Ionic radii are :

1. Inversely proportional to the effective nuclear charge.

2. Inversely proportional to the square of effective nuclear charge.

3. Directly proportional to the effective nuclear charge.

4. Directly proportional to the square of effective nuclear charge.

Subtopic:  Atomic Size |
 74%
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Which one is a metalloid?

1. Tin

2. Germanium

3. Sulphur

4. Carbon

Subtopic:  Nature of Compound |
 82%
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Zn and Cd do not show variable valency like 'd' block elements due to :

1. Softness

2. Completed 'd' orbital

3. Two electrons in outermost orbit

4. Low m.p.

Subtopic:  Modern Periodic Table & Periodicity |
 88%
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In the long form of periodic table, the elements having lowest ionization potential are placed in:

1. I group

2. IV group

3. VII group

4. Zero group

Subtopic:  Ionization Energy (IE) |
 80%
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Elements with an electronic configuration 1s2s22p 3s23p63d10 4s24p64d10 5s25p3 belong to the group :

1. 3rd 2. 15th
3. 17th 4. 2nd
Subtopic:  Electronic Configuration |
 82%
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Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?

1. 3d3,4s2

2. 3d5,4s1

3. 3d5,4s2

4. 3d2,4s2

Subtopic:  Electronic Configuration |
 61%
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Those in a group that falls under the law of triads include:

1. Cl, Br, I

2. C, N, O

3. Na, K, Rb

4. H, O, N

Subtopic:   Evolution of Periodic Table |
 63%
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 All the non-metals in the long form of the periodic table are placed under:

1. s-Block

2. p-Block

3. f-Block

4. d-Block

Subtopic:  Modern Periodic Table & Periodicity |
 88%
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General electronic configuration of the transition elements is given by:

1. ns2nd1-10

2. ns2np6nd1-10

3. (n-1)d1-10np6

4. (n-1)d1-10ns1-2

 

Subtopic:  Electronic Configuration |
 82%
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The statement that is incorrect for the periodic classification of elements is:

1. The properties of elements are a periodic function of their atomic number.

2. Non-metallic elements are lesser in number than metallic elements.

3. The first ionization energies of elements along a period do not vary in a regular manner with an increase in atomic number.

4. For transition elements, the d-subshells are filled with electrons monotonically with an increase in atomic number.

Subtopic:  Electronic Configuration |
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