Home/ECAT/ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

Maan AliLast Updated: April 19, 2025

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

Total Questions:	107
Time Allowed:	60 Minutes
Total Marks:	107
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

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Page 1 of 5

Chemistry

1. An element having low value of ionization energy and low value of electron affinity is likely to belong to

Group VII A

Group VIII

Group IA

Group IB

2. Which among the following elements have lowest value of IE₁?

3. The attraction that an atom exerts on a pair of electrons that are being shared with another atom for forming covalent bond is referred to as its

Valency

Electronegativity

Electron affinity

Ionization energy

4. The valency of noble gases, in general, is

Three

Two

One

Zero

5. The atomic radii decrease by increasing atomic number in

Alkaline earth metal

Elements from Li to Ne

Alkali metal

Halogens

6. Mark the correct statement

All halogens are present in the same period

All the noble gases are present in the same period

All the alkali metals are present in the same period

All lanthanides are present in the same group

7. The element with atomic number 55 belongs to which block of the periodic table

d-block

f-block

s-block

p-block

8. Which of the following groups may contain a metalloid?

IIA

VIA

IIIA

9. The highly electronegativity atom is

10. Which of the following possess maximum hydration power?

K⁺

Ca⁺²

Na⁺

Mg⁺²

11. The alkali metal which is liquid at 15°C is

None

12. Which of the following pairs are chemically dissimilar?

Ba and Sr

Zr and Hf

Ca and Zn

Na and K

13. Which of the following set consist of all coinage metals?

Ag, Au, Hg

Cu, Ag, Au

Cu, Hg, Au

Cu, Fe, Au

14. Which of the following ion is stable in aqueous solution?

H-

Cl-

H+

All are stable

15. Modern periodic table has been divided in _________ blocks.

16. Which one has least ionization Potential?

17. White enamel of our teeth is

CaU₂

CaBr₂

CaF₂

Ca₃ (PO4)₂

18. Which of these Period 3 elements have highest electronegativity?

19. Mark the correct statement

The ionization energy of calcium is higher than that of magnesium

The ionization energy of calcium is lower than that of strontium

The ionization energy of calcium is than that of beryllium

The ionization energy of calcium is lower than that of barium

20. Which one is not an ionic hydride?

LiH

CsH

NaH

21. Elements with similar chemical properties appear in 1 the

Same family

Same period

Right upper corner

p block elements

22. Inner transition elements are called

All

Rare earth metals

Lanthanides

Actinides

23. Among the following elements which one has the highest value of first ionization potential?

Argon

Cesium

Oxygen

Barium

24. Which of the following elements is/are not liquid at 30°C?

25. The number of elements in fourth period of periodic table is

Page 2 of 5

26. Hydrogen resembles with carbon because of having

Same number of electrons in the valence shell

Homovalent (show same valency)

Similar physical state

Remarkable reducing properties

27. Noble gases are named so because they are

Zero group element

Having completely filled valence shell

Inert

All

28. The valence shell electronic stricture of an element is ns²np⁵. The element will belong to the group of

Halogens

Noble gases

Inert metals

Alkali metals

29. Among the elements given below, the one with highest electro positivity is

30. The element with atomic number 26 will be found in group

31. Which of the following elements is most electronegative?

Nitrogen

Chlorine

Oxygen

Fluorine

32. Which of the following metal requires radiation of highest frequency to cause emission of electrons?

33. The electronegativity of Si is

1.2

2.1

1.5

1.8

34. Addition of 2nd e to uni-negative ion is always

A or b

Data is insufficient

Exothermic

Endothermic

35. Among O, C, F, Cl, Br, the correct order of increasing radii is

F C O Cl Br

C O F Cl Br

F O C Cl Br

F Cl Br O C

36. Of the given alkali metals, the one with smallest size is

37. Which of the following does not reflect the periodicity of elements?

Electronegativity

Ionization potential

Bonding behavior

Neutron/proton ration

38. Shielding effect across the period

Remains constant

Decreases

Increases

Cannot be predicted

39. Elements were classified into groups of three called as trades by

New lands

Lother Meyer

Dobereiner

Rutherford

40. Which element was not known when Mendeleev proposed his classification?

Germanium

Hydrogen

Copper

Sodium

41. The electronegativity of Sodium is

1.5

1.8

0.9

1.2

42. Which discovery caused a revision in periodic law as predicted by Mendeleev?

Henry Becquerel’s natural radioactivity

Location of nucleus by Rutherford

Atomic number by Moseley

x-rays by Roentgen

43. Elements in the same vertical group of the periodic table have same

Atomic number

Atomic mass

Number of valence electrons

Atomic volume

44. Keeping in view the size of atoms, which order in correct one

Cl > I

Lu > Ce

B > Ga

Ba > Mg

45. Magnesium keeps on burning in

N₂

N₂O

Co₂

N₂ as well as Co₂

46. Alkali metals in each period have

Highest electronegativity

Highest IE

Lowest IE

Smallest size

47. Oxidation state of an atom represent

Number of electrons lost

Apparent charge I compound

Number of electrons gained

Its vacancies

48. Which of the following groups of period table has entirely metals?

VII

49. Best position of hydrogen in the periodic table is above I.A Group which is mainly due to

Both are electropositive

Both form ionic compounds

All

Similar outer most shell electronic configuration

50. Oxidation state of an atomic represent

No of e gained or/lost

No of e gained

No of e lost

None

Page 3 of 5

51. An element has electronic configuration 1s2 2s2 2p2. It belongs to

Group IV-A

Group VI-A

Group II-A

Group VII-A

52. Best position of hydrogen in the periodic table is mainly due to

Similar electronic configuration

All

Both are electropositive

Both are not found in free state

53. Which statement is correct?

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

Hydrogen resembles in properties with IIA, IVA and VIA elements

54. Mark the elements that belong to same period:

Li, Na, K

Ca, Cr, Zn

Cr, In, Pb

H, He, F

55. The element with highest first ionization energy is

56. The periodic table consists of

8 horizontal and 7 vertical series

8 horizontal and 18 vertical series

7 horizontal and 18 vertical series

7 horizontal and 7 vertical series

57. Mark the correct statement

Melting point of halogens first increase and then decrease down the group

Melting points of halogens increases down the group

Melting points of halogens remains the same throughout the group

Melting points of halogens decrease down the group

58. Many of the properties of elements and its compounds can be predicted from the position of element in the periodic table. Which property cannot be predicted?

The formula of its oxides

Charge on its ions

The number of isotopes it has

Acidic or basic nature of oxides

59. Higher value of electron affinity means

Atom will gain electron easily

Atom may form di-positive ion

Atom will lose electron easily

The reason is unknown

60. The property which increases up to the middle of the period and then decreases is

Atomic radii

Atomic volume

m.P and B.P

Ionization energy

61. Californium is the member of

Actinide series

Alkali metals

Lanthanide series

Alkaline earth metals

62. The attempt of classification of elements by plotting the atomic weight of elements against their volumes was made

Lother Meyer

Newlands

Dobereiner

Bohr

63. Periodic table provides a basic framework to study elements with respect to their

Physical properties

Chemical properties

All

Properties of their compounds

64. Metallic characters of alkali metals

No regular trend

Decrease down the group

Remain same

Increase down the group

65. The 14 elements have been placed in VI period and II group of periodic table. These are called

Alkali metals

Alkaline earth metals

Inert gases

Rare earth metals

66. Which of the pairs belongs to the same group of periodic table?

Elements with atomic number 11 and 33

Elements with atomic number 17 and 38

Elements with atomic number 17 and 53

Elements with atomic numbers 20 and 40

67. Which has largest first ionization energy?

68. The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

Mg < K < Na < Rb

Na < K < Rb < Mg

Mg < Na < Rb < K

Mg < Na < K < Rb

69. Inner transition elements are called

Actinides

Lanthanides

Rare earth metals

All

70. Metals form halides which are

Ionic

Polymeric

Covalent

All

71. Which one of the following is not a periodic property?

Coordination number of icons

BP of elements

MP of elements

Ionization energy of elements

72. Modern periodic table has been divided in __________ block.

73. Mark the Dobereiner triad

Ne, Ar, K

B, C, Si

Cl, Br, I

Zn, Cr, Na

74. The electron affinity values (in kJ mol¯¹) of three halogens X, Y and Z are respectively – 349, -333 and -325. Then X, Y and Z respectively are:

Br, Cl and F

Cl, F and Br

Cl, Br and F

F, Cl and Br

75. The formation of the oxide ion O²¯ (g) requires first a exothermic and then and endothermic step – as shown below:
O(g) +e – → O
∆Ho = – 142 k3 mol – 1
O– (g) + e– →O2 –(g)
∆Ho = + ∆H° = + 844 kJ mol¯¹
This is because:

Oxygen is more electronegative

Oxygen has high electron affinity

O– ion has comparatively larger size oxygen atom

O– ion will tend to resist the addition of another electron

Page 4 of 5

76. Which of the following represents element s in order of increasing atomic size?

Na, Mg, C

C, N, O

I, Br, CI

Li, Na, K

77. Seventh period contains ____________ normal elements

78. The defects in the Mendeleev’s Periodic table is/are

All above statements are correct

Similar elements like Cu and Zn have been placed in different groups

In spite of their different properties, alkali metals and coinage metals have been grouped together

K (at, wt.39.1) has been placed after argon (at, wt. 39.9)

79. Which of the following has greatest tendency lose electron?

80. Which one is the strongest reducing agent?

81. Variable valency is generally exhibited by

Normal elements

None of these

Transition elements

Metallic elements

82. The atomic radii decreases by increasing atomic number in

Halogens

Elements from Li to Ne

Alkaline earth metal

Alkali metal

83. An element has electronic configuration IS2, 2S2, 2P2 with which group does this element belong to

VIIA

Zero

Group IIA

IVA

84. Number of elements present in the fifth period of periodic table is

85. Which of the following statements is most appropriate about effective nuclear charge? It depends upon?

The shielding constant

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

86. Which one is more acidic?

Cl₂O₇

Wa₂O₂

As₂O₃

Al₂O₃

87. The atoms of same element having same atomic number bit different mass number are called

Isotropes

Isobars

Isotopes

Isomers

88. The longest period in the modern periodic table is

2nd and 3rd both

6th

7th

5th

89. Which set of elements is listed in order of increasing ionization energy?

As < Cl < P < S < Sb

Cl < Sb < P < As < S

Sb < As < S < P < Cl

Sb < As < Cl < S < P

90. Elements whose outer electronic configuration vary from ns²np¹ to ns¹np⁶ constitute

s – block elements

f – block elements

p – block elements

d – block elements

91. Elements whose atoms have two outermost shells incomplete are called

s – block elements

p – block elements

d – block elements

f – block elements

92. In modern periodic table all the elements are arranged in ascending order of

Atomic mass

Valence electrons

Atomic number

Valency

93. Which of the pair of metalloids?

Cu and Au

As and Sb

Na and K

F and U

94. Which element was not known when Mendeleev proposed his classification?

Copper

Hydrogen

Germanium

95. Which of the p-block elements are not representative elements?

Group-18 elements (VIII-A)

Alkali metals (I-A)

Halogens (VII-A)

Group-14 elements (IV-A)

96. The property which increases up to group IV-A then decreases onwards

Atomic volume

Melting & boiling points

Atomic radii

Ionization energy

97. The element with atomic number 14 belongs to

4th period

2nd period

5th period

3rd period

98. The discovery of which of the following group of elements give below to the Newland’s law of octaves?

Rare earths

Alkaline earths

Inert gases

Actinides

99. Which of the following has highest electropositive character?

100. IN the light of Mendeleev’s periodic law,. the properties of elements are periodic function of their

Density

Atomic numbers

Volume

Atomic masses

Page 5 of 5

101. Non-metals usually form ________ oxides.

All of the above

Neutral

Amphoteric

Acidic

102. Mark the correct statement

Cl⁺ is smaller than Cl atom

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

Cl⁺ (ions are equal in size)

103. Which of these Period 3 element has lowest electronegativity?

104. Which of the following pair of atomic numbers represents s-block element?

3, 20

9, 17

7, 15

6, 12

105. The elements which behave as metalloid is:

AI & Zn

Rb & Cs

Pt & I

Br & I

106. Which order of ionization energy is correct?

Mg > A1

Si > P

Mg < A1

Both b & c

107. Chemically the most similar pair of elements is

Cu, S

Na, Al

Zr, Hf

Ti, Zr

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Maan AliLast Updated: April 19, 2025

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6 Comments

Khudabux mari padidan station says:

June 2, 2022 at 6:31 am

76

Khudabux mari padidan station says:

June 2, 2022 at 6:23 am

56

Asad ali says:

July 30, 2021 at 9:20 am

Please practice today because I’m not sure if

Abdul Raqeeb says:

August 4, 2020 at 10:24 am

Sir there is an issue that when I select my topic for test the 1st question not appears also these is not the appearance of option to go for next question

DANIAL says:

May 31, 2017 at 8:38 pm

Sir check your MCQs nmbr 12.

jahanzaib shahid says:

November 6, 2016 at 1:51 am

really thank u so much

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

Chemistry

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Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

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