Classification of Elements and Periodicity in Properties Test

Question 1
1 / -0

The elements in which electrons are progressively filled in 4f-orbital are called

A
Actinoids

B
Transition elements

C
Lanthanoids

D
Halogens

Question 2
1 / -0

Which of the following statements are correct?

(i) Helium has the highest first ionisation enthalpy in the periodic table.

(ii) Chlorine has less negative electron gain enthalpy than fluorine.

(iii) Mercury and bromine are liquids at room temperature.

(iv) In any period, atomic radius of alkali metal is the highest.

A
(i),(ii),(iii)

B
(i),(ii),(iv)

C
(i),(iii),(iv)

D
(ii),(iii),(iv)

Question 3
1 / -0

Which of the following is the correct order of size of the given species:

A
$I > I^-> I^+$

B
$I^+> I^-> I$

C

$I > I^+> I^-$

D

$I^-> I > I^+$

Question 4
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Which of the following sets contain only isoelectronic ions?

(i) $Zn ^{2+},\, Ca ^{2+},\, Ga ^{3+},\, Al ^{3+}$

(ii) $K^ +,\, Ca ^{2+},\, Sc ^{3+},\, Cl^-$

(iii) $P ^{3-},\, S ^{2-},\, Cl ^-,\, K ^+$

(iv) $Ti ^{4+},\, Ar,\, Cr ^{3+} ,\, V ^{5+}$

A
(i),(ii)

B
(ii),(iii)

C
(iii),(iv)

D
(i),(iv)

Question 5
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In which of the following options order of arrangement does not agree with the variation of property indicated against it?

(i) $Al ^{3+}$ < $Mg ^{2+}$ < $Na ^+$ < $F ^-$ (increasing ionic size)

(ii) B < C < N < O (increasing first ionisation enthalpy)

(iii) I < Br < Cl < F (increasing electron gain enthalpy)

(iv) Li < Na < K < Rb (increasing metallic radius)

A
(i),(iv)

B
(iii),(iv)

C
(ii),(iii)

D
(i),(ii)

Question 6
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Which of the following have no unit?

(i) Electronegativity

(ii) Electron gain enthalpy

(iii) Ionisation enthalpy

(iv) Metallic character

A
(i),(ii)

B
(ii),(iii)

C
(iii),(iv)

D
(i),(iv)

Question 7
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In the following questions a statement of Assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Boron has a smaller first ionisation enthalpy than beryllium.

Reason (R): The penetration of a 2s electron to the nucleus is more than the 2p electron hence 2p electron is more shielded by the inner core of electrons than the 2s electrons.

A
Assertion and reason both are correct statements but reason is not correct explanation for assertion

B
Assertion is correct statement but reason is wrong statement

C
Assertion and reason both are correct statements and reason is correct explanation for assertion

D
Assertion and reason both are wrong statements

Question 8

1 / -0

Electronic configuration of some elements is given in Column I and their electron gain enthalpies are given in Column II. Match the electronic configuration with electron gain enthalpy.

Column (I)	Column (II)
(i) $1s^2\,2s^2\,sp^6$	(a) -53
(ii) $1s^2\,2s^2\,2p^6\, 3s^1$	(b) -328
(iii) $1s^2\,2s^2\,2p^5$	(c) -141
(iv) $1s^2\,2s^2\,2p^4$	(d) +48

(i) → (c) (ii) → (b) (iii) → (a) (iv) → (d)

(i) → (d) (ii) → (a) (iii) → (c) (iv) → (b)

(i) → (d) (ii) → (c) (iii) → (b) (iv) → (a)

(i) → (d) (ii) → (a) (iii) → (b) (iv) → (c)

Question 9
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The formation of the oxide ion, $O^{2- }$ (g), from oxygen atom requires first an exothermic and then an endothermic step as shown below:

O (g) + $e^-$ → $O^-$ (g) ; $\Delta H^{\ominus}$ = -141 kJ $mol^{-1}$

$O^-$ (g) + $e^-$ → $O^{2- }$ (g); $\Delta H^{\ominus}$ = +780 kJ $mol^{-1}$

Thus process of formation of $O^{2- }$ in gas phase is unfavourable even though $O^{2- }$ is isoelectronic with neon. It is due to the fact that,

A
Oxygen is more electronegative

B
Addition of electron in oxygen results in larger size of the ion

C
Electron repulsion outweighs the stability gained by achieving noble gas configuration

D
$O^-$ ion has comparatively smaller size than oxygen atom

Question 10
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In the following questions a statement of Assertion (A) followed by a statement of reason (R) is given. Choose the correct option out of the choices given below each question.

Assertion (A): Electron gain enthalpy becomes less negative as we go down a group.

Reason (R): Size of the atom increases on going down the group and the added electron would be farther from the nucleus.

A
Assertion and reason both are correct statements but reason is not correct explanation for assertion

B
Assertion and reason both are correct statements and reason is correct explanation for assertion

C
Assertion and reason both are wrong statements

D
Assertion is wrong statement but reason is correct statement

Question 11
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Ionic radii vary in

(i) inverse proportion to the effective nuclear charge.

(ii) inverse proportion to the square of effective nuclear charge.

(iii) direct proportion to the screening effect.

(iv) direct proportion to the square of screening effect.

A
(i),(ii)

B
(i),(iii)

C
(ii),(iii)

D
(ii),(iv)

Question 12
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An element belongs to $3 ^{rd}$ period and group-13 of the periodic table. Which of the following properties will be shown by the element?

(i) Good conductor of electricity

(ii) Liquid, metallic

(iii) Solid, metallic

(iv) Solid, non metallic

A
(ii),(iv)

B
(ii),(iii)

C
(i),(iii)

D
(i),(iv)

Question 13
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Electronic configurations of four elements A, B, C and D are given below :

(A) $1s ^2\, 2s ^2\, 2p ^6$

(B) $1s ^2\, 2s ^2\, 2p ^4$

(C) $1s ^2\, 2s ^2\, 2p ^6\,3s^1$

(D) $1s ^2\, 2s ^2\, 2p ^5$

Which of the following is the correct order of increasing tendency to gain electron:

A
A < C < B < D

B
A < B < C < D

C
D < B < C < A

D
D < A < B < C

Question 14
1 / -0

For the second period elements the correct increasing order of first ionisation enthalpy is

A
Li < B < Be < C < O < N < F < Ne

B
Li < B < Be < C < N < O < F < Ne

C
Li < Be < B < C < O < N < F < Ne

D
Li < Be < B < C < N < O < F < Ne

Question 15
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The element Z = 114 has been discovered recently. It will belong to which of the following family/group and electronic configuration?

A
$Nitrogen\, family,[Rn]\ 5f^{14}6d^{10}7s^2 7p^6$

B
$Halogen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^5$

C
$Carbon\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^2$

D
$Oxygen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^4$

Submit Test

Classification ...

Question 1

Actinoids

Transition elements

Lanthanoids

Halogens

Question 2

(i),(ii),(iii)

(i),(ii),(iv)

(i),(iii),(iv)

(ii),(iii),(iv)

Question 3

I>I−>I+ I > I^-> I^+

I+>I−>II^+> I^-> I

I>I+>I−I > I^+> I^-

I−>I>I+I^-> I > I^+

Question 4

(i),(ii)

(ii),(iii)

(iii),(iv)

(i),(iv)

Question 5

(i),(iv)

(iii),(iv)

(ii),(iii)

(i),(ii)

Question 6

(i),(ii)

(ii),(iii)

(iii),(iv)

(i),(iv)

Question 7

Assertion and reason both are correct statements but reason is not correct explanation for assertion

Assertion is correct statement but reason is wrong statement

Assertion and reason both are correct statements and reason is correct explanation for assertion

Assertion and reason both are wrong statements

Question 8

(i) → (c) (ii) → (b) (iii) → (a) (iv) → (d)

(i) → (d) (ii) → (a) (iii) → (c) (iv) → (b)

(i) → (d) (ii) → (c) (iii) → (b) (iv) → (a)

(i) → (d) (ii) → (a) (iii) → (b) (iv) → (c)

Question 9

Oxygen is more electronegative

Addition of electron in oxygen results in larger size of the ion

Electron repulsion outweighs the stability gained by achieving noble gas configuration

O−O^- ion has comparatively smaller size than oxygen atom

Question 10

Assertion and reason both are correct statements but reason is not correct explanation for assertion

Assertion and reason both are correct statements and reason is correct explanation for assertion

Assertion and reason both are wrong statements

Assertion is wrong statement but reason is correct statement

Question 11

(i),(ii)

(i),(iii)

(ii),(iii)

(ii),(iv)

Question 12

(ii),(iv)

(ii),(iii)

(i),(iii)

(i),(iv)

Question 13

A < C < B < D

A < B < C < D

D < B < C < A

D < A < B < C

Question 14

Li < B < Be < C < O < N < F < Ne

Li < B < Be < C < N < O < F < Ne

Li < Be < B < C < O < N < F < Ne

Li < Be < B < C < N < O < F < Ne

Question 15

Nitrogenfamily,[Rn] 5f146d107s27p6Nitrogen\, family,[Rn]\ 5f^{14}6d^{10}7s^2 7p^6

Halogenfamily,[Rn] 5f146d107s27p5Halogen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^5

Carbonfamily,[Rn] 5f146d107s27p2Carbon\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^2

Oxygenfamily,[Rn] 5f146d107s27p4Oxygen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^4

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Question Analysis

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$I > I^-> I^+$

$I^+> I^-> I$

$I > I^+> I^-$

$I^-> I > I^+$

$O^-$ ion has comparatively smaller size than oxygen atom

$Nitrogen\, family,[Rn]\ 5f^{14}6d^{10}7s^2 7p^6$

$Halogen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^5$

$Carbon\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^2$

$Oxygen\, family, [Rn]\ 5f^{14} 6d^{10} 7s^2 7p^4$