Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 21

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In which of the following reactions, there is no change in valency?

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Important Questions on Classification of Elements and Periodicity in Properties

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 22

The

C - C

and

Si - C

Interatomic distances are

154

pm

and

188

pm

. The atomic radius of

Si

is:

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 23

The atomic number of

V, C r, M n

and

F e

are repectively

23, 24, 25

and

26

. Which one of these may be expected to have the highest second ionisation enthalpy?

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 24

In the context of lanthanoids, which of the following statements is not correct?

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 25

The correct order of atomic radii is:

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 26

Which of the following belongs to a representative group of elements of the periodic table?

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 27

The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is:

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 28

Which element has highest electronegativity?

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Alpha Question Bank for Medical: Chemistry>Chapter 12 - Classification of Elements and Periodicity in Properties>Exercise 2>Q 29

Anything that influences the valence electrons will affect the chemistry of the element. Which one of the following factors does not affect the valence shell?