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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. The atomic radii decreases by increasing atomic number in

Halogens

Alkaline earth metal

Elements from Li to Ne

Alkali metal

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

Germanium

Hydrogen

Copper

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

Atomic volume

Ionization energy

Melting & boiling points

Atomic radii

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

5. Shielding effect across the period

Cannot be predicted

Remains constant

Decreases

Increases

6. Which of the following possess maximum hydration power?

K⁺

Na⁺

Ca⁺²

Mg⁺²

7. Mark the correct statement

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

Cl⁺ (ions are equal in size)

Cl⁺ is smaller than Cl atom

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

Barium

Oxygen

Cesium

Argon

9. Mark the Dobereiner triad

Cl, Br, I

Zn, Cr, Na

B, C, Si

Ne, Ar, K

10. Inner transition elements are called

Actinides

Rare earth metals

All

Lanthanides

11. Noble gases are named so because they are

Inert

Having completely filled valence shell

All

Zero group element

12. Oxidation state of an atom represent

Apparent charge I compound

Number of electrons gained

Number of electrons lost

Its vacancies

13. Magnesium keeps on burning in

N₂O

N₂

N₂ as well as Co₂

Co₂

14. Which one is more acidic?

Al₂O₃

Wa₂O₂

Cl₂O₇

As₂O₃

15. Which of the following pairs are chemically dissimilar?

Ba and Sr

Ca and Zn

Zr and Hf

Na and K

16. Alkali metals in each period have

Highest electronegativity

Smallest size

Highest IE

Lowest IE

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

Cu, Fe, Au

Cu, Hg, Au

Ag, Au, Hg

Cu, Ag, Au

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

Mg < Na < K < Rb

Mg < K < Na < Rb

Na < K < Rb < Mg

Mg < Na < Rb < K

19. The element with atomic number 14 belongs to

2nd period

4th period

3rd period

5th period

20. Which one is the strongest reducing agent?

21. Mark the correct statement

All halogens are present in the same period

All lanthanides are present in the same group

All the alkali metals are present in the same period

All the noble gases are present in the same period

22. White enamel of our teeth is

CaU₂

Ca₃ (PO4)₂

CaBr₂

CaF₂

23. 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 has comparatively larger size oxygen atom

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

24. Higher value of electron affinity means

The reason is unknown

Atom may form di-positive ion

Atom will lose electron easily

Atom will gain electron easily

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

d – block elements

s – block elements

f – block elements

p – block elements

Page 2 of 5

26. 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 IB

Group VIII

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

28. Which of the following has highest electropositive character?

29. The elements which behave as metalloid is:

Rb & Cs

AI & Zn

Pt & I

Br & I

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

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

32. Elements with similar chemical properties appear in 1 the

p block elements

Same family

Right upper corner

Same period

33. Oxidation state of an atomic represent

No of e gained

No of e lost

No of e gained or/lost

None

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

Isomers

Isotopes

Isotropes

Isobars

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

Actinides

Alkaline earths

Inert gases

Rare earths

36. Mark the elements that belong to same period:

Li, Na, K

Ca, Cr, Zn

H, He, F

Cr, In, Pb

37. Mark the correct statement

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

Melting points of halogens remains the same throughout the group

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

39. Metallic characters of alkali metals

Decrease down the group

Increase down the group

Remain same

No regular trend

40. Variable valency is generally exhibited by

Transition elements

None of these

Normal elements

Metallic elements

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

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

The atomic number

The shielding constant

Both the nuclear charge and the shielding constant

The charge on the nucleus

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

F O C Cl Br

F Cl Br O C

F C O Cl Br

C O F Cl Br

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

None

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

46. 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

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

Elements with atomic number 11 and 33

Elements with atomic numbers 20 and 40

Elements with atomic number 17 and 38

Elements with atomic number 17 and 53

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

Group IV-A

Group VII-A

Group VI-A

Group II-A

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

B > Ga

Ba > Mg

Cl > I

Lu > Ce

50. The highly electronegativity atom is

Page 3 of 5

51. Non-metals usually form ________ oxides.

Acidic

All of the above

Amphoteric

Neutral

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

Similar electronic configuration

Both are not found in free state

All

Both are electropositive

53. Which of the pair of metalloids?

F and U

As and Sb

Na and K

Cu and Au

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

d-block

s-block

p-block

f-block

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

Exothermic

Endothermic

Data is insufficient

A or b

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

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

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

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

6, 12

7, 15

3, 20

9, 17

60. Chemically the most similar pair of elements is

Cu, S

Ti, Zr

Zr, Hf

Na, Al

61. The longest period in the modern periodic table is

5th

6th

7th

2nd and 3rd both

62. Hydrogen resembles with carbon because of having

Similar physical state

Homovalent (show same valency)

Same number of electrons in the valence shell

Remarkable reducing properties

63. Which one has least ionization Potential?

64. The electronegativity of Sodium is

1.8

0.9

1.2

1.5

65. Which one is not an ionic hydride?

NaH

CsH

LiH

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

Both are electropositive

Similar outer most shell electronic configuration

All

Both form ionic compounds

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

IIIA

VIA

IIA

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

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)

All above statements are correct

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

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

Atomic masses

Density

Volume

Atomic numbers

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

IVA

VIIA

Group IIA

Zero

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

Atomic mass

Valency

Atomic number

Valence electrons

72. The element with highest first ionization energy is

73. 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

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

Three

Zero

One

Two

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

Rutherford

Lother Meyer

Dobereiner

New lands

Page 4 of 5

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

Halogens

Alkali metals

Inert metals

Noble gases

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

Atomic volume

Number of valence electrons

Atomic mass

Atomic number

78. Which of the following elements is most electronegative?

Fluorine

Chlorine

Nitrogen

Oxygen

79. 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

Electronegativity

Electron affinity

Valency

Ionization energy

80. 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 formula of its oxides

Acidic or basic nature of oxides

The number of isotopes it has

81. Inner transition elements are called

Lanthanides

Actinides

Rare earth metals

All

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

d – block elements

p – block elements

f – block elements

s – block elements

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

Lother Meyer

Dobereiner

Newlands

Bohr

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

Ionization energy of elements

BP of elements

MP of elements

Coordination number of icons

85. Which order of ionization energy is correct?

Mg < A1

Mg > A1

Si > P

Both b & c

86. Mark the correct statement

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

The ionization energy of calcium is lower than that of barium

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

Chemical properties

Physical properties

All

Properties of their compounds

88. The periodic table consists of

7 horizontal and 7 vertical series

7 horizontal and 18 vertical series

8 horizontal and 18 vertical series

8 horizontal and 7 vertical series

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

Ionization potential

Bonding behavior

Electronegativity

Neutron/proton ration

90. Californium is the member of

Actinide series

Lanthanide series

Alkaline earth metals

Alkali metals

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

Halogens (VII-A)

Group-14 elements (IV-A)

Alkali metals (I-A)

Group-18 elements (VIII-A)

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

Germanium

Copper

Sodium

Hydrogen

93. 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:

Br, Cl and F

F, Cl and Br

Cl, F and Br

Cl, Br and F

94. The atomic radii decrease by increasing atomic number in

Elements from Li to Ne

Alkali metal

Halogens

Alkaline earth metal

95. Which has largest first ionization energy?

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

H+

Cl-

All are stable

H-

97. 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

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

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

100. The electronegativity of Si is

2.1

1.5

1.8

1.2

Page 5 of 5

101. Metals form halides which are

Covalent

All

Polymeric

Ionic

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

Li, Na, K

C, N, O

I, Br, CI

Na, Mg, C

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

VII

104. 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

105. 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

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

107. Seventh period contains ____________ normal elements

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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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