s block elements mcqs

CHAPTER # 2

S-Block Elements

1. The oxides of beryllium are.

(A) Acidic (B) Basic

2. Which ion will have the maximum value of

heat of hydration?

(A) Na+ (B) Cs+

3. Which one of the following is not an alkali

metal?

(A) Sodium sulphate B) Potassium sulphate

4. The element cesium bears resemblance with.

(A) Ca (B) Cr

5. Chile saltpeter had the chemical formula

(A) NaNO3 (B) KNO3

6. The ore CaSO42H2O has the general name.

(A) Gypsum (B) Dolomite

7. Down's cell is used to prepare.

(A) Sodium carbonate

(B) Sodium bicarbonate

(D) Sodium hydroxide

8. Which element is deposited at the cathode

during the electrolysis of brine in Nelson's cell?

(A) H2 (B) Na

9. Ionic radius of potassium is.

(A) 60 pm (B) 133 pm

10. Among alkaline Earth Metals, the highest heat

of hydration is of.

(A) Be (B) Sr

11. The chemical formula of sylvite is.

(A) Na2CO3. H2O (B) KCI

12. The chemical formula of Alumite (Alum stone)

is.

(A) KCI. MgCI2. 6H2O

(B) KCI

(D) K2SO4 Al(SO4)3. 2Al(OH)3

13. Among alkali metals the lowest atomic number

is of.

(A) Rb (B) K

14. Due to the high reactivity nature of the alkali

metals, they are found in.

(A) Free in nature

(B) Bounded with other elements

(D) All of the above

15. Magnesium is an essential constituent of.

(A) Storaata (B) Plants

16. Which of the alkali earth metal has radioactive

nature.

(A) Be (B) Rb

17. Calcium Phosphate Ca3 (PO4) and calcium

fluoride CaF2 are essential part of living

organisms.

(A) Bones, egg shells (B) teeth

18. Dolomite is a compound of which elements.

(A) Be (B) Mg

19. The melting point and boiling point of which

alkaline earth metal is high.

(A) Sr (B) Mg

20. The super oxides are formed by the elements.

(A) K, Rb, Cs (B) K, Na, Cs,

21. Potassium, rubidium and caeslium are so

highly reactive that they react with ice even at .

(A) -100OC (B) -200OC

22. Among the alkaline earth metal which has

least reactivity even upto 800oC

(A) Ba (B) Cs

23. Plaster of paris is formed after heating upto

100OC

(A) Mg(NO3)2 (B) CaSO4, 2H2O(gypsum)

24. The root system of several plants have been

greatly enlarged by the application of.

A) Sulphur B) Gypsum

C) Both of the above D) None of the above

25. When deficiency of calcium exists various

substances are accumulated in plants in

harmful concentration which are.

(A) Lime

(B) Aluminium

(D) None of the above

26. Which alkali metal behave different by from

others?

(A) Mg (B) Na

27. Spodumene, petalite, halite, natron, alinite are

the common minerals of.

A) Alkali metals B) Alkaline earth metals

C) Both of the above D) Li

28. Sodium is prepared by the electrolysis of.

(A) Simple NaCI in Down,s cell

(B) Molten NaCI in Down,s cell

(D) None of the above

29. Lime is used in.

(A) Glass industry

(B) Glass and paper industries

(D) None of the above

30. The elements which are very abundant in

earth crust are__________

a) Si & Aℓ b) Ca & Mg

c) B & Aℓ d) All

31. The oxides of Be are ___________

a) Acidic b) Basic

c) Amphoteric d) None

32. Carbonates of lithium are not stable like that of

sodium due to _____

a) Low electronegativity

b) Low electropositivity

c) Low charge density

d) Not know yet

33. Which one of the following is not an alkali

metal?

a) Francium b) Caesium

c) Rubidium d) Radium

34. Which of the following sulphates is not soluble

in water?

a) Sodium sulphate b) Potassium sulphate

c) Zinc sulphate d) Barium sulphate

35. The ore CaSO4.2H2O has the general

name____

a) Gypsum b) Dolomite

c) Sodium metal d) Sodium hydroxide

36. Crystals of Na2CO3. 10H2O when exposed to

air, _______

a) Lose water and remain solid

b) Gain water and remain solid

c) Gain water and become liquid

d) Remains unchanged.

37. The deliquescence is a process in which a

solid________

a) Absorbs moisture and remains solid

b) Absorbs moisture and turns to liquid form

c) Loses water of crystallization

d) Increases the number of water of

crystallization

38. In diaphragm cell, level of brine in anode

compartment is kept slightly higher which

prevents_________

a) Hydroxide ions to reach anode

b) Chlorine gas to mix

c) Anode to decay

d) All

39. Alkali metals form bonds

a) Ionic b) Covalent

c) Metallic d) Co-ordinate covalent

40. The alkali metals, which have radioactive

isotopes

a) Li b) Na

c) K d) K and Rb

41. Halite is the mineral of

a) Sodium b) Potassium

c) Lithium d) Cesium

42. Na2SO3.10H2O is the mineral of sodium and is

called

a) Spodumene b) Halite

c) Natron d) Sylvite

43. Which one of the following is dolomite?

a) MgCO3 b) MgCO3.CaCO3

c) CaCO3 d) BaSO4

44. The high electrical conductivity of alkali metals

is due to the

a) Free motion of valence electrons

b) High I.P

c) Lesser atomic radii

d) None of these

45. Sodium imparts color to Bunsen flame

a) Green b) Violet

c) Blue d) Yellow

46. All alkaline earth metals are white except

a) Mg b) Ca

c) Be d) Sr

47. Metals, which are higher that water, are

a) Alkaline earth metals

b) Coinage metals

c) Alkali metals

d) All of these

48. Except lithium, the hydroxides of all alkali

metals are

a) Strongly acidic b) Strongly basic

c) Weakly basic d) All of these

49. The carbonates and phosphates of which

elements are insoluble in water

a) Na and K b) Na and Be

c) Li and Mg d) All of these

50. All alkaline earth metals react with water at

room temperature to release hydrogen and

give basic solutions except

a) Be and Ca b) Be and Mg

c) Ca and Mg d) Mg and Sr

51. Lithium only forms normal oxides when burnt

on air but when sodium burnt in air it forms

a) Normal oxides b) Sub oxides

c) Peroxides d) Super oxides

52. The super oxides of alkali metals are generally

represented by

a) M2O b) M2O2

c) MO2 d) M2O3

53. The nitrates of which group decompose on

heating with the formation of nitrites and

evolution of oxygen

a) IA b) II A

c) III A d) IV A

54. A small amount of calcium chloride or mixture

of KCl and KF is added to NaCl in Down’s cell

a) To make it good conductor

b) To decrease the m.p of NaCl

c) To increase the ionization of NaCl

d) To decrease the ionization of NaCl

55. Liquid sodium in the Down’s cell is collected at

a temperature of

a) 700oC b) 600oC

c) 500oC d) 400oC

56. The product, which is obtained at cathode in

the Down’s cell is

a) Liquid Sodium b) Dry chlorine

c) Water d) Hydrogen

57. Which is manufactured by the electrolysis of

fused sodium chloride?

a) NaOH b) NaHCO3

c) Na d) Na2CO3

58. Which of the following does not conduct

electricity?

a) Boron b) Gallium

c) Indium d) Thallium

59. Which alkali metal is rare and found in a small

amount in all – igneous rocks?

a) Li b) Na

c) K d) Fr

60. The ingredient of baking powder is

a) NaHCO3 b) NaOH

c) Na2CO3 d) NaCl

61. The formula of plaster of Paris is

a) CaSO4 b) CaSO4.H2O

c) CaSO4.2H2O d) 2CaSO4.H2O

62. Which of the following is fluorspar?

a) CaO b) CaCO3

c) CaF2 d) NaOH

63. Potassium is kept in

a) Water b) Alcohol

c) Ammonia d) Kerosene oil

64. Which one has high m.p?

a) NaCl b) NaBr

c) Nal d) NaF

65. Which one of the following is most basic?

a) Al2O3 b) SiO2

c) P2O5 d) MgO

66. Gypsum is

a) CaSO4.2H2O b) CaSO4.H2O

c) CaSO4 d) MgSO4

67. Which one is commonly used as a

laboratory desicator?

a) Na2CO3 b) NaCl

c) CaCl3 d) NaOH

68. The radioactive alkaline earth metal is

a) Be b) Mg

c) Ra d) Ba

69. Which one of the following elements has its

compounds which are diamagnetic and

colourless?

a) Be b) Sr

c) Na d) All of these

70. Which metal is an important component of

transistors?

a) Ag b) Au

c) Ra d) Os

71. Which impurities are present in common salt?

a) Na2SO4 b) CaSO4

c) CaCl2 d) All of these

72. K can displace Na from NaCl due to

a) Greater I.P of K

b) Greater I.P of Na

c) More electropositivity of K

d) More electropositivity of Na

73. The alkali metal, which is artificially prepared

a) Na b) Rb

c) Fr d) Cs

74. The chemical use for the production of CO2 in

the fire extinguishers is

a) NaOH

b) NaCl

c) NaHCO3 and dilute acid

d) NaHCO3 and NaOH

75. LiCl is more soluble in organic solvents than

NaCl because

a) Li+1 has higher heat of hydration than Na+

b) Li+1 has lower heat of hydration than Na+

c) LiCl is more covalent than NaCl

d) Lattice energy of NaCl is less than that of

LiCl

76. Which compound is used for uric acid

treatment in human beings?

a) Na2CO3 b) NaHCO3

c) Li2CO3 d) NaNO3

77. Which element is used in T.V picture tube?

a) Na b) K

c) Ca d) Cs

78. Which one is used in the manufacture of chalk

pencils?

a) Marble b) Gypsum

c) Epsom salt d) Baking soda

79. Plaster of Paris has a structure

a) Cubic b) Monoclinic

c) Hexagonal d) Orthorhombic

80. Potassium super oxide (KO2) is used in

breathing equipments for mountaineers and

space craft because it absorb

a) Oxygen and giving out CO2 at the same

time

b) N2 and giving out CO2 at the same time

c) CO2 and giving out O2 at the same time

d) Pollutants and giving out O2 at the same

time

81. The hydroxide, which is called milk of

magnesium and is used for treatment of acidity

in stomach, is

a) Ca(OH)2 b) Mg(OH)2

c) Sr(OH)2 d) Ba(OH)2

82. Mg+2 is smaller the Na+1 because

a) Mg+2 has fewer electron than Na+1

b) Mg+2 has greater electron than Na+1

c) Mg+2 has greater atomic number than Na+1

d) Mg+2 has low I.P than Na+1

83. Which of them has almost same

electronegativity?

a) Be, B b) B, Al

c) Be, Al d) K, Na

84. A mixture formed by mixing one volume of

slaked lime Ca(OH)2 with three or four volume

of sand and water to form a thick paste is

called

a) Lime water b) Dead water

c) Quick lime d) Milk of lime

85. If the compound has the same crystal

structure and analogous formulae, they are

called

a) Isotopes b) Allotropes

c) Isomers d) Isobars

86. Out of all elements of group IA, the highest

heat of hydration is for _______

a) K b) Rb

c) Cs d) Li

87. The nitride ion in lithium nitride is composed of

a) 7 protons and 7 electrons

b) 10 protons and 7 electrons

c) 10 protons and 10 electrons

d) 10 protons and 5 electrons

88. When NH3 is passed over heated sodium at

300oC, the product formed is

a) NaNH2 b) NaNO2

c) Na(NH3)2 d) Na3N

89. Sodium metal can be stored under

a) Benzene b) Kerosene

c) Alcohol d) Water

90. Chile sulphur is

a) NaNO2 b) KNO2

c) NaNO3 d) KNO3

91. Alkali metals do not exist in

a) Monoatomic b) Diatomic

c) Triatomic d) None of these

92. In general alkali metals act as ________

a) Reducing agents

b) Oxidizing agents

c) Both reducing and oxidizing agents

d) None of these

93. Sodium is not observed in + 2 oxidation state

because of its ______

a) High first ionization potential

b) High second oxidation potential

c) High ionic radius

d) High electronegativity

94. The metallic luster of sodium is explained by

the presence of _______

a) Na+ ions

b) Conduction electrons

c) Free protons

d) A body centered cubic lattice

95. In the alkali metal series, Cesium is the most

reactive metal because _______

a) Its incomplete shell is nearest to nucleus

b) The valence electron has a larger orbit than

the orbit of the valence electron of any of

the other.

c) It exerts considerable beautiful force on the

valence electrons

d) It is a heavier metal.

96. A graphite anode is used in Down’s cell for the

production of sodium because ______

a) It does not react with sodium

b) It does not react with chlorine

c) It is easy to fashion in circular form

d) It floats on the fused sodium chloride

97. Alkaline earth metals form ______ carbides on

heating with carbon.

a) Stable b) Unstable

c) Soluble d) None of these

98. When burnt in air, Lithium forms _______

a) Normal oxide b) Peroxide

c) Super oxide d) None of these

99. Sodium bicarbonate is commonly called

a) Soda ash b) Baking soda

c) Caustic soda d) None of these

100. _______ is a stronger base.

a) NaOH b) KOH

c) LiOH d) HCl

101. Excess of NaOH reacts with zinc to form

a) Zn(OH)2 b) ZnH2ZA

c) Na2ZnO2 d) ZnO

102. Which of the following represents calcium

chlorite?

a) CaClO2 b) Ca(ClO4)2

c) Ca(ClO3)2 d) Ca(ClO2)2

103. Sodium hydroxide solution reacts with

phosphorus to give phosphine, To bring about

we need this reaction

a) White phosphorus and dilute NaOH

b) White phosphorus and concentrated NaOH

c) Red phosphorus and dilute NaOH

d) Red phosphorus and concentrated NaOH

104. Sodium reacts with water more vigorously than

lithium because it

a) Has higher atomic weight

b) Is more electronegative

c) Is more electropositive

d) Is a metal

105. Plaster of Paris hardens by

a) Giving off CO2

b) Changing into CaCO3

c) Uniting with water

d) Giving out water

Search This Blog

BANK OF MCQs

Our Services

s block elements mcqs

Comments

Post a Comment

Popular posts from this blog

Download free 2010-2019 ETEA past papers with key and solution

NUMS past papers 2010-2019 Free PDF download

📒ETEA past papers yearwise 2010-2019 free PDF download

PMC MDCAT practice tests download pdf free

50,000+ MCQS,100+ Lectures, Sunday Tests- 100+ Free pdf Books

Punjab/federal books

😃BOM FREE Sunday tests and notes on iron and copper

Top 20 Books for entry tests (free pdf downoad)

Kmu merit list 2020 pdf.