERT
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Which one of the following is an amphoteric oxide?

1. SO2

2. B2O3

3. ZnO

4. Na2O

Subtopic:  Nature of Compound |
 58%
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Transition elements exhibit variable oxidation states because they release electrons from the following orbits:

1. ns and np orbits

2. (n-1)d and ns orbits

3. (n-1)d orbits

4. ns orbits

 

Subtopic:  Modern Periodic Table & Periodicity |
 73%
From NCERT
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