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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. Modern periodic table has been divided in _________ blocks.

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

Ionization energy

Atomic radii

Melting & boiling points

Atomic volume

3. 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

4. Which order of ionization energy is correct?

Mg < A1

Both b & c

Mg > A1

Si > P

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

Copper

Hydrogen

Germanium

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

s – block elements

p – block elements

f – block elements

d – block elements

7. Higher value of electron affinity means

Atom will lose electron easily

The reason is unknown

Atom will gain electron easily

Atom may form di-positive ion

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

Na, Mg, C

I, Br, CI

Li, Na, K

C, N, O

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

Sodium

Germanium

Copper

Hydrogen

10. Inner transition elements are called

All

Rare earth metals

Lanthanides

Actinides

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

IIIA

VIA

IIA

12. 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

Oxygen is more electronegative

O– ion has comparatively larger size oxygen atom

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

13. Noble gases are named so because they are

Inert

Having completely filled valence shell

All

Zero group element

14. Which has largest first ionization energy?

15. Mark the correct statement

The ionization energy of calcium is than that of beryllium

The ionization energy of calcium is lower than that of barium

The ionization energy of calcium is higher than that of magnesium

The ionization energy of calcium is lower than that of strontium

16. The atomic radii decreases by increasing atomic number in

Alkali metal

Halogens

Alkaline earth metal

Elements from Li to Ne

17. 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

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

C O F Cl Br

F C O Cl Br

F O C Cl Br

F Cl Br O C

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

Group VII A

Group IA

Group VIII

Group IB

20. Mark the elements that belong to same period:

Cr, In, Pb

Ca, Cr, Zn

H, He, F

Li, Na, K

21. Which of the following pairs are chemically dissimilar?

Na and K

Ba and Sr

Zr and Hf

Ca and Zn

22. 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

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

24. Oxidation state of an atomic represent

No of e gained or/lost

No of e gained

None

No of e lost

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

Bohr

Newlands

Dobereiner

Lother Meyer

Page 2 of 5

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

27. Which of the following elements is most electronegative?

Fluorine

Oxygen

Chlorine

Nitrogen

28. The periodic table consists of

8 horizontal and 7 vertical series

7 horizontal and 18 vertical series

8 horizontal and 18 vertical series

7 horizontal and 7 vertical series

29. 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)

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

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

d – block elements

f – block elements

s – block elements

p – block elements

32. 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

Charge on its ions

The formula of its oxides

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

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

Lu > Ce

Ba > Mg

B > Ga

Cl > I

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

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

Cu, Hg, Au

Ag, Au, Hg

Cu, Fe, Au

Cu, Ag, Au

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

VII

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

s-block

f-block

p-block

d-block

39. Non-metals usually form ________ oxides.

All of the above

Amphoteric

Neutral

Acidic

40. Variable valency is generally exhibited by

Transition elements

None of these

Normal elements

Metallic elements

41. Which one is the strongest reducing agent?

42. The element with atomic number 14 belongs to

4th period

2nd period

5th period

3rd period

43. 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 53

Elements with atomic number 17 and 38

Elements with atomic numbers 20 and 40

44. Californium is the member of

Alkali metals

Lanthanide series

Actinide series

Alkaline earth metals

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

Alkali metals

Noble gases

Halogens

Inert metals

46. Which one has least ionization Potential?

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

48. The atomic radii decrease by increasing atomic number in

Halogens

Alkaline earth metal

Elements from Li to Ne

Alkali metal

49. 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

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

Page 3 of 5

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

9, 17

3, 20

6, 12

7, 15

52. The electronegativity of Si is

1.5

1.8

1.2

2.1

53. Inner transition elements are called

Rare earth metals

All

Actinides

Lanthanides

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

Group VI-A

Group II-A

Group IV-A

Group VII-A

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

56. 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

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

Both are electropositive

Similar electronic configuration

Both are not found in free state

All

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

Oxygen

Barium

Argon

Cesium

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

All are stable

H+

Cl-

H-

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

A or b

Exothermic

Data is insufficient

Endothermic

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

VIIA

IVA

Zero

Group IIA

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

The charge on the nucleus

The atomic number

The shielding constant

Both the nuclear charge and the shielding constant

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

Neutron/proton ration

Bonding behavior

Electronegativity

Ionization potential

64. Elements with similar chemical properties appear in 1 the

Same period

Right upper corner

Same family

p block elements

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

Number of valence electrons

Atomic mass

Atomic volume

Atomic number

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

67. 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

68. Which one is more acidic?

Al₂O₃

As₂O₃

Cl₂O₇

Wa₂O₂

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

m.P and B.P

Ionization energy

Atomic volume

Atomic radii

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

Physical properties

All

Chemical properties

Properties of their compounds

71. Mark the Dobereiner triad

Ne, Ar, K

Zn, Cr, Na

Cl, Br, I

B, C, Si

72. Seventh period contains ____________ normal elements

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

Isotropes

Isotopes

Isomers

Isobars

74. Mark the correct statement

All the noble gases are present in the same period

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

75. Which one is not an ionic hydride?

NaH

CsH

LiH

Page 4 of 5

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

77. Hydrogen resembles with carbon because of having

Remarkable reducing properties

Similar physical state

Homovalent (show same valency)

Same number of electrons in the valence shell

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

Volume

Density

Atomic masses

Atomic numbers

79. Chemically the most similar pair of elements is

Zr, Hf

Ti, Zr

Na, Al

Cu, S

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

Alkaline earths

Inert gases

Rare earths

Actinides

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

82. Oxidation state of an atom represent

Apparent charge I compound

Number of electrons gained

Number of electrons lost

Its vacancies

83. Metals form halides which are

Covalent

Polymeric

Ionic

All

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

Zero

Three

One

Two

85. 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

Cl, Br and F

Cl, F and Br

F, Cl and Br

86. The longest period in the modern periodic table is

5th

2nd and 3rd both

6th

7th

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

Lother Meyer

Rutherford

New lands

Dobereiner

88. Mark the correct statement

Cl⁺ (ions are equal in size)

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

Cl⁺ is smaller than Cl atom

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

Sb < As < S < P < Cl

Sb < As < Cl < S < P

Cl < Sb < P < As < S

As < Cl < P < S < Sb

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

MP of elements

Ionization energy of elements

BP of elements

Coordination number of icons

91. White enamel of our teeth is

CaBr₂

CaF₂

Ca₃ (PO4)₂

CaU₂

92. Which of the pair of metalloids?

Cu and Au

F and U

Na and K

As and Sb

93. The element with highest first ionization energy is

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

95. Which of the following has highest electropositive character?

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

None

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

Atomic mass

Valency

Atomic number

Valence electrons

98. Magnesium keeps on burning in

N₂ as well as Co₂

N₂O

N₂

Co₂

99. Which of the following possess maximum hydration power?

Ca⁺²

Na⁺

K⁺

Mg⁺²

100. Alkali metals in each period have

Smallest size

Highest IE

Highest electronegativity

Lowest IE

Page 5 of 5

101. The highly electronegativity atom is

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

Mg < Na < K < Rb

Na < K < Rb < Mg

Mg < K < Na < Rb

Mg < Na < Rb < K

103. 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 IIIA, IVA and VA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

104. The elements which behave as metalloid is:

AI & Zn

Br & I

Rb & Cs

Pt & I

105. Shielding effect across the period

Cannot be predicted

Decreases

Remains constant

Increases

106. Metallic characters of alkali metals

Increase down the group

No regular trend

Decrease down the group

Remain same

107. The electronegativity of Sodium is

0.9

1.5

1.8

1.2

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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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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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