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MDCAT Chemistry Periodic Classification Of Elements & Periodicity Online Test

Malik TahirLast Updated: May 24, 2025

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

MDCAT 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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MDCAT Chemistry Periodic Classification Of Elements & Periodicity Test

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Page 1 of 5

Chemistry

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

Rutherford

Lother Meyer

Dobereiner

New lands

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

Germanium

Copper

Hydrogen

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

4. Elements with similar chemical properties appear in 1 the

Same family

p block elements

Right upper corner

Same period

5. 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

Ionization energy

Electronegativity

Valency

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

7. 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

8. Higher value of electron affinity means

Atom will gain electron easily

The reason is unknown

Atom will lose electron easily

Atom may form di-positive ion

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

VII

10. The electronegativity of Si is

1.8

2.1

1.2

1.5

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

Atomic numbers

Density

Atomic masses

Volume

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

Henry Becquerel’s natural radioactivity

x-rays by Roentgen

Atomic number by Moseley

Location of nucleus by Rutherford

13. 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

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

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

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

Group IIA

VIIA

Zero

IVA

15. The element with atomic number 14 belongs to

4th period

2nd period

3rd period

5th period

16. The atomic radii decreases by increasing atomic number in

Halogens

Alkali metal

Alkaline earth metal

Elements from Li to Ne

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

Coordination number of icons

BP of elements

MP of elements

Ionization energy of elements

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

Group VI-A

Group II-A

Group IV-A

Group VII-A

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

Mg < K < Na < Rb

Mg < Na < Rb < K

Na < K < Rb < Mg

Mg < Na < K < Rb

20. Hydrogen resembles with carbon because of having

Similar physical state

Same number of electrons in the valence shell

Homovalent (show same valency)

Remarkable reducing properties

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

p-block

s-block

f-block

d-block

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

Cl-

All are stable

H-

H+

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

Atomic mass

Number of valence electrons

Atomic volume

Atomic number

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

Sb < As < S < P < Cl

As < Cl < P < S < Sb

Sb < As < Cl < S < P

Cl < Sb < P < As < S

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

Cu, Fe, Au

Cu, Hg, Au

Cu, Ag, Au

Ag, Au, Hg

Page 2 of 5

26. Which one has least ionization Potential?

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

Both are not found in free state

All

Both are electropositive

Similar electronic configuration

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

29. Which one is more acidic?

Wa₂O₂

Al₂O₃

As₂O₃

Cl₂O₇

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

f – block elements

d – block elements

p – block elements

s – block elements

31. Which order of ionization energy is correct?

Mg > A1

Mg < A1

Si > P

Both b & c

32. Which of the pair of metalloids?

As and Sb

Na and K

F and U

Cu and Au

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

VIA

IIIA

IIA

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

Atomic volume

Atomic radii

Melting & boiling points

Ionization energy

35. Noble gases are named so because they are

Inert

Zero group element

All

Having completely filled valence shell

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

C O F Cl Br

F C O Cl Br

F Cl Br O C

F O C Cl Br

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

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

Bonding behavior

Ionization potential

Electronegativity

Neutron/proton ration

39. Inner transition elements are called

All

Lanthanides

Actinides

Rare earth metals

40. 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

41. The electronegativity of Sodium is

1.8

1.2

1.5

0.9

42. Which has largest first ionization energy?

43. The longest period in the modern periodic table is

7th

2nd and 3rd both

6th

5th

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

Properties of their compounds

All

Chemical properties

Physical properties

45. Magnesium keeps on burning in

Co₂

N₂

N₂ as well as Co₂

N₂O

46. 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 IIA, IVA and VIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

47. The atomic radii decrease by increasing atomic number in

Halogens

Elements from Li to Ne

Alkali metal

Alkaline earth metal

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

49. Which one is not an ionic hydride?

CsH

NaH

LiH

50. 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

Oxygen has high electron affinity

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

O– ion has comparatively larger size oxygen atom

Page 3 of 5

51. Which of the following elements is most electronegative?

Oxygen

Fluorine

Chlorine

Nitrogen

52. Oxidation state of an atom represent

Apparent charge I compound

Its vacancies

Number of electrons lost

Number of electrons gained

53. Californium is the member of

Lanthanide series

Alkali metals

Alkaline earth metals

Actinide series

54. White enamel of our teeth is

CaBr₂

CaF₂

Ca₃ (PO4)₂

CaU₂

55. Which of the following possess maximum hydration power?

Na⁺

Ca⁺²

K⁺

Mg⁺²

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

57. The highly electronegativity atom is

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

The shielding constant

The atomic number

Both the nuclear charge and the shielding constant

The charge on the nucleus

59. Chemically the most similar pair of elements is

Na, Al

Ti, Zr

Cu, S

Zr, Hf

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

Both are electropositive

All

Similar outer most shell electronic configuration

Both form ionic compounds

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

f – block elements

d – block elements

s – block elements

p – block elements

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

Two

Zero

One

Three

63. The periodic table consists of

8 horizontal and 18 vertical series

7 horizontal and 7 vertical series

8 horizontal and 7 vertical series

7 horizontal and 18 vertical series

64. Seventh period contains ____________ normal elements

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

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

I, Br, CI

Na, Mg, C

C, N, O

Li, Na, K

67. Shielding effect across the period

Increases

Cannot be predicted

Decreases

Remains constant

68. Variable valency is generally exhibited by

Metallic elements

Transition elements

Normal elements

None of these

69. Metals form halides which are

Covalent

All

Polymeric

Ionic

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

None

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

Group-18 elements (VIII-A)

Group-14 elements (IV-A)

Halogens (VII-A)

Alkali metals (I-A)

72. Mark the elements that belong to same period:

Cr, In, Pb

Li, Na, K

Ca, Cr, Zn

H, He, F

73. Which of the following has highest electropositive character?

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

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

7, 15

3, 20

6, 12

9, 17

Page 4 of 5

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

Hydrogen

Copper

Germanium

Sodium

77. Alkali metals in each period have

Smallest size

Highest electronegativity

Lowest IE

Highest IE

78. Which one is the strongest reducing agent?

79. 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

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

Rare earth metals

Inert gases

Alkaline earth metals

Alkali metals

81. 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

Acidic or basic nature of oxides

The number of isotopes it has

82. 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

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

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

Data is insufficient

Exothermic

A or b

Endothermic

85. The elements which behave as metalloid is:

AI & Zn

Br & I

Rb & Cs

Pt & I

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

87. Non-metals usually form ________ oxides.

Neutral

Amphoteric

All of the above

Acidic

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

Halogens

Noble gases

Inert metals

Alkali metals

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

Atomic volume

m.P and B.P

Atomic radii

Ionization energy

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

Cl > I

B > Ga

Lu > Ce

Ba > Mg

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

Barium

Oxygen

Argon

Cesium

92. The element with highest first ionization energy is

93. Oxidation state of an atomic represent

No of e gained

No of e gained or/lost

No of e lost

None

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

Atomic number

Valency

Atomic mass

Valence electrons

95. Which of the following pairs are chemically dissimilar?

Zr and Hf

Ca and Zn

Ba and Sr

Na and K

96. Mark the Dobereiner triad

Zn, Cr, Na

Ne, Ar, K

B, C, Si

Cl, Br, I

97. Mark the correct statement

The ionization energy of calcium is higher than that of magnesium

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

98. Metallic characters of alkali metals

Decrease down the group

No regular trend

Remain same

Increase down the group

99. Mark the correct statement

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

Melting points of halogens decrease down the group

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

Page 5 of 5

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

102. Inner transition elements are called

Actinides

Lanthanides

Rare earth metals

All

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

Lother Meyer

Newlands

Dobereiner

Bohr

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

Isotropes

Isobars

Isomers

Isotopes

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

106. Mark the correct statement

Cl⁺ is smaller than Cl atom

Cl⁺ (ions are equal in size)

Na⁺ is larger than Na atom

Na⁺ is smaller than Na atom

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

Rare earths

Inert gases

Alkaline earths

Actinides

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Malik TahirLast Updated: May 24, 2025

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MDCAT Chemistry Periodic Classification Of Elements & Periodicity Online Test

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

MDCAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

MDCAT Chemistry Periodic Classification Of Elements & Periodicity Test

Chemistry

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Malik Tahir

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Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

MDCAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

MDCAT Chemistry Periodic Classification Of Elements & Periodicity Test

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