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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?

Alkaline earths

Actinides

Inert gases

Rare earths

2. The highly electronegativity atom is

3. Metals form halides which are

All

Polymeric

Covalent

Ionic

4. 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

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

Bohr

Dobereiner

Newlands

Lother Meyer

6. Which of the following pairs are chemically dissimilar?

Zr and Hf

Ba and Sr

Na and K

Ca and Zn

7. Inner transition elements are called

All

Actinides

Lanthanides

Rare earth metals

8. 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

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

Copper

Hydrogen

Germanium

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

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

12. Which one is not an ionic hydride?

CsH

LiH

NaH

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

Atomic radii

Atomic volume

Ionization energy

Melting & boiling points

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

IVA

VIIA

Group IIA

Zero

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

f-block

s-block

d-block

p-block

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

I, Br, CI

Li, Na, K

C, N, O

Na, Mg, C

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

All

Properties of their compounds

Chemical properties

Physical properties

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

19. 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?

Acidic or basic nature of oxides

The number of isotopes it has

The formula of its oxides

Charge on its ions

20. Seventh period contains ____________ normal elements

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

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

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

24. Which statement is correct?

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 IIA, IVA and VIA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

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

Data is insufficient

Endothermic

Exothermic

A or b

Page 2 of 5

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

Number of valence electrons

Atomic number

Atomic volume

Atomic mass

27. Hydrogen resembles with carbon because of having

Remarkable reducing properties

Homovalent (show same valency)

Same number of electrons in the valence shell

Similar physical state

28. The elements which behave as metalloid is:

Pt & I

AI & Zn

Rb & Cs

Br & I

29. Metallic characters of alkali metals

No regular trend

Remain same

Increase down the group

Decrease down the group

30. The periodic table consists of

8 horizontal and 18 vertical series

8 horizontal and 7 vertical series

7 horizontal and 18 vertical series

7 horizontal and 7 vertical series

31. Oxidation state of an atomic represent

No of e gained

No of e gained or/lost

No of e lost

None

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

Argon

Oxygen

Barium

Cesium

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

Hydrogen

Copper

Germanium

Sodium

34. Noble gases are named so because they are

All

Having completely filled valence shell

Inert

Zero group element

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

Dobereiner

Lother Meyer

New lands

Rutherford

36. 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

Electron affinity

Electronegativity

Ionization energy

Valency

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

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

Cl-

H+

All are stable

H-

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

Isobars

Isotropes

Isomers

Isotopes

40. The electronegativity of Si is

1.8

1.5

2.1

1.2

41. Which of the following has highest electropositive character?

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

IIIA

IIA

VIA

43. 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, F and Br

Br, Cl and F

Cl, Br and F

44. Shielding effect across the period

Increases

Decreases

Remains constant

Cannot be predicted

45. Which of the following elements is most electronegative?

Fluorine

Nitrogen

Oxygen

Chlorine

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

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

48. Variable valency is generally exhibited by

Transition elements

Metallic elements

None of these

Normal elements

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

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

Page 3 of 5

51. The element with atomic number 14 belongs to

4th period

2nd period

3rd period

5th period

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

Atomic number

Valence electrons

Atomic mass

Valency

53. The electronegativity of Sodium is

0.9

1.5

1.8

1.2

54. The element with highest first ionization energy is

55. White enamel of our teeth is

Ca₃ (PO4)₂

CaBr₂

CaU₂

CaF₂

56. Oxidation state of an atom represent

Number of electrons lost

Number of electrons gained

Apparent charge I compound

Its vacancies

57. 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

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

BP of elements

Ionization energy of elements

MP of elements

Coordination number of icons

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

Volume

Density

Atomic numbers

Atomic masses

60. Non-metals usually form ________ oxides.

All of the above

Amphoteric

Acidic

Neutral

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

Ionization energy

Atomic volume

m.P and B.P

Atomic radii

62. Mark the elements that belong to same period:

Cr, In, Pb

H, He, F

Li, Na, K

Ca, Cr, Zn

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

7, 15

3, 20

9, 17

6, 12

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

Elements with atomic numbers 20 and 40

Elements with atomic number 11 and 33

Elements with atomic number 17 and 53

Elements with atomic number 17 and 38

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

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

Inert metals

Alkali metals

Noble gases

Halogens

67. Mark the correct statement

Melting points of halogens decrease down the group

Melting points of halogens increases 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

68. The longest period in the modern periodic table is

6th

5th

7th

2nd and 3rd both

69. Alkali metals in each period have

Lowest IE

Smallest size

Highest IE

Highest electronegativity

70. Which one has least ionization Potential?

71. Which one is more acidic?

Wa₂O₂

Cl₂O₇

Al₂O₃

As₂O₃

72. Inner transition elements are called

Lanthanides

Rare earth metals

All

Actinides

73. Which has largest first ionization energy?

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

Both are electropositive

Similar electronic configuration

All

Both are not found in free state

75. 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 higher than that of magnesium

The ionization energy of calcium is than that of beryllium

Page 4 of 5

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

Group VII-A

Group IV-A

Group VI-A

Group II-A

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

Cu, Fe, Au

Cu, Ag, Au

Cu, Hg, Au

Ag, Au, Hg

78. Californium is the member of

Actinide series

Alkali metals

Lanthanide series

Alkaline earth metals

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

VII

80. Which one is the strongest reducing agent?

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

Both form ionic compounds

All

Similar outer most shell electronic configuration

Both are electropositive

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

s – block elements

p – block elements

f – block elements

d – block elements

83. 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

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

Oxygen is more electronegative

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

F C O Cl Br

F O C Cl Br

F Cl Br O C

C O F Cl Br

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

p – block elements

d – block elements

f – block elements

s – block elements

86. 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

87. Which of the following possess maximum hydration power?

Na⁺

K⁺

Mg⁺²

Ca⁺²

88. 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

89. Mark the correct statement

All lanthanides are present in the same group

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

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

Two

Zero

Three

One

91. Elements with similar chemical properties appear in 1 the

Right upper corner

Same family

p block elements

Same period

92. Which of the pair of metalloids?

F and U

Cu and Au

Na and K

As and Sb

93. Mark the Dobereiner triad

Ne, Ar, K

B, C, Si

Zn, Cr, Na

Cl, Br, I

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

The atomic number

Both the nuclear charge and the shielding constant

The charge on the nucleus

The shielding constant

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

B > Ga

Ba > Mg

Cl > I

Lu > Ce

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

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

All above statements are correct

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

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

None

98. The atomic radii decreases by increasing atomic number in

Elements from Li to Ne

Alkaline earth metal

Halogens

Alkali metal

99. Magnesium keeps on burning in

Co₂

N₂

N₂O

N₂ as well as Co₂

100. Which order of ionization energy is correct?

Si > P

Mg > A1

Mg < A1

Both b & c

Page 5 of 5

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

102. The atomic radii decrease by increasing atomic number in

Elements from Li to Ne

Halogens

Alkali metal

Alkaline earth metal

103. Chemically the most similar pair of elements is

Na, Al

Zr, Hf

Cu, S

Ti, Zr

104. Mark the correct statement

Cl⁺ (ions are equal in size)

Na⁺ is larger than Na atom

Cl⁺ is smaller than Cl atom

Na⁺ is smaller than Na atom

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

Group-14 elements (IV-A)

Alkali metals (I-A)

Group-18 elements (VIII-A)

Halogens (VII-A)

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

Neutron/proton ration

Ionization potential

Electronegativity

Bonding behavior

107. Higher value of electron affinity means

Atom will gain electron easily

The reason is unknown

Atom may form di-positive ion

Atom will lose electron easily

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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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