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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. Which of the following has greatest tendency lose electron?

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

Sb < As < S < P < Cl

Cl < Sb < P < As < S

Sb < As < Cl < S < P

As < Cl < P < S < Sb

3. White enamel of our teeth is

Ca₃ (PO4)₂

CaF₂

CaBr₂

CaU₂

4. Mark the correct statement

Cl⁺ (ions are equal in size)

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

Cl⁺ is smaller than Cl atom

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

Location of nucleus by Rutherford

x-rays by Roentgen

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

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

7. Which statement is correct?

Hydrogen resembles in properties with IIA, IVA and VIA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

8. 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

9. The electronegativity of Sodium is

1.8

0.9

1.2

1.5

10. Which order of ionization energy is correct?

Mg > A1

Si > P

Both b & c

Mg < A1

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

Isobars

Isotopes

Isotropes

Isomers

12. Which one is the strongest reducing agent?

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

C, N, O

Na, Mg, C

I, Br, CI

Li, Na, K

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

Cl-

H-

All are stable

H+

15. Which of the following has highest electropositive character?

16. Non-metals usually form ________ oxides.

Neutral

Acidic

All of the above

Amphoteric

17. Magnesium keeps on burning in

N₂ as well as Co₂

N₂

Co₂

N₂O

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

p – block elements

d – block elements

s – block elements

f – block elements

19. Shielding effect across the period

Decreases

Increases

Remains constant

Cannot be predicted

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

s-block

p-block

f-block

d-block

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

Atomic numbers

Density

Volume

Atomic masses

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

Atomic volume

Atomic radii

Ionization energy

m.P and B.P

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

9, 17

7, 15

3, 20

6, 12

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

Endothermic

Exothermic

A or b

Data is insufficient

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

Group IA

Group IB

Group VIII

Group VII A

Page 2 of 5

26. The electronegativity of Si is

2.1

1.8

1.2

1.5

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

Alkali metals (I-A)

Halogens (VII-A)

Group-14 elements (IV-A)

Group-18 elements (VIII-A)

28. The highly electronegativity atom is

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

IIA

VIA

IIIA

30. Oxidation state of an atomic represent

None

No of e gained or/lost

No of e lost

No of e gained

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

d – block elements

p – block elements

f – block elements

s – block elements

32. Noble gases are named so because they are

Having completely filled valence shell

All

Inert

Zero group element

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

Chemical properties

Properties of their compounds

All

Physical properties

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

35. Which one is more acidic?

As₂O₃

Al₂O₃

Cl₂O₇

Wa₂O₂

36. Inner transition elements are called

All

Actinides

Rare earth metals

Lanthanides

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

Copper

Germanium

Hydrogen

38. Seventh period contains ____________ normal elements

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

Rare earths

Inert gases

Actinides

Alkaline earths

40. Variable valency is generally exhibited by

Transition elements

Normal elements

None of these

Metallic elements

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

Coordination number of icons

BP of elements

Ionization energy of elements

MP of elements

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

Na < K < Rb < Mg

Mg < K < Na < Rb

Mg < Na < Rb < K

Mg < Na < K < Rb

43. Higher value of electron affinity means

Atom will lose electron easily

Atom may form di-positive ion

The reason is unknown

Atom will gain electron easily

44. Which of the following pairs are chemically dissimilar?

Zr and Hf

Ba and Sr

Na and K

Ca and Zn

45. The element with highest first ionization energy is

46. Which of the pair of metalloids?

Na and K

As and Sb

Cu and Au

F and U

47. The periodic table consists of

7 horizontal and 18 vertical series

8 horizontal and 18 vertical series

7 horizontal and 7 vertical series

8 horizontal and 7 vertical series

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

Bonding behavior

Ionization potential

Electronegativity

Neutron/proton ration

49. Mark the Dobereiner triad

B, C, Si

Cl, Br, I

Zn, Cr, Na

Ne, Ar, K

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

Lother Meyer

Dobereiner

Bohr

Newlands

Page 3 of 5

51. Which has largest first ionization energy?

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

Cl > I

Ba > Mg

Lu > Ce

B > Ga

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

The shielding constant

Both the nuclear charge and the shielding constant

The charge on the nucleus

The atomic number

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

Inert gases

Rare earth metals

Alkali metals

Alkaline earth metals

55. 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, F and Br

F, Cl and Br

Br, Cl and F

Cl, Br and F

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

F O C Cl Br

F Cl Br O C

C O F Cl Br

F C O Cl Br

57. Mark the correct statement

All lanthanides are present in the same group

All the alkali metals are present in the same period

All halogens are present in the same period

All the noble gases are present in the same period

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

Cesium

Oxygen

Barium

Argon

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

60. Metals form halides which are

Covalent

Ionic

All

Polymeric

61. 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 53

Elements with atomic number 17 and 38

Elements with atomic numbers 20 and 40

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

Dobereiner

Lother Meyer

New lands

Rutherford

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

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

Sodium

Hydrogen

Germanium

Copper

65. Which one has least ionization Potential?

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

Ag, Au, Hg

Cu, Fe, Au

Cu, Ag, Au

Cu, Hg, Au

67. The longest period in the modern periodic table is

7th

6th

5th

2nd and 3rd both

68. Oxidation state of an atom represent

Apparent charge I compound

Number of electrons lost

Its vacancies

Number of electrons gained

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

Noble gases

Alkali metals

Inert metals

Halogens

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

Number of valence electrons

Atomic mass

Atomic number

Atomic volume

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

Two

One

Zero

Three

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

73. Elements with similar chemical properties appear in 1 the

p block elements

Same period

Same family

Right upper corner

74. 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 decrease down the group

Melting points of halogens remains the same throughout the group

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

Similar electronic configuration

Both are not found in free state

All

Both are electropositive

Page 4 of 5

76. Which one is not an ionic hydride?

NaH

CsH

LiH

77. The atomic radii decreases by increasing atomic number in

Elements from Li to Ne

Alkali metal

Halogens

Alkaline earth metal

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

Atomic mass

Valency

Valence electrons

Atomic number

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

None

80. The atomic radii decrease by increasing atomic number in

Alkali metal

Halogens

Alkaline earth metal

Elements from Li to Ne

81. The element with atomic number 14 belongs to

4th period

5th period

3rd period

2nd period

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

Group IIA

VIIA

IVA

Zero

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

Atomic volume

Ionization energy

Melting & boiling points

Atomic radii

84. Inner transition elements are called

Lanthanides

Actinides

All

Rare earth metals

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

86. Californium is the member of

Actinide series

Lanthanide series

Alkaline earth metals

Alkali metals

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

Both form ionic compounds

All

Both are electropositive

Similar outer most shell electronic configuration

88. Hydrogen resembles with carbon because of having

Homovalent (show same valency)

Same number of electrons in the valence shell

Remarkable reducing properties

Similar physical state

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

VII

90. Which of the following elements is most electronegative?

Oxygen

Fluorine

Nitrogen

Chlorine

91. Mark the elements that belong to same period:

Cr, In, Pb

Ca, Cr, Zn

Li, Na, K

H, He, F

92. The elements which behave as metalloid is:

AI & Zn

Rb & Cs

Br & I

Pt & I

93. 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

Ionization energy

Electronegativity

Electron affinity

94. Mark the correct statement

The ionization energy of calcium is higher than that of magnesium

The ionization energy of calcium is than that of beryllium

The ionization energy of calcium is lower than that of strontium

The ionization energy of calcium is lower than that of barium

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

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

97. Metallic characters of alkali metals

Decrease down the group

No regular trend

Remain same

Increase down the group

98. Which of the following possess maximum hydration power?

Mg⁺²

Ca⁺²

K⁺

Na⁺

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

100. Alkali metals in each period have

Lowest IE

Highest electronegativity

Smallest size

Highest IE

Page 5 of 5

101. 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

O– ion has comparatively larger size oxygen atom

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

Oxygen has high electron affinity

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

103. Chemically the most similar pair of elements is

Ti, Zr

Cu, S

Na, Al

Zr, Hf

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

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

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

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

All above statements are correct

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

Group IV-A

Group VII-A

Group II-A

Group VI-A

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

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

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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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