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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 element with atomic number 26 will be found in group

2. 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

3. Which of the following pairs are chemically dissimilar?

Ba and Sr

Zr and Hf

Na and K

Ca and Zn

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

Alkali metals

Inert metals

Noble gases

Halogens

5. Mark the elements that belong to same period:

Ca, Cr, Zn

H, He, F

Li, Na, K

Cr, In, Pb

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

All

Similar electronic configuration

Both are electropositive

Both are not found in free state

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

8. Chemically the most similar pair of elements is

Ti, Zr

Cu, S

Na, Al

Zr, Hf

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

Volume

Density

Atomic masses

Atomic numbers

10. Metals form halides which are

Ionic

All

Covalent

Polymeric

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

Three

Zero

One

Two

12. 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

13. Mark the correct statement

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 strontium

The ionization energy of calcium is lower than that of barium

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

15. Mark the correct statement

Cl⁺ (ions are equal in size)

Cl⁺ is smaller than Cl atom

Na⁺ is smaller than Na atom

Na⁺ is larger than Na atom

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

VIA

IIIA

IIA

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

Ionization energy

Valency

Electron affinity

Electronegativity

18. The electronegativity of Si is

1.5

1.8

1.2

2.1

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

Na < K < Rb < Mg

Mg < K < Na < Rb

Mg < Na < Rb < K

Mg < Na < K < Rb

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

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

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

Alkali metals (I-A)

Halogens (VII-A)

Group-14 elements (IV-A)

Group-18 elements (VIII-A)

23. Metallic characters of alkali metals

No regular trend

Decrease down the group

Increase down the group

Remain same

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

Exothermic

Endothermic

A or b

Data is insufficient

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

All are stable

H+

Cl-

H-

Page 2 of 5

26. Higher value of electron affinity means

Atom may form di-positive ion

The reason is unknown

Atom will gain electron easily

Atom will lose electron easily

27. Which one is not an ionic hydride?

LiH

CsH

NaH

28. Seventh period contains ____________ normal elements

29. Noble gases are named so because they are

Having completely filled valence shell

Zero group element

All

Inert

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

Elements with atomic numbers 20 and 40

Elements with atomic number 17 and 53

Elements with atomic number 17 and 38

Elements with atomic number 11 and 33

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

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

Rare earth metals

Alkaline earth metals

Alkali metals

Inert gases

33. Which one is the strongest reducing agent?

34. The highly electronegativity atom is

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

Lother Meyer

Rutherford

New lands

Dobereiner

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

37. Oxidation state of an atomic represent

None

No of e gained

No of e gained or/lost

No of e lost

38. 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

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

Oxygen is more electronegative

39. The longest period in the modern periodic table is

6th

5th

2nd and 3rd both

7th

40. Elements with similar chemical properties appear in 1 the

Same family

Same period

Right upper corner

p block elements

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

As < Cl < P < S < Sb

Cl < Sb < P < As < S

Sb < As < Cl < S < P

Sb < As < S < P < Cl

42. Which of the following elements is most electronegative?

Oxygen

Chlorine

Nitrogen

Fluorine

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

44. Oxidation state of an atom represent

Number of electrons gained

Number of electrons lost

Its vacancies

Apparent charge I compound

45. Californium is the member of

Actinide series

Alkali metals

Lanthanide series

Alkaline earth metals

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

Atomic volume

Ionization energy

m.P and B.P

Atomic radii

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

Melting & boiling points

Ionization energy

Atomic radii

Atomic volume

48. 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

Charge on its ions

The formula of its oxides

The number of isotopes it has

49. Hydrogen resembles with carbon because of having

Homovalent (show same valency)

Same number of electrons in the valence shell

Remarkable reducing properties

Similar physical state

50. Which order of ionization energy is correct?

Mg < A1

Mg > A1

Si > P

Both b & c

Page 3 of 5

51. The atomic radii decreases by increasing atomic number in

Halogens

Elements from Li to Ne

Alkali metal

Alkaline earth metal

52. 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)

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

p-block

d-block

f-block

s-block

54. The element with highest first ionization energy is

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

Bonding behavior

Ionization potential

Neutron/proton ration

Electronegativity

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

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

Barium

Cesium

Oxygen

Argon

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

Number of valence electrons

Atomic volume

Atomic number

Atomic mass

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

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

Actinides

Rare earths

Alkaline earths

Inert gases

61. Which of the following possess maximum hydration power?

Mg⁺²

Na⁺

Ca⁺²

K⁺

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

Cu, Fe, Au

Cu, Hg, Au

Ag, Au, Hg

Cu, Ag, Au

63. Inner transition elements are called

Rare earth metals

Actinides

Lanthanides

All

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

Atomic number

Valency

Valence electrons

Atomic mass

65. The electronegativity of Sodium is

0.9

1.8

1.2

1.5

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

Copper

Sodium

Germanium

Hydrogen

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

Ba > Mg

Cl > I

B > Ga

Lu > Ce

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

Zero

IVA

Group IIA

VIIA

69. The element with atomic number 14 belongs to

4th period

5th period

2nd period

3rd period

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

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

Location of nucleus by Rutherford

x-rays by Roentgen

71. Variable valency is generally exhibited by

None of these

Normal elements

Transition elements

Metallic elements

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

Hydrogen

Copper

Germanium

73. Non-metals usually form ________ oxides.

Amphoteric

All of the above

Acidic

Neutral

74. Which one is more acidic?

Wa₂O₂

Cl₂O₇

As₂O₃

Al₂O₃

75. 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:

F, Cl and Br

Cl, F and Br

Br, Cl and F

Cl, Br and F

Page 4 of 5

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

F Cl Br O C

F O C Cl Br

C O F Cl Br

F C O Cl Br

77. The atomic radii decrease by increasing atomic number in

Elements from Li to Ne

Halogens

Alkaline earth metal

Alkali metal

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

Na, Mg, C

C, N, O

Li, Na, K

I, Br, CI

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

VII

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

6, 12

3, 20

7, 15

9, 17

81. The elements which behave as metalloid is:

Br & I

Rb & Cs

AI & Zn

Pt & I

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

Isotropes

Isomers

Isotopes

Isobars

83. 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

84. Shielding effect across the period

Decreases

Cannot be predicted

Increases

Remains constant

85. Which of the following has highest electropositive character?

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

87. Mark the Dobereiner triad

Ne, Ar, K

Cl, Br, I

Zn, Cr, Na

B, C, Si

88. White enamel of our teeth is

CaU₂

CaF₂

CaBr₂

Ca₃ (PO4)₂

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

None

90. Which has largest first ionization energy?

91. Inner transition elements are called

Rare earth metals

All

Actinides

Lanthanides

92. Which of the pair of metalloids?

Cu and Au

F and U

As and Sb

Na and K

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

94. Alkali metals in each period have

Lowest IE

Smallest size

Highest electronegativity

Highest IE

95. 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, IVA and VIA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

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

Chemical properties

Properties of their compounds

All

Physical properties

97. 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

Both form ionic compounds

All

98. Mark the correct statement

Melting points of halogens remains the same throughout the group

Melting points of halogens increases down the group

Melting points of halogens decrease down the group

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

99. Magnesium keeps on burning in

N₂ as well as Co₂

N₂

N₂O

Co₂

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

f – block elements

d – block elements

p – block elements

s – block elements

Page 5 of 5

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

Group VI-A

Group VII-A

Group IV-A

Group II-A

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

MP of elements

BP of elements

Ionization energy of elements

Coordination number of icons

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

Both the nuclear charge and the shielding constant

The shielding constant

The atomic number

The charge on the nucleus

104. Which one has least ionization Potential?

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

Lother Meyer

Bohr

Dobereiner

Newlands

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

f – block elements

s – block elements

d – block elements

p – block elements

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

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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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