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

2. Mark the correct statement

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

All the noble gases are present in the same period

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

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

x-rays by Roentgen

Location of nucleus by Rutherford

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

F Cl Br O C

F C O Cl Br

C O F Cl Br

F O C Cl Br

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

Ionization energy

m.P and B.P

Atomic radii

Atomic volume

6. The element with highest first ionization energy is

7. Magnesium keeps on burning in

N₂ as well as Co₂

N₂

N₂O

Co₂

8. Which of the following has highest electropositive character?

9. Mark the correct statement

The ionization energy of calcium is higher than that of magnesium

The ionization energy of calcium is lower than that of strontium

The ionization energy of calcium is lower than that of barium

The ionization energy of calcium is than that of beryllium

10. The electronegativity of Si is

1.5

1.2

2.1

1.8

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

12. The highly electronegativity atom is

13. Alkali metals in each period have

Highest electronegativity

Smallest size

Highest IE

Lowest IE

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

Properties of their compounds

Physical properties

All

Chemical properties

15. Which one is more acidic?

Al₂O₃

Cl₂O₇

Wa₂O₂

As₂O₃

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

17. Oxidation state of an atom represent

Number of electrons gained

Its vacancies

Number of electrons lost

Apparent charge I compound

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

Lu > Ce

Ba > Mg

Cl > I

B > Ga

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

Bonding behavior

Ionization potential

Neutron/proton ration

Electronegativity

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

VII

21. Which of the following possess maximum hydration power?

Ca⁺²

Mg⁺²

K⁺

Na⁺

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

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

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

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

Page 2 of 5

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

Dobereiner

Rutherford

New lands

Lother Meyer

27. Seventh period contains ____________ normal elements

28. Californium is the member of

Alkali metals

Lanthanide series

Alkaline earth metals

Actinide series

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

Cu, Ag, Au

Cu, Fe, Au

Cu, Hg, Au

Ag, Au, Hg

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

Alkaline earths

Inert gases

Actinides

Rare earths

31. 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

Valency

Electronegativity

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

Mg < Na < Rb < K

Mg < Na < K < Rb

Na < K < Rb < Mg

Mg < K < Na < Rb

33. Metals form halides which are

Polymeric

Ionic

All

Covalent

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

Both form ionic compounds

All

Both are electropositive

Similar outer most shell electronic configuration

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

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

Sodium

Germanium

Hydrogen

Copper

37. Which one is the strongest reducing agent?

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

Elements with atomic number 17 and 38

Elements with atomic number 17 and 53

Elements with atomic number 11 and 33

Elements with atomic numbers 20 and 40

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

Isotropes

Isomers

Isobars

Isotopes

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

Similar electronic configuration

Both are electropositive

All

Both are not found in free state

41. White enamel of our teeth is

CaBr₂

CaU₂

Ca₃ (PO4)₂

CaF₂

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

H-

Cl-

H+

All are stable

43. Mark the correct statement

Na⁺ is smaller than Na atom

Cl⁺ is smaller than Cl atom

Na⁺ is larger than Na atom

Cl⁺ (ions are equal in size)

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

s-block

d-block

f-block

p-block

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

Group VI-A

Group IV-A

Group II-A

Group VII-A

46. Shielding effect across the period

Decreases

Increases

Remains constant

Cannot be predicted

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

Alkaline earth metals

Inert gases

Rare earth metals

Alkali metals

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

Atomic masses

Density

Volume

Atomic numbers

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

7, 15

9, 17

6, 12

3, 20

50. The longest period in the modern periodic table is

2nd and 3rd both

5th

6th

7th

Page 3 of 5

51. Mark the Dobereiner triad

Ne, Ar, K

Cl, Br, I

Zn, Cr, Na

B, C, Si

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

Group VIII

Group VII A

Group IB

Group IA

53. Variable valency is generally exhibited by

None of these

Metallic elements

Transition elements

Normal elements

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

s – block elements

p – block elements

d – block elements

f – block elements

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

Endothermic

Data is insufficient

A or b

Exothermic

56. The elements which behave as metalloid is:

Rb & Cs

Br & I

Pt & I

AI & Zn

57. The atomic radii decreases by increasing atomic number in

Alkaline earth metal

Halogens

Elements from Li to Ne

Alkali metal

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

None

59. Oxidation state of an atomic represent

No of e gained

None

No of e lost

No of e gained or/lost

60. Inner transition elements are called

Rare earth metals

All

Actinides

Lanthanides

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

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

Melting & boiling points

Ionization energy

Atomic volume

Atomic radii

63. Metallic characters of alkali metals

Decrease down the group

Remain same

Increase down the group

No regular trend

64. 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

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

Oxygen has high electron affinity

Oxygen is more electronegative

65. Which statement is correct?

Hydrogen resembles in properties with IIA, IIIA and VIIIA 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 IA, IVA and VIIA elements

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

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

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

67. Chemically the most similar pair of elements is

Na, Al

Ti, Zr

Zr, Hf

Cu, S

68. The atomic radii decrease by increasing atomic number in

Elements from Li to Ne

Halogens

Alkaline earth metal

Alkali metal

69. Which of the following pairs are chemically dissimilar?

Ca and Zn

Na and K

Zr and Hf

Ba and Sr

70. Which one has least ionization Potential?

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

Zero

VIIA

Group IIA

IVA

72. Which one is not an ionic hydride?

NaH

CsH

LiH

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

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

Inert metals

Alkali metals

Noble gases

Halogens

75. The element with atomic number 14 belongs to

2nd period

5th period

3rd period

4th period

Page 4 of 5

76. Mark the correct statement

Melting points of halogens decrease down the group

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

77. Inner transition elements are called

All

Actinides

Rare earth metals

Lanthanides

78. Non-metals usually form ________ oxides.

Amphoteric

All of the above

Neutral

Acidic

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

80. Hydrogen resembles with carbon because of having

Remarkable reducing properties

Same number of electrons in the valence shell

Homovalent (show same valency)

Similar physical state

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

The atomic number

The charge on the nucleus

The shielding constant

Both the nuclear charge and the shielding constant

82. Which order of ionization energy is correct?

Mg > A1

Both b & c

Mg < A1

Si > P

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

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

IIIA

IIA

VIA

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

Atomic volume

Number of valence electrons

Atomic mass

Atomic number

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

Group-14 elements (IV-A)

Halogens (VII-A)

Alkali metals (I-A)

Group-18 elements (VIII-A)

87. Noble gases are named so because they are

Having completely filled valence shell

Inert

All

Zero group element

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

Lother Meyer

Newlands

Bohr

Dobereiner

89. Mark the elements that belong to same period:

Cr, In, Pb

Li, Na, K

H, He, F

Ca, Cr, Zn

90. Which of the following elements is most electronegative?

Oxygen

Chlorine

Fluorine

Nitrogen

91. Higher value of electron affinity means

Atom will lose electron easily

Atom will gain electron easily

Atom may form di-positive ion

The reason is unknown

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

MP of elements

BP of elements

Ionization energy of elements

Coordination number of icons

93. 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

94. The periodic table consists of

7 horizontal and 18 vertical series

7 horizontal and 7 vertical series

8 horizontal and 7 vertical series

8 horizontal and 18 vertical series

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

Atomic number

Valency

Valence electrons

Atomic mass

96. Which has largest first ionization energy?

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

p – block elements

f – block elements

d – block elements

s – block elements

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

Three

One

Zero

Two

99. 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

The number of isotopes it has

Acidic or basic nature of oxides

100. Which of the pair of metalloids?

As and Sb

Na and K

Cu and Au

F and U

Page 5 of 5

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

Sb < As < S < P < Cl

As < Cl < P < S < Sb

Sb < As < Cl < S < P

Cl < Sb < P < As < S

102. The electronegativity of Sodium is

0.9

1.5

1.2

1.8

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

Barium

Oxygen

Cesium

Argon

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:

F, Cl and Br

Br, Cl and F

Cl, F and Br

Cl, Br and F

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

106. Elements with similar chemical properties appear in 1 the

p block elements

Same period

Right upper corner

Same family

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

Copper

Hydrogen

Germanium

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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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