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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. Which one has least ionization Potential?

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

Oxygen

Barium

Cesium

Argon

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

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

Melting & boiling points

Atomic volume

Atomic radii

Ionization energy

5. Mark the elements that belong to same period:

Cr, In, Pb

Ca, Cr, Zn

Li, Na, K

H, He, F

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

m.P and B.P

Atomic radii

Ionization energy

Atomic volume

7. Inner transition elements are called

Lanthanides

Actinides

All

Rare earth metals

8. The element with highest first ionization energy is

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

Atomic mass

Atomic number

Valency

Valence electrons

10. The electronegativity of Sodium is

1.2

0.9

1.5

1.8

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

Atomic masses

Volume

Density

Atomic numbers

12. Which has largest first ionization energy?

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

14. Oxidation state of an atom represent

Number of electrons gained

Number of electrons lost

Its vacancies

Apparent charge I compound

15. Which of the following elements is most electronegative?

Chlorine

Fluorine

Nitrogen

Oxygen

16. The element with atomic number 14 belongs to

4th period

5th period

2nd period

3rd period

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

Physical properties

Properties of their compounds

Chemical properties

All

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

7, 15

6, 12

3, 20

9, 17

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

p – block elements

f – block elements

d – block elements

s – block elements

20. Which of the following pairs are chemically dissimilar?

Ca and Zn

Na and K

Ba and Sr

Zr and Hf

21. Mark the Dobereiner triad

Zn, Cr, Na

Ne, Ar, K

B, C, Si

Cl, Br, I

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

Both form ionic compounds

Similar outer most shell electronic configuration

All

Both are electropositive

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

Elements with atomic number 17 and 38

Elements with atomic number 11 and 33

Elements with atomic number 17 and 53

Elements with atomic numbers 20 and 40

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

Copper

Hydrogen

Sodium

Germanium

25. The longest period in the modern periodic table is

6th

7th

5th

2nd and 3rd both

Page 2 of 5

26. 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

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

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

Cu, Ag, Au

Cu, Fe, Au

Cu, Hg, Au

Ag, Au, Hg

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

Noble gases

Inert metals

Halogens

Alkali metals

30. Seventh period contains ____________ normal elements

31. Metals form halides which are

Polymeric

Covalent

All

Ionic

32. The atomic radii decrease by increasing atomic number in

Halogens

Alkaline earth metal

Elements from Li to Ne

Alkali metal

33. Metallic characters of alkali metals

No regular trend

Decrease down the group

Remain same

Increase down the group

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

All are stable

Cl-

H+

H-

35. The atomic radii decreases by increasing atomic number in

Alkaline earth metal

Alkali metal

Elements from Li to Ne

Halogens

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

BP of elements

MP of elements

Ionization energy of elements

Coordination number of icons

37. The periodic table consists of

8 horizontal and 7 vertical series

8 horizontal and 18 vertical series

7 horizontal and 7 vertical series

7 horizontal and 18 vertical series

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

Alkali metals (I-A)

Group-14 elements (IV-A)

Group-18 elements (VIII-A)

Halogens (VII-A)

39. Elements with similar chemical properties appear in 1 the

Same period

Right upper corner

p block elements

Same family

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

41. Non-metals usually form ________ oxides.

Amphoteric

All of the above

Neutral

Acidic

42. 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 strontium

The ionization energy of calcium is than that of beryllium

The ionization energy of calcium is lower than that of barium

43. Magnesium keeps on burning in

N₂

Co₂

N₂ as well as Co₂

N₂O

44. White enamel of our teeth is

CaF₂

CaBr₂

CaU₂

Ca₃ (PO4)₂

45. Chemically the most similar pair of elements is

Cu, S

Na, Al

Zr, Hf

Ti, Zr

46. Which one is not an ionic hydride?

CsH

NaH

LiH

47. 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 formula of its oxides

Charge on its ions

The number of isotopes it has

48. 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

Br, Cl and F

F, Cl and Br

Cl, F and Br

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

Neutron/proton ration

Bonding behavior

Ionization potential

Electronegativity

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

New lands

Rutherford

Lother Meyer

Dobereiner

Page 3 of 5

51. 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

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

53. Californium is the member of

Lanthanide series

Actinide series

Alkaline earth metals

Alkali metals

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

Na, Mg, C

Li, Na, K

I, Br, CI

C, N, O

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

Isomers

Isotropes

Isotopes

Isobars

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

B > Ga

Cl > I

Ba > Mg

Lu > Ce

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

Actinides

Inert gases

Alkaline earths

Rare earths

58. Which one is more acidic?

Wa₂O₂

Cl₂O₇

Al₂O₃

As₂O₃

59. 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

Electron affinity

Electronegativity

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

Group VII-A

Group VI-A

Group II-A

Group IV-A

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

VIIA

IVA

Zero

Group IIA

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

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

As < Cl < P < S < Sb

Cl < Sb < P < As < S

Sb < As < S < P < Cl

Sb < As < Cl < S < P

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

The atomic number

The charge on the nucleus

The shielding constant

Both the nuclear charge and the shielding constant

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

A or b

Exothermic

Endothermic

Data is insufficient

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

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

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

All above statements are correct

67. Which order of ionization energy is correct?

Mg > A1

Si > P

Mg < A1

Both b & c

68. The highly electronegativity atom is

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

Atomic number

Atomic mass

Atomic volume

Number of valence electrons

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

Inert gases

Alkaline earth metals

Alkali metals

Rare earth metals

71. Shielding effect across the period

Remains constant

Cannot be predicted

Decreases

Increases

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

73. Which of the following possess maximum hydration power?

Na⁺

K⁺

Mg⁺²

Ca⁺²

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

Newlands

Bohr

Lother Meyer

Dobereiner

75. Which of the pair of metalloids?

Na and K

As and Sb

F and U

Cu and Au

Page 4 of 5

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

VII

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

Mg < K < Na < Rb

Mg < Na < K < Rb

Mg < Na < Rb < K

Na < K < Rb < Mg

78. Variable valency is generally exhibited by

Normal elements

Transition elements

None of these

Metallic elements

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

Three

One

Zero

Two

80. Oxidation state of an atomic represent

No of e lost

No of e gained or/lost

No of e gained

None

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

F O C Cl Br

C O F Cl Br

F C O Cl Br

F Cl Br O C

82. Mark the correct statement

Cl⁺ is smaller than Cl atom

Cl⁺ (ions are equal in size)

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

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

p – block elements

d – block elements

s – block elements

f – block elements

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

s-block

f-block

p-block

d-block

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

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

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

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

89. Higher value of electron affinity means

The reason is unknown

Atom will gain electron easily

Atom will lose electron easily

Atom may form di-positive ion

90. Noble gases are named so because they are

Inert

Having completely filled valence shell

All

Zero group element

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

92. Mark the correct statement

Melting points of halogens increases down the group

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

Melting points of halogens remains the same throughout the group

Melting points of halogens decrease down the group

93. The elements which behave as metalloid is:

Br & I

Rb & Cs

AI & Zn

Pt & I

94. Which of the following has highest electropositive character?

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

Group VII A

Group IB

Group IA

Group VIII

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

Location of nucleus by Rutherford

Henry Becquerel’s natural radioactivity

x-rays by Roentgen

Atomic number by Moseley

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

Germanium

Hydrogen

Copper

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

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

None

100. Which statement is correct?

Hydrogen resembles in properties with IIA, IVA and VIA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

Page 5 of 5

101. Mark the correct statement

All the alkali metals are present in the same period

All lanthanides are present in the same group

All halogens are present in the same period

All the noble gases are present in the same period

102. Alkali metals in each period have

Smallest size

Lowest IE

Highest electronegativity

Highest IE

103. The electronegativity of Si is

1.2

1.5

1.8

2.1

104. Inner transition elements are called

Actinides

Rare earth metals

All

Lanthanides

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

IIIA

IIA

VIA

106. Hydrogen resembles with carbon because of having

Homovalent (show same valency)

Remarkable reducing properties

Same number of electrons in the valence shell

Similar physical state

107. Which one is the strongest reducing agent?

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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

Chemistry

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