Home/ECAT/ECAT Chemistry S-Block Elements Test Online

ECAT Chemistry S-Block Elements Test Online

Mustansar KhanLast Updated: April 19, 2025

Chemistry S-Block Elements MCQS Online Test

ECAT Chemistry S-Block Elements Chapter Online Test

Total Questions:	155
Time Allowed:	60 Minutes
Total Marks:	155
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 S-Block Elements Test

Please wait...

Page 1 of 7

Chemistry

1. Graphite is a good conductor of electricity. The reason is that

There are Van der wall’s forces of attraction between the planes of c atoms

It has delocalized mobile electron

Carbon atoms have covalent bonds

Carbon atoms of each plane have sp²

2. The oxides of born and silicon are

Natural

Amphoteric

Basic

Acidic solution

3. Bleaching action of bleaching powder is due to the liberation of

OCl¯

Cl¯

Cl₂

O₂

4. Which one of the following gives white precipitate with aqueous BaCl₂?

None

naHco₃

Na₂co₃

NaNo₃

5. Aluminum reacts with caustic soda to form

Aluminum hydroxide

Sodium tetra aluminate

Aluminum oxide

Sodium meta-aluminate

6. Al is more reactive than Fe but Al is less easily corroded than Fe because

It is a noble metal

Iron undergoes reaction easily with water

Oxygen forms a protective reaction easily with water

Fe form mono and divalent ions

7. Causticisation process is used for the preparation of

Baryata solution

Slaked lime

Caustic potash

Caustic soda

8. The aqueous solution of potash alum is

None of these

Acidic

Basic

Neutral

9. Keeping in view the comparison of alkali metals with alkaline earth metals, the alkali metals have

Greater hardness

High melting point

Lower ionization energy

Smaller ionic radii

10. The word alkali means

Base salt

Ashes

Spirit

Base

11. Leblanc process is employed in the manufacture of

Baking soda

Potash

Washing soda

Plaster of Paris

12. The reactivity of the alkali metal sodium with water, is made use of

In drying of ammonia solution

In drying of benzene

As a general drying agent

In drying of alcohols

13. Ammonia may be prepared by heating ammonium chloride with

H₂so₄

Aqueous NaoH

NaCl

Water

14. Aluminum can jam radar due to

It is a conductor of electricity

It is not true

It is a good reflector of radiant energy

It is a conductor of heat

15. Main process for the manufacture of Na₃CO₃ is

Down process

Nelson process

Castner process

Solvay process

16. Borax is a white crystalline solid and it is

Soluble only in organic solvents

Insoluble in water

More soluble in hot water

More soluble in cold water

17. Which of the following alkali metal hydroxides is the strongest base?

LiOH

NaOH

KOH

CsOH

18. Solid CO₂ (dry ice) has a structure just like

None of these

Diamond

Sulphur

Graphite

19. A pseudo solid is

Diamond

Glass

Rock salt

CaCO₃

20. Which is the formula of Chili Salt Peter?

KNo₃

K₂SO₄

NaNo₃

Na₂So₄

21. What is true about physical state of borax?

White crystalline sublime solid

White amorphous solid

White crystalline solid

None of these

22. Alkali and alkaline earth metals show increasing trend down the group in

Atomic volume

Electropositivity

Atomic radii

All above

23. Choose the compound which decomposes on heating similar to LiNO₃

Sr(NO₃)₂

Mg(NO₃)₂

All above

Be(NO₃)₂

24. Sodium metal cannot be stored under

Toluene

Benzene

Alcohol

Kerosene oil

25. Which electronic configuration corresponds to an element of group IIIA?

1s2 2s2 2p4

1s2 2s2 2p6 3s2 3p1

1s2 2s2 2p3

1s2 2s2 2p6 3s2 3p6 4s2 3d1

Page 2 of 7

26. Born is soil has been considered micronutrient for

All

Alkalinity of soil

Soil porosity

Proper growth of plants

27. The principle constituent of pyrex glass is

28. Which metal is protected by a layer of its own oxide?

29. The chief are of aluminum is

Al₂O₃

Na₃ALF₆

Al₂O₃. H₂O

Al₂O₃.₂H₂O

30. The chemical composition of white lead is

Pb₃O₄

PbO

Na₂CO₃

Pb(OH)₂.2PbCO₃

31. Metals belonging to the same group in the periodic table are

Magnesium and sodium

Magnesium and potassium

Magnesium and copper

Magnesium and barium

32. What is true about solubility of orthoboric acid?

Highly soluble in water at all temperatures.

Sparingly soluble in cold water at all temperatures

Sparingly soluble in cold water but readily soluble in hot water

Readily soluble in cold water

33. Alkali earth metals have two electrons outermost

s-orbital

f-orbital

d-orbital

p-orbital

34. The common mineral of alkali metal sodium is borax which has formula.

Na₂B₄O₇

Na₂B₄O₇. 10H₂O

Na₂B₄O₇.5H₂O

Na₂B₃O₆. 10H₂O

35. Which of the most basic of the following?

Na₂O

As₂O₃

BaO

Al₂O₃

36. Which of the following compounds has the lowest anion to cation size ratio?

NaF

LiF

Csl

CsF

37. Ordinary window glass is a mixture of

Na₂CiO₃ and CO₂

Na₂SiO₃ and CaSiO₃

Na₂O and SiO₂

Na₂SiO₃ and SiO₂

38. Which is the weakest reducing agent?

39. Among the following oxides, the one which is most basic is

Magnesium oxide

Aluminum oxide

Nitrogen pent oxide

Zinc oxide

40. Which halide has highest melting point?

NaBr

NaF

NaCl

Nal

41. In the manufacture of cement which of the following is used?

Lime stone and gypsum

Lime stone and clay

Clay and silica

Lime stone and silica

42. With the increase in atomic weights, melting points of the alkali metals

Increase

Remain constant

Decrease

Do not show definite trend

43. Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When carbon dioxide is bubbled through A, it turns cloudy. What is the chemical formula of A?

CaO

CaCO₃

Ca(OH)₂

Ca(HCO₃)₂

44. Red lead is

Pb₃O₄

Pb₄O₃

PbO₂

PbO

45. Choose the gas among the following which turns line water milky:

CO₂

Br₂

NO₂

46. One of the outstanding features of boron is its ability to form

Ionic compounds

Molecular crystals

Molecular addition compounds

Semiconductors

47. Anodizing of Al is said when

Aluminum prepared electrolytically

Aluminum allay containing 95% Al

Aluminum coated electrically with aluminum oxide

Aluminum obtained at anode

48. H₃BO₃ is a

Tribasic acid

None of these

Dibasic acid

Monobasic acid

49. Which of the following is most abundant in the earth’s crust?

50. The elements which belong to group IIIA are called

F – block

D – block

S – block

P – block

Page 3 of 7

51. Point out one of the following which shows moderate electrical conductivity:

Carbrandum

Silica

Diamond

Graphite

52. Which element is present in excess in skeletal material?

53. Which of the following is a component of ruby?

Al₂O₃

MgCO₃

Al(OH)₃

CaCO₃

54. One of the following does not form oxide on heating

Na₂ CO₃

Li2 CO₃

KNo₃

Caco₃

55. Alum is not used

In tanning of leather

In purification of water

As a mordant is dyeing

As an insecticide

56. Special features of borate glass is that it is

Low melting

Heat resistant

Green in colour

Used to prepare chemical garden

57. The process of aluminum extraction is called

Hall process

Haber process

Contact process

Termite process

58. Amongst the metals Be, Mg, Ca and Sr of group 2 of the periodic table, the least ionic chloride would be formed by

59. The alkali metal that reacts with nitrogen directly to form nitride is

60. Which of the following is different from the other three oxides?

SnO

Cr₂O₃

ZnO

MgO

61. Which one does not belong to alkaline earth metal?

62. Setting of cement is an

Neither exothermic nor endothermic

None

Exothermic reaction

Endothermic reaction

63. Which is formula of orthoboric acid?

H₃BO₃

HBO₂

H₆B₄O₉

H₂B₄O₇

64. Which one is not an element of III A group?

Aluminum

Polonium

Thallium

Gallainm

65. Which of the following properties is not true for an alkali metal?

Low electro negativity

Low ionization energy

Low density

Low atomic volume

66. Which one of the following substances conducts electricity by the movement of ions?

Mercury

Copper

Molten NaCl

Graphite

67. Boric acid cannot be used

For enamels and glazes

In soda bottles

For washing of eyes

An antiseptic medicine

68. The element having least value of heat of hydration is

69. Sodium conducts electricity because

It has only one electron in the outermost orbit

It is a soft alkali metal

It has mobile electrons

It gives hydrogen with water

70. Which of the following sulphates is not soluble in water?

Zinc sulphate

Potassium sulphate

Sodium sulphate

Barium sulphate

71. The elements which are very abundant I earth are

B and a

Ca and Mg

All

Si and Al

72. Which is the chemical formula of zircon?

H₂Mg₃(SiO₃)₄

Al₂F₂SiO₄

Na₃AlF₆

ZrSiO₄

73. The solubility of aluminum hydroxide in sodium hydroxide solution is due to formation of

Sodium aluminum hydride

Sodium aluminum hydroxide

Sodium meta aluminate

Aluminum peroxide

74. The formula of calcium cyanamide is

CaC₂N

CaCHNH₂

CaNCN

Ca(CN)₂

75. Silicon is an important constituent of

Amalgams

Haemoglbin

Chlorophyll

Rocks

Page 4 of 7

76. Which element is used in thermite process due to its reactivity?

77. Sodium reacts with water more vigorously than lithium because

It is a metal

It has higher atomic weight

It is more electronegative

It is more electropositive

78. In diaphragm cell, hydrogen is discharged by

H₂S

Water

HCl

NaCl

79. Cesium oxide will be

Weakly basic

Acidic

Very strongly basic

Amphoteric

80. Potassium is kept in

Kerosene

Water

Alcohol

Ammonia

81. Bleaching powder is a compound having a formula

CaOCl₃

CaCO₃

CaOCl₂

CaClO

82. Alkali metal hydroxides are stable to heat except

NaOH

LiOH

KOH

RbOH

83. Galena is an ore of

Gallium

Tin

Lead

Germanium

84. Choose the correct statement

Diamond is the hardest and coke is the softest

Graphite is the hardest which lamp black is the softest

Coal is the hardest and coke is the softest

Diamond is the hardest and graphite is the softest

85. The wire in the flash bulbs is made up of

86. The chloride of an element A gives a neutral solution in water. In the periodic table, the element A belongs to

First transition series

Fifth group

Third group

First group

87. NaNO₃ decomposes on heating at high temperature to give

N₂

O₂

NO₂

Na₂O

88. Which one is formula of borax?

NaOH. B₂O₃

Na₂B₄O₇. 10H₂O

Ca₂B₆O₁₁. 5H₂O

Na₂B₄O₇. 4G₂O

89. The halide which is not hydrolyzed is

CCl₄

PbCl₄

SiCl₄

SiF₄

90. Which of the following is monovalent?

Metalloids

Alkaline earth metals

Metals

Alkali metals

91. What is true about reactivity of aluminum?

It reacts with oxygen of air at high temperature (2000c)

None is correct

It reacts readily with oxygen of the air at room temperature

Its powder form reacts with O₂ and N₂ of air at 800C

92. Which one of the following sulphate is not soluble in water?

Barium sulphate

Sodium sulphate

Zinc sulphate

Potassium sulphate

93. The metal which is used in thermite process because of its activity is

Aluminum

Copper

Iron

Zinc

94. Portland cement is manufactured by using

Limestone, gypsum and sand

Limestone, clay and sand

Limestone, gypsum and alumina

Limestone, clay and gypsum

95. A combustible gas is liberated when caustic soda solution is heated with

NH₄Cl

I₂

96. The substance used as a smoke screen in warfare is

PCl₅

PH₃

SiCl₄

Acetylene

97. Which is the chemical formula of mica?

NaKSiO₄. 10H₂O

K2HAL(SiO₄)₃

KH₂Al₃(SiO₄)₃

NaAlSiO₄. 3H₂O

98. In which of the following elements + 1 oxidation state is more stable than +3

99. Aluminum oxide is

Basic oxide

It does not exists

Acidic oxide

Amphoteric oxide

100. AlCl₃ exist as dimmer because

Al has greater ionization potential

High charge in nucleus

Al has larger radius

Incomplete p-subshell

Page 5 of 7

101. Which is most abundant alkaline metal in earth crust?

102. Down’s cell is used to prepare

Sodium bicarbonate

Sodium carbonate

Sodium hydroxide

Sodium metal

103. White lead is

Basic lead carbonate

Basic lead hydroxide

Acidic lead carbonate

Basic lead acetate

104. Silicon is found in nature in the form of

Only silicates

Sulphides

Oxides

Silica or siticates

105. Chile Salt peter is

Na₂SO₄

Na₂S₂O₃

NaNO₃

KNO₃

106. The elements having highest melting point is

107. The formula of Nitre is

NaNO₂

KNO₃

Na₂CO₃

NaCl

108. Which one of the following has the lowest boiling point?

109. Metallic luster exhibited by Na can be explained by

Existence of body centered cubic lattice

Diffusion of sodium ions

Oscillation of loose electrons

Excitation of free protons

110. Chile saltpeter has the chemical formula

Na₂B₄O₇

KNO₃

Na₂CO₃. H₂O

NaNO₃

111. CO2 is gas while SiO2 is solid at room temperature.

Silicon has all sigma bonds

CO2 is an independent molecule while SiO2 has network covalent structure

CO2 forms multiple bond while silicon does not form multiple bonds

Carbon is non-metal while silicon is semi-metal

112. Magnesium keeps on burning in

N₂ as well as CO₂

CO₂

N₂

N₂O

113. Plaster of Paris hardens by

Giving out water

Combining with water

Giving off CO₂

Changing into CaCO₃

114. Setting of Plaster of Paris involves

Dehydration

Combination with atmospheric CO₂

Hydration to yield another hydrate

Oxidation with atmospheric oxygen

115. Which of the following is not a use of silicon?

Lubricants

Hydraulic brakes

Antifreeze

Water repellent

116. Which compound will show the highest lattice energy?

RbF

CsF

NaF

117. The element having highest electronegativity among the following is

118. Which of the following statements is not true about potash alum?

On heating it melts in its water of crystallization

Its empirical formula is KAl(SO₄). 12H₂O

Its aqueous sol. Is basic in nature

It is used in dyeing industry

119. Mica and bauxite are ores of

120. Which is the most amphoteric?

Na₂O

Al₂O₃

MgO

CaO

121. Microcosmic salt is

K(NH₄)HPO₃. 2H₂O

Na(NH₄)HPO₄.4H₂O

HPO₄.4H₂O

Na(NH₄). H₂O

122. The order of alkali metals is

Li, Na, Cs, K, Rb, Fr

Na, K, Li, Rb, Fe, Cs

Fr, Li, Rb, K, Na, Cs

Li, Na, K, Rb, Cs, Fr

123. The purification method of bauxite containing iron oxide as impurity is known as

Electrolytic process

Baeyer’s process

Hoop’s process

Serpeck’s process

124. The formula of china clay is

Al₂O₃. SiF₄

Al₂O₃. 2H₂O

Al₂O₃. 2SiO₂. 2H₂O

Al₂O₃

125. Which of the following is a Lewis acid?

AsCl₃

NCl₃

AlCl₃

PCl₃

Page 6 of 7

126. Choose the number of group of periodic table to which alkali metals belong to

IIA

VIII

127. The most abundant element in III A group in earth crust is?

Indium

Aluminum

Polonium

Boron

128. Choose the element which does not belong to group II A of the periodic table

129. Which of the following mineral does not contain Al?

Fluorspar

Mica

Feldspar

Cryolite

130. When excess of SnCl₂ is added to a solution of HgCl₂, a white precipitate turning to grey is obtained. This grey colour is due to the formation of

SnCl₄

Hg₂Cl₂

131. The element having least value of ionization energy among the following elements is

132. Which of the following conceivable structures for CCl₄ will have a zero dipole moment?

Square planar

Square pyramid (carbon at apex)

None of these

Irregular tetrahedron

133. Which of the following is most dense?

134. Aluminorthermy used for on the spot welding of large iron structure is based upon the fact that

Reaction between iron and oxygen is endothermic

As compared to iron, aluminum has greater affinity for oxygen

Refraction between aluminum and oxygen is endothermic

As compared to aluminum, iron has greater affinity for oxygen

135. Plaster of Paris is a hydrate of

ZnSO₄

MgSO₄

BaSO₄

CaSO₄

136. BF₃ acts as acid according to the concept of

Bronsted

Arrhenius

Lewis

None

137. Nitrates of which elements give same products

All have same products

Li, Na, K

Li, Na, Be

Li, Mg, Ca

138. Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family (group 14)?

Their metallic character decreases

Their atomic size decreases

The stability of +2 oxidation state increases

Their ionization energy increases

139. Boric acid (H₃BO₃) reacts with NaOH to give a salt.

Na₂B₄O₇

H₂BO₃

Na₂HBO₃

Na₃BO₃

140. Which of the following imparts violet colouration to the non-luminous flame of Bunsen burner?

BaCl₂

CaCl₂

NaCl

KCl

141. Gypsum is applied to the soil as a source of

Ca and s

Could not apply

142. Which of the following in rain water is responsible for weathering of rocks?

CO₂

O₂

N₂

Noble gases

143. Dolomite has the composition

Na₃AIF₆

KCL.MgCL₂.6H₂O

CaCO₃.MgCO₃

CaCl₂.MgCl₂.6H₂O

144. Chrome yellow has a formula

PbO₂

PbCrO₄

PbO

Pb₃O₄

145. Which of the following is most abundant alkali metal in combined state in nature?

s – or – p

Both d – and f –

f – only

d – only

146. The oxides of beryllium are

Acidic

Amphoteric

Basic

None of these

147. The formula of sodium meta borate is

NaBO₃

Na₂B₄O₇

NaBO₂

Na₃BO₃

148. First ionization potential of alkaline earth metal is greater than alkali metals because

All

They have smaller size

They have greater atomic size

They are more reactive

149. Because of its ability to combine with both oxygen and nitrogen aluminum metal is used

As nitro meter

To produce alloy

As insulator

To remove air bubbles from molten metal

150. Alkaline earth metals have higher densities, melting and boiling points than alkali metals because of

High nuclear charge and ionization

High nuclear charge

High ionization potential

None of these

Page 7 of 7

151. Substance which is found in dried up lakes of Tibet and California is

Colemanite

Calcium carbonate

Tincal

Boric acid

152. The chemical formula of bauxite is

None of these

Al₂O₃

Al₂O₃. 2H₂O

Al₂O₃. SiF₄

153. Washing soda has formula

Na₂CO₃. 10H₂O

Na₂CO₃. 3H₂O

Na₂CO₃.

Na₂CO₃. 7H₂O

154. Which of the following gases burns with a blue flame?

N₂

O₂

CO₂

155. Calcium cyananmide on treatment with steam under pressure gives NH₃ and

Calcium hydroxide

Calcium oxide

Calcium carbonate

Calcium bicarbonate

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

ECAT Introduction to Computers Online Test
ECAT Physics Optical Instruments 1 Test Online
ECAT Computer File Handling in “C” Test Online
ECAT Computer Functions in “C” Test Online
ECAT Computer Loop Constructs Test Online
ECAT Computer Decision Constructs Test Online
ECAT Computer Input Output Test Online
ECAT Computer Elements of “C” Test Online
ECAT Computer Getting Started with “C” Test Online
ECAT Computer Science Microsoft Access-Forms and Reports Tes...

Mustansar KhanLast Updated: April 19, 2025

Facebook Twitter Reddit WhatsApp Share via Email Print

ECAT Chemistry S-Block Elements Test Online

Chemistry S-Block Elements MCQS Online Test

ECAT Chemistry S-Block Elements Chapter Online Test

ECAT Chemistry S-Block Elements Test

Chemistry

You Might Also Like

Mustansar Khan

Leave a Reply Cancel reply

Chemistry S-Block Elements MCQS Online Test

ECAT Chemistry S-Block Elements Chapter Online Test

ECAT Chemistry S-Block Elements Test

Chemistry

You Might Also Like

Mustansar Khan

Your Related

ECAT Chemistry Gases 1 Online Test Preparation

ECAT English Vocabulary 7 Test Online

ECAT Chemistry Fundamental Principles of Organic Chemistry Test Online

NUST Rawalpindi ECAT Chemistry Entry Test Preparation Online

ECAT English Correction Test Online

ECAT Computer Science Table and Query Test Online

Leave a Reply Cancel reply