Home/ECAT/ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

Maan AliLast Updated: April 19, 2025

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT 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.
Test Helpful For:	ECAT Entry Test Chemistry Online Test Interview Questions about Chemisttry All Universities Entrance Test Recruitments Tests

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

Page 1 of 5

Chemistry

1. The longest period in the modern periodic table is

7th

6th

2nd and 3rd both

5th

2. Metallic characters of alkali metals

Decrease down the group

Increase down the group

No regular trend

Remain same

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

H-

H+

Cl-

All are stable

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

s – block elements

p – block elements

f – block elements

d – block elements

5. Which one is more acidic?

Cl₂O₇

Al₂O₃

Wa₂O₂

As₂O₃

6. Magnesium keeps on burning in

N₂

N₂O

N₂ as well as Co₂

Co₂

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

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

s-block

d-block

p-block

f-block

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

Alkali metals

Halogens

Inert metals

Noble gases

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

Exothermic

A or b

Endothermic

Data is insufficient

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

Group IV-A

Group VI-A

Group VII-A

Group II-A

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

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

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

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

BP of elements

Ionization energy of elements

MP of elements

Coordination number of icons

14. 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 will tend to resist the addition of another electron

O– ion has comparatively larger size oxygen atom

Oxygen is more electronegative

Oxygen has high electron affinity

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

IIA

VIA

IIIA

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

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

18. 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

19. The atomic radii decreases by increasing atomic number in

Halogens

Alkaline earth metal

Elements from Li to Ne

Alkali metal

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

Barium

Oxygen

Cesium

Argon

21. Mark the Dobereiner triad

Zn, Cr, Na

B, C, Si

Ne, Ar, K

Cl, Br, I

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

7, 15

9, 17

6, 12

3, 20

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

Group-14 elements (IV-A)

Group-18 elements (VIII-A)

Alkali metals (I-A)

Halogens (VII-A)

24. The element with atomic number 14 belongs to

4th period

2nd period

5th period

3rd period

25. Which one is not an ionic hydride?

CsH

NaH

LiH

Page 2 of 5

26. Variable valency is generally exhibited by

Normal elements

Transition elements

None of these

Metallic elements

27. 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

28. Shielding effect across the period

Remains constant

Increases

Cannot be predicted

Decreases

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

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

Atomic mass

Atomic number

Valency

Valence electrons

31. 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

32. Which one has least ionization Potential?

33. Oxidation state of an atom represent

Apparent charge I compound

Its vacancies

Number of electrons gained

Number of electrons lost

34. Higher value of electron affinity means

Atom will lose electron easily

Atom may form di-positive ion

Atom will gain electron easily

The reason is unknown

35. The highly electronegativity atom is

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

The atomic number

The charge on the nucleus

Both the nuclear charge and the shielding constant

The shielding constant

37. Mark the correct statement

Na⁺ is smaller than Na atom

Cl⁺ is smaller than Cl atom

Cl⁺ (ions are equal in size)

Na⁺ is larger than Na atom

38. Inner transition elements are called

All

Lanthanides

Rare earth metals

Actinides

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

Lu > Ce

Ba > Mg

Cl > I

B > Ga

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

Rare earths

Alkaline earths

Inert gases

Actinides

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

Group IIA

IVA

Zero

VIIA

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

Na, Mg, C

C, N, O

I, Br, CI

Li, Na, K

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

44. Oxidation state of an atomic represent

No of e gained

No of e lost

None

No of e gained or/lost

45. Mark the elements that belong to same period:

Li, Na, K

Cr, In, Pb

H, He, F

Ca, Cr, Zn

46. 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

Charge on its ions

The formula of its oxides

Acidic or basic nature of oxides

47. Seventh period contains ____________ normal elements

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

None

49. White enamel of our teeth is

CaU₂

CaF₂

CaBr₂

Ca₃ (PO4)₂

50. Non-metals usually form ________ oxides.

Amphoteric

Acidic

Neutral

All of the above

Page 3 of 5

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

Na < K < Rb < Mg

Mg < Na < K < Rb

Mg < K < Na < Rb

Mg < Na < Rb < K

52. Which of the following has highest electropositive character?

53. Mark the correct statement

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 increases down the group

Melting points of halogens decrease down the group

54. Chemically the most similar pair of elements is

Na, Al

Ti, Zr

Cu, S

Zr, Hf

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

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

Hydrogen

Germanium

Copper

Sodium

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

Number of valence electrons

Atomic number

Atomic mass

Atomic volume

58. Alkali metals in each period have

Highest IE

Lowest IE

Smallest size

Highest electronegativity

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

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

VII

61. Inner transition elements are called

Lanthanides

All

Rare earth metals

Actinides

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

Isomers

Isobars

Isotopes

Isotropes

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

Properties of their compounds

Physical properties

Chemical properties

All

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

x-rays by Roentgen

Location of nucleus by Rutherford

Atomic number by Moseley

Henry Becquerel’s natural radioactivity

65. 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

Valency

Ionization energy

Electron affinity

Electronegativity

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

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

Cl < Sb < P < As < S

As < Cl < P < S < Sb

Sb < As < S < P < Cl

Sb < As < Cl < S < P

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

Copper

Germanium

Hydrogen

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

Atomic numbers

Atomic masses

Density

Volume

70. The electronegativity of Si is

2.1

1.5

1.2

1.8

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

F O C Cl Br

F Cl Br O C

C O F Cl Br

F C O Cl Br

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

Atomic radii

Ionization energy

m.P and B.P

Atomic volume

73. The atomic radii decrease by increasing atomic number in

Alkaline earth metal

Elements from Li to Ne

Halogens

Alkali metal

74. Noble gases are named so because they are

All

Inert

Zero group element

Having completely filled valence shell

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

Page 4 of 5

76. The elements which behave as metalloid is:

Rb & Cs

Br & I

AI & Zn

Pt & I

77. The element with highest first ionization energy is

78. Metals form halides which are

Ionic

Covalent

Polymeric

All

79. Which of the following elements is most electronegative?

Nitrogen

Fluorine

Oxygen

Chlorine

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

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

Neutron/proton ration

Electronegativity

Bonding behavior

Ionization potential

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

One

Three

Zero

Two

83. 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

84. Which of the pair of metalloids?

Na and K

F and U

Cu and Au

As and Sb

85. Which one is the strongest reducing agent?

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

87. 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, Br and F

Br, Cl and F

Cl, F and Br

F, Cl and Br

88. Mark the correct statement

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

The ionization energy of calcium is lower than that of barium

89. Elements with similar chemical properties appear in 1 the

Right upper corner

p block elements

Same family

Same period

90. Which has largest first ionization energy?

91. 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

92. 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

93. Which order of ionization energy is correct?

Mg < A1

Si > P

Both b & c

Mg > A1

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

95. Which of the following possess maximum hydration power?

Ca⁺²

K⁺

Na⁺

Mg⁺²

96. Which of the following pairs are chemically dissimilar?

Ba and Sr

Zr and Hf

Na and K

Ca and Zn

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

Group IB

Group VIII

Group VII A

Group IA

98. Californium is the member of

Alkaline earth metals

Lanthanide series

Actinide series

Alkali metals

99. Which statement is correct?

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

Hydrogen resembles in properties with IIA, IIIA and VIIIA elements

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

Melting & boiling points

Ionization energy

Atomic volume

Atomic radii

Page 5 of 5

101. 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

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

103. The electronegativity of Sodium is

1.5

1.2

0.9

1.8

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

f – block elements

p – block elements

s – block elements

d – block elements

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

Dobereiner

Bohr

Newlands

Lother Meyer

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

Dobereiner

Lother Meyer

New lands

Rutherford

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

Cu, Hg, Au

Cu, Ag, Au

Cu, Fe, Au

Ag, Au, Hg

You Can Learn and Gain more Knowledge through our Online Quiz and Testing system Just Search your desired Preparation subject at Gotest.

ECAT Chemistry Environmental Chemistry Test Online
ECAT Chemistry Common Chemical Industries in Pakistan Test O...
ECAT Chemistry Macro-Molecules Test Online
ECAT Chemistry Carboxylic Acid Test Online
ECAT Chemistry Aldehydes and Ketones Test Online
ECAT Chemistry Alcohols Phenols And Ethers Test Online
ECAT Chemistry Alkyl Halides Test Online
ECAT Chemistry Aromatic Hydrocarbons Test Online
ECAT Chemistry Aliphatic Hydrocarbons Test Online
ECAT Chemistry Fundamental Principles of Organic Chemistry T...

Maan AliLast Updated: April 19, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

6 Comments

Khudabux mari padidan station says:

June 2, 2022 at 6:31 am

76

Khudabux mari padidan station says:

June 2, 2022 at 6:23 am

56

Asad ali says:

July 30, 2021 at 9:20 am

Please practice today because I’m not sure if

Abdul Raqeeb says:

August 4, 2020 at 10:24 am

Sir there is an issue that when I select my topic for test the 1st question not appears also these is not the appearance of option to go for next question

DANIAL says:

May 31, 2017 at 8:38 pm

Sir check your MCQs nmbr 12.

jahanzaib shahid says:

November 6, 2016 at 1:51 am

really thank u so much

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test Online

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

Chemistry

You Might Also Like

Maan Ali

6 Comments

Leave a Reply Cancel reply

Chemistry Periodic Classification Of Elements & Periodicity MCQS Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Chapter Online Test

ECAT Chemistry Periodic Classification Of Elements & Periodicity Test

Chemistry

You Might Also Like

Maan Ali

Your Related

ECAT Mathematics Conic Section Online Test

UET Lahore, Taxila ECAT Maths Entry Test Online Preparation

ECAT Chemistry Reaction Kinetics Test Online

UET Lahore, Taxila ECAT Computer Science Entry Test Online Preparation

ECAT Physics Fluid Dynamics Online Test

ECAT Mathematics Induction and Binomial Theorem Online Test

6 Comments

Leave a Reply Cancel reply