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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. 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

2. Which of the following has highest electropositive character?

3. Which one is not an ionic hydride?

LiH

NaH

CsH

4. 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

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

VII

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

Halogens

Inert metals

Alkali metals

Noble gases

7. Elements with similar chemical properties appear in 1 the

Same period

p block elements

Right upper corner

Same family

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

Germanium

Copper

Hydrogen

Sodium

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

10. The elements which behave as metalloid is:

Rb & Cs

Br & I

AI & Zn

Pt & I

11. White enamel of our teeth is

CaF₂

CaU₂

CaBr₂

Ca₃ (PO4)₂

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

Isomers

Isobars

Isotopes

Isotropes

13. The element with atomic number 14 belongs to

5th period

3rd period

2nd period

4th period

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

Valency

Atomic mass

Atomic number

Valence electrons

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

Rutherford

Lother Meyer

New lands

Dobereiner

16. Non-metals usually form ________ oxides.

Amphoteric

Acidic

All of the above

Neutral

17. Which of the following possess maximum hydration power?

K⁺

Na⁺

Mg⁺²

Ca⁺²

18. Oxidation state of an atomic represent

No of e gained

None

No of e lost

No of e gained or/lost

19. Mark the Dobereiner triad

B, C, Si

Cl, Br, I

Ne, Ar, K

Zn, Cr, Na

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

Inert gases

Actinides

Alkaline earths

Rare earths

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

22. 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

Acidic or basic nature of oxides

The formula of its oxides

Charge on its ions

23. Mark the correct statement

All the noble gases are present in the same period

All the alkali metals are present in the same period

All halogens are present in the same period

All lanthanides are present in the same group

24. Which has largest first ionization energy?

25. Mark the elements that belong to same period:

H, He, F

Ca, Cr, Zn

Cr, In, Pb

Li, Na, K

Page 2 of 5

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

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

I, Br, CI

Na, Mg, C

Li, Na, K

C, N, O

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

29. 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

Electron affinity

Valency

Electronegativity

30. The element with highest first ionization energy is

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

Newlands

Bohr

Lother Meyer

Dobereiner

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

33. Which one is the strongest reducing agent?

34. Which of the following pairs are chemically dissimilar?

Zr and Hf

Ba and Sr

Na and K

Ca and Zn

35. The highly electronegativity atom is

36. 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:

O– ion has comparatively larger size oxygen atom

Oxygen has high electron affinity

Oxygen is more electronegative

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

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

p-block

f-block

d-block

s-block

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

VIA

IIIA

IIA

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

Ionization energy of elements

MP of elements

BP of elements

Coordination number of icons

40. The atomic radii decreases by increasing atomic number in

Alkaline earth metal

Alkali metal

Halogens

Elements from Li to Ne

41. Which one has least ionization Potential?

42. The longest period in the modern periodic table is

5th

6th

2nd and 3rd both

7th

43. 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)

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

Bonding behavior

Neutron/proton ration

Electronegativity

Ionization potential

45. The electronegativity of Sodium is

1.5

0.9

1.2

1.8

46. The atomic radii decrease by increasing atomic number in

Alkaline earth metal

Halogens

Alkali metal

Elements from Li to Ne

47. Californium is the member of

Actinide series

Alkaline earth metals

Alkali metals

Lanthanide series

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

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

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

H+

All are stable

H-

Cl-

Page 3 of 5

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

52. 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

53. Metallic characters of alkali metals

Increase down the group

No regular trend

Decrease down the group

Remain same

54. Higher value of electron affinity means

Atom will gain electron easily

Atom will lose electron easily

Atom may form di-positive ion

The reason is unknown

55. Which one is more acidic?

As₂O₃

Wa₂O₂

Cl₂O₇

Al₂O₃

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

Argon

Cesium

Barium

Oxygen

57. Which statement is correct?

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

Hydrogen resembles in properties with IIA, IVA and VIA elements

58. 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

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

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

All

Physical properties

Properties of their compounds

Chemical properties

61. Which of the pair of metalloids?

Cu and Au

F and U

Na and K

As and Sb

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

Three

One

Zero

Two

63. Variable valency is generally exhibited by

Metallic elements

Normal elements

Transition elements

None of these

64. Chemically the most similar pair of elements is

Zr, Hf

Cu, S

Na, Al

Ti, Zr

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

Elements with atomic number 17 and 38

Elements with atomic number 17 and 53

Elements with atomic numbers 20 and 40

Elements with atomic number 11 and 33

66. The periodic table consists of

7 horizontal and 18 vertical series

7 horizontal and 7 vertical series

8 horizontal and 18 vertical series

8 horizontal and 7 vertical series

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

6, 12

7, 15

9, 17

3, 20

68. Inner transition elements are called

Actinides

All

Rare earth metals

Lanthanides

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

f – block elements

d – block elements

p – block elements

s – block elements

70. Which of the following elements is most electronegative?

Fluorine

Nitrogen

Oxygen

Chlorine

71. The electronegativity of Si is

1.2

2.1

1.8

1.5

72. Noble gases are named so because they are

Zero group element

Having completely filled valence shell

All

Inert

73. Hydrogen resembles with carbon because of having

Remarkable reducing properties

Similar physical state

Homovalent (show same valency)

Same number of electrons in the valence shell

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

None

75. 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:

F, Cl and Br

Cl, Br and F

Br, Cl and F

Cl, F and Br

Page 4 of 5

76. Magnesium keeps on burning in

Co₂

N₂O

N₂ as well as Co₂

N₂

77. Metals form halides which are

Covalent

All

Polymeric

Ionic

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

Atomic masses

Density

Volume

Atomic numbers

79. 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)

80. Shielding effect across the period

Increases

Remains constant

Decreases

Cannot be predicted

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

Sb < As < Cl < S < P

As < Cl < P < S < Sb

Sb < As < S < P < Cl

Cl < Sb < P < As < S

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

d – block elements

s – block elements

f – block elements

p – block elements

83. 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

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

Atomic volume

Atomic radii

Ionization energy

Melting & boiling points

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

Atomic volume

Ionization energy

m.P and B.P

Atomic radii

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

Group IV-A

Group VI-A

Group VII-A

Group II-A

87. Mark the correct statement

Cl⁺ is smaller than Cl atom

Na⁺ is smaller than Na atom

Cl⁺ (ions are equal in size)

Na⁺ is larger than Na atom

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

Mg < Na < K < Rb

Na < K < Rb < Mg

Mg < Na < Rb < K

Mg < K < Na < Rb

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

Cl > I

B > Ga

Ba > Mg

Lu > Ce

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

Copper

Hydrogen

Germanium

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

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

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

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

Group IB

Group VIII

Group VII A

Group IA

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

VIIA

Group IIA

Zero

IVA

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

Endothermic

A or b

Data is insufficient

Exothermic

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

Atomic number

Number of valence electrons

Atomic mass

Atomic volume

98. Inner transition elements are called

Rare earth metals

All

Lanthanides

Actinides

99. Mark the correct statement

Melting points of halogens remains the same throughout the group

Melting points of halogens decrease down the group

Melting points of halogens increases down the group

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

100. Seventh period contains ____________ normal elements

Page 5 of 5

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

Both are electropositive

Similar electronic configuration

Both are not found in free state

All

102. Oxidation state of an atom represent

Its vacancies

Apparent charge I compound

Number of electrons lost

Number of electrons gained

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

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

C O F Cl Br

F Cl Br O C

F C O Cl Br

F O C Cl Br

105. Alkali metals in each period have

Lowest IE

Highest electronegativity

Smallest size

Highest IE

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

Cu, Fe, Au

Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

107. Which order of ionization energy is correct?

Both b & c

Si > P

Mg > A1

Mg < A1

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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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