Successive ionisation energies of an element ' X ' are given below (in k cal ): IP 1 IP 2 IP 3 IP 4 165 195 556 595 Electronic configuration of the element ' X ' is:

1 s 2 , 2 s 2 2 p 6 , 3 s 2 3 p 2

Basic property - MgO > CaO > FeO > Fe 2 O 3

Electronegativity - P < N < O < F

1 st ionisation potential - B < Be < O < N

Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-1>Q 38

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IMPORTANT

Earn 100

Which element do not have valency equals to its group no. :

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Important Questions on Classification of Elements and Periodicity in Properties

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 4

Ionic radii of:

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 7

The second ionisation potentials in electron volts of oxygen and fluorine atoms are respectively given by

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 10

{IE}_{1}

and

{IE}_{2}

of

Mg

are

178

and

348 kcal

{mol}^{- 1}

. The energy required for the reaction

Mg ⟶ {Mg}^{2 +} + 2 e^{-}

is:

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 11

Successive ionisation energies of an element $' X'$ are given below (in $k cal$ ):

${IP}_{1}$	${IP}_{2}$	${IP}_{3}$	${IP}_{4}$
$165$	$195$	$556$	$595$

Electronic configuration of the element $' X'$ is:

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 23

Second electron affinity of an element is:

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 26

In boron atom screening is due to

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 32

Which order is wrong

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Beta Question Bank for Engineering: Chemistry>Chapter 13 - Classification of Elements and Periodicity in Properties>EXERCISE-2>Q 38

If the ionisation potential is

IP

, electron affinity is

EA

and electronegativity is

x

then which of the following relation is correct

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