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

Rare earths

Alkaline earths

Actinides

Inert gases

2. Which has largest first ionization energy?

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

4. The electronegativity of Si is

2.1

1.8

1.5

1.2

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

Chemical properties

All

Physical properties

Properties of their compounds

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

None

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

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

Group IIA

IVA

Zero

VIIA

9. Seventh period contains ____________ normal elements

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

Both are not found in free state

Similar electronic configuration

Both are electropositive

All

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

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

Argon

Barium

Oxygen

Cesium

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

14. Shielding effect across the period

Cannot be predicted

Decreases

Remains constant

Increases

15. Mark the elements that belong to same period:

Ca, Cr, Zn

Cr, In, Pb

Li, Na, K

H, He, F

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

Group VII-A

Group VI-A

Group IV-A

Group II-A

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

Atomic volume

Atomic radii

Ionization energy

Melting & boiling points

18. Which statement is correct?

Hydrogen resembles in properties with IIA, IVA and VIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

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

F Cl Br O C

C O F Cl Br

F O C Cl Br

F C O Cl Br

20. The highly electronegativity atom is

21. 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 has high electron affinity

O– ion has comparatively larger size oxygen atom

Oxygen is more electronegative

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

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

p – block elements

s – block elements

d – block elements

f – block elements

23. Which one has least ionization Potential?

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

Two

Three

One

Zero

25. Inner transition elements are called

Rare earth metals

All

Lanthanides

Actinides

Page 2 of 5

26. Mark the correct statement

Melting points of halogens decrease down the group

Melting points of halogens remains the same throughout the group

Melting points of halogens increases down the group

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

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

H-

Cl-

All are stable

H+

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

29. Which of the following has highest electropositive character?

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

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

All above statements are correct

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

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

Inert metals

Halogens

Noble gases

Alkali metals

32. The periodic table consists of

7 horizontal and 18 vertical series

8 horizontal and 7 vertical series

8 horizontal and 18 vertical series

7 horizontal and 7 vertical series

33. Mark the correct statement

Na⁺ is larger than Na atom

Cl⁺ is smaller than Cl atom

Na⁺ is smaller than Na atom

Cl⁺ (ions are equal in size)

34. The elements which behave as metalloid is:

Pt & I

AI & Zn

Br & I

Rb & Cs

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

f-block

s-block

d-block

p-block

36. The element with atomic number 14 belongs to

2nd period

3rd period

4th period

5th period

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

Dobereiner

New lands

Rutherford

Lother Meyer

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

Mg < Na < Rb < K

Mg < K < Na < Rb

Na < K < Rb < Mg

Mg < Na < K < Rb

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

x-rays by Roentgen

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

Location of nucleus by Rutherford

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

B > Ga

Lu > Ce

Ba > Mg

Cl > I

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

Group VIII

Group VII A

Group IA

Group IB

42. Hydrogen resembles with carbon because of having

Homovalent (show same valency)

Similar physical state

Remarkable reducing properties

Same number of electrons in the valence shell

43. Magnesium keeps on burning in

N₂

Co₂

N₂ as well as Co₂

N₂O

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

A or b

Data is insufficient

Exothermic

Endothermic

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

Both the nuclear charge and the shielding constant

The charge on the nucleus

The shielding constant

The atomic number

46. Chemically the most similar pair of elements is

Ti, Zr

Na, Al

Zr, Hf

Cu, S

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

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

Valence electrons

Atomic number

Valency

Atomic mass

49. Higher value of electron affinity means

The reason is unknown

Atom will gain electron easily

Atom will lose electron easily

Atom may form di-positive ion

50. 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:

Cl, Br and F

Cl, F and Br

F, Cl and Br

Br, Cl and F

Page 3 of 5

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

Density

Atomic numbers

Atomic masses

Volume

52. Which one is not an ionic hydride?

CsH

NaH

LiH

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

Ionization energy

Atomic radii

m.P and B.P

Atomic volume

54. Non-metals usually form ________ oxides.

Acidic

Amphoteric

All of the above

Neutral

55. Metals form halides which are

Ionic

All

Polymeric

Covalent

56. 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

Ionization energy

Valency

Electron affinity

Electronegativity

57. Which of the following elements is most electronegative?

Nitrogen

Fluorine

Chlorine

Oxygen

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

Bohr

Newlands

Lother Meyer

Dobereiner

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

Germanium

Copper

Hydrogen

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

61. Which of the following possess maximum hydration power?

Mg⁺²

K⁺

Na⁺

Ca⁺²

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

Group-18 elements (VIII-A)

Halogens (VII-A)

Group-14 elements (IV-A)

Alkali metals (I-A)

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

d – block elements

p – block elements

s – block elements

f – block elements

64. Which one is the strongest reducing agent?

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

BP of elements

Coordination number of icons

MP of elements

Ionization energy of elements

66. Mark the correct statement

The ionization energy of calcium is than that of beryllium

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 lower than that of barium

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

VII

68. Which of the pair of metalloids?

F and U

Cu and Au

Na and K

As and Sb

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

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

71. Mark the correct statement

All lanthanides are present in the same group

All halogens are present in the same period

All the alkali metals are present in the same period

All the noble gases are present in the same period

72. The longest period in the modern periodic table is

2nd and 3rd both

5th

7th

6th

73. The element with highest first ionization energy is

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

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

7, 15

3, 20

9, 17

6, 12

Page 4 of 5

76. Variable valency is generally exhibited by

Normal elements

None of these

Transition elements

Metallic elements

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

Inert gases

Rare earth metals

Alkaline earth metals

Alkali metals

78. Which one is more acidic?

Al₂O₃

Cl₂O₇

Wa₂O₂

As₂O₃

79. Mark the Dobereiner triad

Ne, Ar, K

Zn, Cr, Na

Cl, Br, I

B, C, Si

80. 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 number of isotopes it has

Charge on its ions

The formula of its oxides

Acidic or basic nature of oxides

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

IIA

VIA

IIIA

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

Electronegativity

Neutron/proton ration

Ionization potential

Bonding behavior

83. The atomic radii decreases by increasing atomic number in

Halogens

Alkali metal

Elements from Li to Ne

Alkaline earth metal

84. Alkali metals in each period have

Lowest IE

Smallest size

Highest electronegativity

Highest IE

85. Noble gases are named so because they are

Zero group element

All

Having completely filled valence shell

Inert

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

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

Li, Na, K

C, N, O

Na, Mg, C

I, Br, CI

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

Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

Cu, Fe, Au

89. Elements with similar chemical properties appear in 1 the

Right upper corner

p block elements

Same period

Same family

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

91. The electronegativity of Sodium is

0.9

1.5

1.2

1.8

92. Which of the following pairs are chemically dissimilar?

Na and K

Ba and Sr

Ca and Zn

Zr and Hf

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

Number of valence electrons

Atomic volume

Atomic number

Atomic mass

94. Metallic characters of alkali metals

No regular trend

Remain same

Increase down the group

Decrease down the group

95. Inner transition elements are called

Lanthanides

All

Actinides

Rare earth metals

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

97. White enamel of our teeth is

CaU₂

CaF₂

Ca₃ (PO4)₂

CaBr₂

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

Isomers

Isobars

Isotropes

Isotopes

99. Oxidation state of an atomic represent

No of e gained or/lost

No of e lost

No of e gained

None

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

Elements with atomic number 11 and 33

Elements with atomic numbers 20 and 40

Elements with atomic number 17 and 53

Elements with atomic number 17 and 38

Page 5 of 5

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

Hydrogen

Sodium

Germanium

Copper

102. Oxidation state of an atom represent

Number of electrons gained

Apparent charge I compound

Number of electrons lost

Its vacancies

103. The atomic radii decrease by increasing atomic number in

Elements from Li to Ne

Alkaline earth metal

Halogens

Alkali metal

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

Similar outer most shell electronic configuration

All

Both form ionic compounds

Both are electropositive

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

Sb < As < S < P < Cl

Sb < As < Cl < S < P

As < Cl < P < S < Sb

Cl < Sb < P < As < S

106. Which order of ionization energy is correct?

Mg > A1

Si > P

Both b & c

Mg < A1

107. Californium is the member of

Alkali metals

Actinide series

Alkaline earth metals

Lanthanide series

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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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