Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 17

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Which of the following represents the correct order of increasing first ionisation enthalpy for $Ca, Ba, S, Se and Ar$ ?

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Important Questions on Classification of Elements and Periodicity in Properties

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 18

The first ionisation potential of

Na

is

5.1 eV .

The value of electron gain enthalpy of

{Na}^{+}

will be:

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 19

The ionic radii (in

Å

) of

N^{3 -}, O^{2 -}

and

F^{-}

are respectively

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 20

Which of the following atoms has the highest first ionization energy?

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 21

Following statements regarding the periodic trends of chemical reactivity of the alkali metals and the halogens are given. Which of these statements gives the correct picture?

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 22

Correct order of acidic strength is :

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>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 Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-3>Q 24

The correct order of atomic radii is:

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Alpha Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>Exercise-4>Q 1

Of the following pairs, the one containing examples of metalloid elements is: