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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 element was not known when Mendeleev proposed his classification?

Hydrogen

Copper

Germanium

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

H+

All are stable

Cl-

H-

3. Which one is the strongest reducing agent?

4. The longest period in the modern periodic table is

7th

5th

2nd and 3rd both

6th

5. Shielding effect across the period

Remains constant

Increases

Cannot be predicted

Decreases

6. 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 IA, IVA and VIIA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

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

Alkaline earth metals

Alkali metals

Inert gases

Rare earth metals

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

B > Ga

Cl > I

Ba > Mg

Lu > Ce

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

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

Henry Becquerel’s natural radioactivity

Location of nucleus by Rutherford

x-rays by Roentgen

Atomic number by Moseley

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

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

Isomers

Isotropes

Isotopes

Isobars

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

VII

14. Metals form halides which are

Polymeric

Ionic

All

Covalent

15. 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

Electron affinity

Ionization energy

Electronegativity

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

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

Zero

VIIA

Group IIA

IVA

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

19. Mark the correct statement

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

All lanthanides are present in the same group

20. Oxidation state of an atomic represent

No of e gained

No of e lost

None

No of e gained or/lost

21. The element with highest first ionization energy is

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

All

Properties of their compounds

Chemical properties

Physical properties

23. 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

24. Magnesium keeps on burning in

N₂

N₂ as well as Co₂

Co₂

N₂O

25. The element with atomic number 14 belongs to

4th period

3rd period

5th period

2nd period

Page 2 of 5

26. White enamel of our teeth is

CaF₂

CaU₂

Ca₃ (PO4)₂

CaBr₂

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

Rutherford

Lother Meyer

Dobereiner

New lands

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

VIA

IIIA

IIA

29. Elements with similar chemical properties appear in 1 the

p block elements

Right upper corner

Same family

Same period

30. Alkali metals in each period have

Lowest IE

Highest IE

Highest electronegativity

Smallest size

31. Mark the correct statement

Melting points of halogens decrease down the group

Melting points of halogens remains the same throughout the group

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

Melting points of halogens increases down the group

32. Which of the following elements is most electronegative?

Nitrogen

Oxygen

Chlorine

Fluorine

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

None

34. Mark the correct statement

The ionization energy of calcium is lower than that of barium

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 higher than that of magnesium

35. Noble gases are named so because they are

All

Inert

Having completely filled valence shell

Zero group element

36. 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)

37. Inner transition elements are called

Lanthanides

Actinides

Rare earth metals

All

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

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

One

Three

Two

Zero

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

Halogens

Alkali metals

Noble gases

Inert metals

41. The elements which behave as metalloid is:

Pt & I

Br & I

Rb & Cs

AI & Zn

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

F O C Cl Br

F C O Cl Br

F Cl Br O C

C O F Cl Br

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

44. Chemically the most similar pair of elements is

Na, Al

Ti, Zr

Cu, S

Zr, Hf

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

Hydrogen

Sodium

Copper

Germanium

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

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

Group-14 elements (IV-A)

Halogens (VII-A)

Group-18 elements (VIII-A)

Alkali metals (I-A)

48. Variable valency is generally exhibited by

Metallic elements

Transition elements

None of these

Normal elements

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

50. Metallic characters of alkali metals

No regular trend

Increase down the group

Remain same

Decrease down the group

Page 3 of 5

51. Seventh period contains ____________ normal elements

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

Group IA

Group VII A

Group VIII

Group IB

53. Which order of ionization energy is correct?

Si > P

Mg < A1

Mg > A1

Both b & c

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

The charge on the nucleus

The shielding constant

Both the nuclear charge and the shielding constant

The atomic number

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

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

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

56. The periodic table consists of

7 horizontal and 7 vertical series

7 horizontal and 18 vertical series

8 horizontal and 7 vertical series

8 horizontal and 18 vertical series

57. Which of the following has highest electropositive character?

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

Ionization potential

Neutron/proton ration

Electronegativity

Bonding behavior

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

m.P and B.P

Ionization energy

Atomic radii

Atomic volume

60. Higher value of electron affinity means

Atom may form di-positive ion

Atom will gain electron easily

Atom will lose electron easily

The reason is unknown

61. Which one is more acidic?

Cl₂O₇

As₂O₃

Al₂O₃

Wa₂O₂

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

d-block

p-block

s-block

f-block

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

s – block elements

p – block elements

d – block elements

f – block elements

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

Data is insufficient

Exothermic

Endothermic

A or b

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

Sb < As < Cl < S < P

As < Cl < P < S < Sb

Cl < Sb < P < As < S

Sb < As < S < P < Cl

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

Mg < Na < Rb < K

Mg < K < Na < Rb

Mg < Na < K < Rb

Na < K < Rb < Mg

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

All

Similar electronic configuration

Both are not found in free state

Both are electropositive

68. 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?

Charge on its ions

The number of isotopes it has

The formula of its oxides

Acidic or basic nature of oxides

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

Number of valence electrons

Atomic mass

Atomic number

Atomic volume

70. Which of the following possess maximum hydration power?

Ca⁺²

Mg⁺²

Na⁺

K⁺

71. Mark the elements that belong to same period:

H, He, F

Cr, In, Pb

Li, Na, K

Ca, Cr, Zn

72. Inner transition elements are called

All

Lanthanides

Actinides

Rare earth metals

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

74. The atomic radii decrease by increasing atomic number in

Alkali metal

Alkaline earth metal

Halogens

Elements from Li to Ne

75. The highly electronegativity atom is

Page 4 of 5

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

Atomic radii

Ionization energy

Melting & boiling points

Atomic volume

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

7, 15

9, 17

6, 12

3, 20

78. Which of the following pairs are chemically dissimilar?

Ca and Zn

Zr and Hf

Ba and Sr

Na and K

79. Which one is not an ionic hydride?

LiH

NaH

CsH

80. The atomic radii decreases by increasing atomic number in

Elements from Li to Ne

Alkaline earth metal

Halogens

Alkali metal

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

Inert gases

Alkaline earths

Rare earths

Actinides

82. 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

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

Group VII-A

Group VI-A

Group IV-A

Group II-A

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

Lother Meyer

Bohr

Dobereiner

Newlands

85. Which one has least ionization Potential?

86. Which has largest first ionization energy?

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

Coordination number of icons

Ionization energy of elements

BP of elements

MP of elements

88. Oxidation state of an atom represent

Apparent charge I compound

Number of electrons lost

Number of electrons gained

Its vacancies

89. Californium is the member of

Alkaline earth metals

Alkali metals

Actinide series

Lanthanide series

90. 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

Br, Cl and F

Cl, Br and F

F, Cl and Br

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

p – block elements

d – block elements

s – block elements

f – block elements

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

93. The electronegativity of Si is

2.1

1.2

1.8

1.5

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

Density

Volume

Atomic numbers

Atomic masses

95. Which of the pair of metalloids?

F and U

Na and K

As and Sb

Cu and Au

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

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

Barium

Oxygen

Argon

Cesium

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

99. Hydrogen resembles with carbon because of having

Same number of electrons in the valence shell

Similar physical state

Remarkable reducing properties

Homovalent (show same valency)

100. Mark the Dobereiner triad

Zn, Cr, Na

B, C, Si

Cl, Br, I

Ne, Ar, K

Page 5 of 5

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

Atomic number

Atomic mass

Valence electrons

Valency

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

Cu, Fe, Au

Cu, Hg, Au

Ag, Au, Hg

Cu, Ag, Au

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

Both form ionic compounds

Both are electropositive

All

Similar outer most shell electronic configuration

104. Non-metals usually form ________ oxides.

Acidic

All of the above

Amphoteric

Neutral

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

106. The electronegativity of Sodium is

0.9

1.2

1.8

1.5

107. 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 will tend to resist the addition of another electron

Oxygen is more electronegative

Oxygen has high electron affinity

O– ion has comparatively larger size oxygen atom

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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

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

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