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

Cesium

Barium

Argon

Oxygen

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

Atomic number

Atomic mass

Atomic volume

Number of valence electrons

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

4. Mark the Dobereiner triad

Zn, Cr, Na

B, C, Si

Ne, Ar, K

Cl, Br, I

5. The periodic table consists of

8 horizontal and 18 vertical series

8 horizontal and 7 vertical series

7 horizontal and 7 vertical series

7 horizontal and 18 vertical series

6. Oxidation state of an atom represent

Apparent charge I compound

Number of electrons gained

Its vacancies

Number of electrons lost

7. The element with atomic number 14 belongs to

2nd period

5th period

4th period

3rd period

8. Elements with similar chemical properties appear in 1 the

Right upper corner

p block elements

Same family

Same period

9. The highly electronegativity atom is

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

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

All above statements are correct

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)

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

Both are not found in free state

All

Similar electronic configuration

Both are electropositive

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

Sodium

Hydrogen

Germanium

Copper

13. Which of the following elements is most electronegative?

Fluorine

Nitrogen

Chlorine

Oxygen

14. 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

Electronegativity

Valency

Electron affinity

15. Noble gases are named so because they are

Inert

Zero group element

All

Having completely filled valence shell

16. White enamel of our teeth is

CaF₂

CaBr₂

CaU₂

Ca₃ (PO4)₂

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

Mg < K < Na < Rb

Na < K < Rb < Mg

Mg < Na < K < Rb

Mg < Na < Rb < K

18. 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

19. 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

20. Chemically the most similar pair of elements is

Na, Al

Zr, Hf

Cu, S

Ti, Zr

21. Mark the correct statement

All the noble gases are present in the same period

All lanthanides are present in the same group

All halogens are present in the same period

All the alkali metals are present in the same period

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

23. Which statement is correct?

Hydrogen resembles in properties with IIA, IVA and VIA elements

Hydrogen resembles in properties with IIIA, IVA and VA elements

Hydrogen resembles in properties with IA, IVA and VIIA elements

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

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

Atomic volume

Ionization energy

Atomic radii

m.P and B.P

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

F Cl Br O C

F C O Cl Br

F O C Cl Br

C O F Cl Br

Page 2 of 5

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

Endothermic

A or b

Data is insufficient

Exothermic

27. Shielding effect across the period

Increases

Cannot be predicted

Remains constant

Decreases

28. The electronegativity of Si is

2.1

1.8

1.2

1.5

29. Which of the following possess maximum hydration power?

K⁺

Mg⁺²

Na⁺

Ca⁺²

30. Seventh period contains ____________ normal elements

31. The longest period in the modern periodic table is

2nd and 3rd both

6th

5th

7th

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

Isomers

Isotopes

Isotropes

Isobars

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

34. 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

35. Oxidation state of an atomic represent

No of e lost

No of e gained

None

No of e gained or/lost

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

Newlands

Bohr

Lother Meyer

Dobereiner

37. Which has largest first ionization energy?

38. Which one is the strongest reducing agent?

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

New lands

Lother Meyer

Rutherford

Dobereiner

40. Metals form halides which are

All

Polymeric

Ionic

Covalent

41. Which one is not an ionic hydride?

NaH

LiH

CsH

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

Atomic numbers

Density

Volume

Atomic masses

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

Li, Na, K

C, N, O

Na, Mg, C

I, Br, CI

44. Inner transition elements are called

Actinides

Lanthanides

All

Rare earth metals

45. Variable valency is generally exhibited by

Metallic elements

Normal elements

Transition elements

None of these

46. Mark the elements that belong to same period:

H, He, F

Li, Na, K

Cr, In, Pb

Ca, Cr, Zn

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

None

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

Hydrogen

Germanium

Copper

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

Group VIII

Group IB

Group IA

Group VII A

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

Cu, Hg, Au

Ag, Au, Hg

Cu, Ag, Au

Cu, Fe, Au

Page 3 of 5

51. Which order of ionization energy is correct?

Mg > A1

Si > P

Both b & c

Mg < A1

52. Alkali metals in each period have

Lowest IE

Smallest size

Highest IE

Highest electronegativity

53. The atomic radii decrease by increasing atomic number in

Alkaline earth metal

Halogens

Elements from Li to Ne

Alkali metal

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

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

Zero

VIIA

Group IIA

IVA

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

Halogens (VII-A)

Alkali metals (I-A)

Group-18 elements (VIII-A)

Group-14 elements (IV-A)

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

Neutron/proton ration

Bonding behavior

Ionization potential

Electronegativity

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

f – block elements

s – block elements

d – block elements

p – block elements

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

Atomic radii

Atomic volume

Ionization energy

Melting & boiling points

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

Alkali metals

Noble gases

Inert metals

Halogens

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

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

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

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

Three

Zero

Two

One

65. Which of the pair of metalloids?

F and U

Na and K

As and Sb

Cu and Au

66. Mark the correct statement

Melting points of halogens remains the same throughout the group

Melting points of halogens decrease down the group

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

Melting points of halogens increases down the group

67. Which one has least ionization Potential?

68. The elements which behave as metalloid is:

Rb & Cs

AI & Zn

Br & I

Pt & I

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

70. The atomic radii decreases by increasing atomic number in

Halogens

Elements from Li to Ne

Alkali metal

Alkaline earth metal

71. 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

Both are electropositive

All

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

The charge on the nucleus

Both the nuclear charge and the shielding constant

The atomic number

The shielding constant

73. Inner transition elements are called

Rare earth metals

Lanthanides

All

Actinides

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

VII

75. 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 lower than that of barium

The ionization energy of calcium is than that of beryllium

Page 4 of 5

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

IIIA

IIA

VIA

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

Ionization energy of elements

BP of elements

Coordination number of icons

MP of elements

78. Hydrogen resembles with carbon because of having

Similar physical state

Remarkable reducing properties

Same number of electrons in the valence shell

Homovalent (show same valency)

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

Location of nucleus by Rutherford

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

x-rays by Roentgen

80. Which of the following has highest electropositive character?

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

Alkali metals

Inert gases

Alkaline earth metals

Rare earth metals

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

83. Metallic characters of alkali metals

Increase down the group

Decrease down the group

Remain same

No regular trend

84. 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 38

Elements with atomic number 17 and 53

Elements with atomic numbers 20 and 40

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

86. Which one is more acidic?

As₂O₃

Wa₂O₂

Cl₂O₇

Al₂O₃

87. Non-metals usually form ________ oxides.

Neutral

Acidic

All of the above

Amphoteric

88. Magnesium keeps on burning in

N₂ as well as Co₂

N₂O

N₂

Co₂

89. Higher value of electron affinity means

The reason is unknown

Atom will lose electron easily

Atom may form di-positive ion

Atom will gain electron easily

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

Group II-A

Group VII-A

Group VI-A

Group IV-A

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

Ba > Mg

Cl > I

Lu > Ce

B > Ga

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

Cl < Sb < P < As < S

As < Cl < P < S < Sb

Sb < As < Cl < S < P

Sb < As < S < P < Cl

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

f – block elements

d – block elements

p – block elements

s – block elements

94. Which of the following pairs are chemically dissimilar?

Na and K

Zr and Hf

Ca and Zn

Ba and Sr

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

Valence electrons

Valency

Atomic mass

Atomic number

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

9, 17

3, 20

6, 12

7, 15

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

Physical properties

Chemical properties

Properties of their compounds

All

98. Californium is the member of

Lanthanide series

Actinide series

Alkali metals

Alkaline earth metals

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

100. 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

Page 5 of 5

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

H+

Cl-

All are stable

H-

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

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

s-block

p-block

f-block

d-block

104. 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, F and Br

F, Cl and Br

Cl, Br and F

105. The element with highest first ionization energy is

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

107. The electronegativity of Sodium is

0.9

1.2

1.8

1.5

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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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