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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 number of elements in fourth period of periodic table is

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

Noble gases

Alkali metals

Halogens

Inert metals

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

Na < K < Rb < Mg

Mg < Na < Rb < K

Mg < K < Na < Rb

Mg < Na < K < Rb

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

VIA

IIA

IIIA

5. Alkali metals in each period have

Highest electronegativity

Smallest size

Highest IE

Lowest IE

6. Which one is not an ionic hydride?

NaH

CsH

LiH

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

d – block elements

p – block elements

s – block elements

f – block elements

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

Bohr

Dobereiner

Lother Meyer

Newlands

9. The highly electronegativity atom is

10. Mark the correct statement

The ionization energy of calcium is lower than that of barium

The ionization energy of calcium is than that of beryllium

The ionization energy of calcium is higher than that of magnesium

The ionization energy of calcium is lower than that of strontium

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

Cu, Fe, Au

Ag, Au, Hg

Cu, Ag, Au

Cu, Hg, Au

12. The elements which behave as metalloid is:

Pt & I

Br & I

AI & Zn

Rb & Cs

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

Ionization energy

Melting & boiling points

Atomic radii

Atomic volume

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

15. Mark the correct statement

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

All lanthanides are present in the same group

16. Which of the following possess maximum hydration power?

K⁺

Na⁺

Ca⁺²

Mg⁺²

17. Non-metals usually form ________ oxides.

Acidic

Neutral

All of the above

Amphoteric

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

Group IIA

Zero

VIIA

IVA

19. Magnesium keeps on burning in

Co₂

N₂ as well as Co₂

N₂

N₂O

20. Mark the elements that belong to same period:

Li, Na, K

H, He, F

Cr, In, Pb

Ca, Cr, Zn

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

Atomic number

Valence electrons

Atomic mass

Valency

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

Ionization energy

Atomic radii

m.P and B.P

Atomic volume

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

Ionization energy of elements

Coordination number of icons

BP of elements

MP of elements

24. Which statement is correct?

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

Hydrogen resembles in properties with IIA, IVA and VIA elements

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

Isobars

Isotropes

Isomers

Isotopes

Page 2 of 5

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

Alkali metals (I-A)

Group-18 elements (VIII-A)

Group-14 elements (IV-A)

Halogens (VII-A)

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

28. Seventh period contains ____________ normal elements

29. Chemically the most similar pair of elements is

Ti, Zr

Cu, S

Na, Al

Zr, Hf

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

31. Hydrogen resembles with carbon because of having

Homovalent (show same valency)

Remarkable reducing properties

Similar physical state

Same number of electrons in the valence shell

32. Which of the pair of metalloids?

Na and K

Cu and Au

F and U

As and Sb

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

Hydrogen

Germanium

Sodium

Copper

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

Group IV-A

Group II-A

Group VII-A

Group VI-A

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

36. Which of the following has highest electropositive character?

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

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

Rare earth metals

Alkali metals

Inert gases

Alkaline earth metals

39. 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, F and Br

Br, Cl and F

F, Cl and Br

Cl, Br and F

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

d – block elements

p – block elements

f – block elements

s – block elements

41. Which one is the strongest reducing agent?

42. The electronegativity of Sodium is

1.5

0.9

1.8

1.2

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

Li, Na, K

Na, Mg, C

I, Br, CI

C, N, O

44. 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 number of isotopes it has

The formula of its oxides

Acidic or basic nature of oxides

Charge on its ions

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

Lu > Ce

Ba > Mg

B > Ga

Cl > I

46. 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

47. Mark the Dobereiner triad

Zn, Cr, Na

Ne, Ar, K

B, C, Si

Cl, Br, I

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

Bonding behavior

Ionization potential

Neutron/proton ration

Electronegativity

49. The element with highest first ionization energy is

50. The electronegativity of Si is

1.2

1.5

1.8

2.1

Page 3 of 5

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

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

F C O Cl Br

F O C Cl Br

C O F Cl Br

F Cl Br O C

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

All are stable

H-

Cl-

H+

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

Data is insufficient

Exothermic

Endothermic

A or b

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

Henry Becquerel’s natural radioactivity

x-rays by Roentgen

Location of nucleus by Rutherford

Atomic number by Moseley

56. Which order of ionization energy is correct?

Mg > A1

Mg < A1

Si > P

Both b & c

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

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

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

58. 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

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

Hydrogen

Germanium

Copper

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

VII

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

None

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

Alkaline earths

Rare earths

Actinides

Inert gases

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

64. The periodic table consists of

7 horizontal and 7 vertical series

8 horizontal and 7 vertical series

7 horizontal and 18 vertical series

8 horizontal and 18 vertical series

65. Elements with similar chemical properties appear in 1 the

Right upper corner

Same family

Same period

p block elements

66. Oxidation state of an atomic represent

No of e gained or/lost

No of e lost

None

No of e gained

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

Both are electropositive

All

Similar electronic configuration

Both are not found in free state

68. Which of the following elements is most electronegative?

Fluorine

Nitrogen

Chlorine

Oxygen

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

Chemical properties

Physical properties

All

Properties of their compounds

70. 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

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

Density

Volume

Atomic numbers

Atomic masses

72. Noble gases are named so because they are

Inert

Zero group element

All

Having completely filled valence shell

73. The element with atomic number 14 belongs to

5th period

4th period

2nd period

3rd period

74. Which one has least ionization Potential?

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

f-block

s-block

d-block

p-block

Page 4 of 5

76. Variable valency is generally exhibited by

None of these

Metallic elements

Normal elements

Transition elements

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

9, 17

7, 15

6, 12

3, 20

78. Which of the following pairs are chemically dissimilar?

Ba and Sr

Na and K

Ca and Zn

Zr and Hf

79. The atomic radii decrease by increasing atomic number in

Alkaline earth metal

Alkali metal

Elements from Li to Ne

Halogens

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

Atomic volume

Atomic mass

Atomic number

Number of valence electrons

81. Higher value of electron affinity means

Atom may form di-positive ion

Atom will gain electron easily

Atom will lose electron easily

The reason is unknown

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

One

Two

Zero

Three

83. Inner transition elements are called

All

Rare earth metals

Lanthanides

Actinides

84. 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

Ionization energy

Electron affinity

Electronegativity

Valency

85. The atomic radii decreases by increasing atomic number in

Alkaline earth metal

Alkali metal

Halogens

Elements from Li to Ne

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

87. Metallic characters of alkali metals

Increase down the group

No regular trend

Decrease down the group

Remain same

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

Group VIII

Group IA

Group IB

Group VII A

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

Oxygen

Barium

Cesium

Argon

90. Mark the correct statement

Melting points of halogens remains the same throughout the group

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

Melting points of halogens increases down the group

Melting points of halogens decrease down the group

91. Californium is the member of

Actinide series

Alkali metals

Lanthanide series

Alkaline earth metals

92. The longest period in the modern periodic table is

7th

5th

2nd and 3rd both

6th

93. Oxidation state of an atom represent

Number of electrons gained

Apparent charge I compound

Its vacancies

Number of electrons lost

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

95. Which has largest first ionization energy?

96. Metals form halides which are

Covalent

Polymeric

Ionic

All

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

98. White enamel of our teeth is

CaU₂

CaBr₂

Ca₃ (PO4)₂

CaF₂

99. Mark the correct statement

Na⁺ is smaller than Na atom

Cl⁺ (ions are equal in size)

Na⁺ is larger than Na atom

Cl⁺ is smaller than Cl atom

100. Which one is more acidic?

Al₂O₃

As₂O₃

Cl₂O₇

Wa₂O₂

Page 5 of 5

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

Cl < Sb < P < As < S

Sb < As < Cl < S < P

As < Cl < P < S < Sb

Sb < As < S < P < Cl

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

Rutherford

New lands

Dobereiner

Lother Meyer

103. Inner transition elements are called

All

Rare earth metals

Lanthanides

Actinides

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

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

106. 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

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

O– ion has comparatively larger size oxygen atom

Oxygen has high electron affinity

107. Shielding effect across the period

Increases

Decreases

Remains constant

Cannot be predicted

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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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