Group III A and Group IV A Elements MCQs
MCQ's with answers from chapter Group III A and Group IV A Elements chemistry book 2 for FSC pre engineering and pre medical for Board of Intermediate and Secondary education. Also For Entry Test Preparation for UET, NUST, PIEAS, GIKI, AIR, FAST, WAH University, UHS, other engineering Universities and Medical Colleges.
1. Which metal is used in the thermal process because of its activity.
(A) Iron (B) Copper
(C) Aluminum (D) Zinc
2. Aluminum oxides is
(A) Acidic oxide (B) Basic oxide
(C) Amphoteric oxide (D) None of these
3. Chemical composition of colemnite is.
(A) Ca2B6O11. 5H2O (B) CaB4O7. 4H2O
(C) Na2B4O7. 4H2O (D) CaNaB5O9. 8H2O
4. Which element forms an ion with charge 3+.
(A) Beryllium (B) Aluminum
(C) Carbon (D) Silicon
5. Which element among the following belongs to
Group IVA of the periodic Table.
(A) Barium (B) Iodine
(C) Lead (D) Oxygen
6. Boric acid cannot be used.
(A) As antiseptic in medicine
(B) For washing eyes
(C) In soda bottles
(D) For enamels and glazes
7. Which of the following elements is not present
abundantly in earth's crust.
(A) Silicon (B) Aluminum
(C) Sodium (D) C
8. The chief Ore of aluminum is.
(A) Na3AIF6 (B) Al2O3. 2H2O
(C) Al2O3 (D) Al2O3. H2O
9. The Group IIA of the periodic table comprises the elements.
(A) Boron, aluminum, gallium, indium and
thallium.
(B) Boron gallium, thallium.
(C) Aluminum, calcium, strontium.
(D) All of the above
10. Boron is non-metallic because of
(A) Large size and higher nuclear change
(B) Small size and higher nuclear charge
(C) Small size and smaller nuclear charge
(D) None of the above
11. The increase in the atomic size in group is
(A) Regular (B) Irregular
(C) Both (D) None of the above
12. Orthoboric Acid is a mineral of.
(A) Aluminum (B) Silicon
(C) Calicium (D) Boron
13. Aluminum is the third most abundant elements in earth crust after.
(A) Oxygen (B) Silicon
(C) None of the above (D) Both of the Both
14. Bauxite is an ore of.
(A) Aluminum (B) Boron
(C) Carbono (D) Gallium
15. Which of the elements of Group IIA are rare and only obtained as by-products.
(A) Gallium thallium
(B) Thallium indium
(C) Gallium indium
(D) Gallium thallium indium
16. Borax is the sodium salt of tetraboric acid. It is
most important of all among.
(A) Borates (B) Carbonates
(C) Bicarbonates (D) None of the above
17. Borax occurs as natural deposit called tincal in the dried up lakes of.
(A) Tibet (B) California
(C) Tibet & California (D) Virginia
18. Group IV A of the periodic table comprises
elements.
(A) Carbon silicon
(B) Tin, carbon , silicon
(C) Carbon, silicon, tin and lead
(D) None of the above
19. The non-metals in Group IV A are.
(A) Carbon, silicon (B) Tin and Lead
(C) All of the above (D) None of the above
20. The elements of Group IV A are character sized by a set of .
(A) Three valence shell electrons
(B) Four valence shell electrons
(C) Five valence shell electrons
(D) Two valence shell electrons
21. Group IV A elements form.
(A) Super oxide (B) Oxides
(C) Dioxide (D) All of the above
22. The property of catenation among the carbon and silicon .
(A) Increase on moving down the group form
carbon to lead
(B) Decrease on moving down the group from
lead to carbon.
(C) Decreases on moving down the group
from carbon to lead
(D) Stable on moving down the group from
carbon to lead.
23. The oxides of carbon are
(A) CO and CO2
(B) CO, CO2 and C3O2 carbon sub oxide
(C) CO, CO2, C2C3
(D) None of the above
24. China wares are made form a mixture of
(A) Kaolin and bone ash
(B) Kaolin and feldspar
(C) Kaolin feldspar and bone ash
(D) None of the above
25. Various oxides are used as pigments in the
pigments of which element.
(A) Oxides of lead, basic lead carbonate etc.
(B) Various oxides of lead
(C) Various oxides of lead, basic lead
carbonate, lead chromate
(D) Oxides of aluminum
26. Boron occurs in traces and has been found to be important for the growth of.
(A) Plants of many kinds
(B) Plants and animals
(C) Animals
(D) None of the above
27. Semiconductors conduct electricity better than.
(A) Conductors (B) Insulators
(C) Both of the above (D) None of the above
28. Oxygen is the abundant element in earth crust?
(A) Most of all
(B) 2nd in number
(C) Third most abundant
(D) 4th most abundant
29. Substance which is found in dried up lakes of Tibet and California is______
a) Tincal b) Boric Acid
c) Calcium carbonate d) All
30. Boron is a white crystalline solid and it is________
a) More soluble in cold water
b) More soluble in hot water
c) More soluble in water
d) Soluble only in organic solvents
31. One of the outstanding features of boron is ability to form________
a) Molecular addition compounds
b) Molecular crystals
c) Semiconductors
d) All
32. Which of the following does not give Borax bead test?
a) Cu b) Cr
c) Ni d) Al
33. The metal which is used in thermite process
because of its activity is_______
a) Iron b) Copper
c) Aluminium d) Zinc
34. Which of the following shows inert pair effect?
a) Boron b) Carbon
c) Silicon d) Tin
35. Tincal is a mineral of____________
a) Al b) Si
c) B d) C
36. Because of its ability to combine with both oxygen and nitrogen, aluminium metal is
used_________
a) As nitrometer
b) To remove air bubbles from molten metal
c) To produce alloy
d) All
37. Silicon differ from silica by a group of _________
a) CH3 b) –OH
c) OCH3 d) O2
38. Boron in soil has been considered essential
specially for________
a) Soil porosity
b) Proper growth of plants
c) Alkalinity of soil
d) All
39. Special feature of borate glass is that it is ______
a) Heat resistant
b) Low melting
c) Used to prepare chemical garden
d) All
40. In p – block elements, the S – electrons of outer shell of the heavier members are failed to participate in bonding, because they
a) Remain paired b) Remain unpaired
c) Are free d) None of these
41. The tendency of the pair of S – electron to remain inert increase with the increase in
a) Atomic number b) Atomic weight
c) E.N d) I.P
42. Boron does not easily form cations, because it has the tendency to form bond like non-metal
a) Ionic bond b) Metallic bond
c) Hydrogen bond d) Covalent bond
43. Boron is metalloid and semiconductor like
a) Be b) K
c) Si d) Al
44. Which element is unstable in air and is oxidized superficially in air
a) Aluminum b) Thallium
c) Gallium d) Indium
45. Crystalline boron has structure
a) Cubic b) Monoclinic
c) Hexagonal d) Trigonal
46. The hydrides B2H6 and Si2H6 are said to
a) Ionic hydrides b) Complex hydrides
c) Interstitial hydrides d) Covalent hydrides
47. The compound, which is used in borax bead test for cations analysis, is
a) NaOH b) H3BO3
c) Na2B4O7.10H2O d) H2B4O7
48. Orthoboric acid is weak acid because it
a) Accepts OH-1 ion b) Donate OH-1 ion
c) Accept H+1 d) Donate H+1
49. The aqueous solution of which acid is used for washing eyes?
a) H2B4O7 b) HCl
c) H3BO3 d) HBO2
50. The process in which Bauxite is purified by dissolving it in 45% aqueous NaOH at 150oC to separate insoluble iron oxide as red mud is called
a) Hall’s process b) Baeyer’s process
c) Arrhenius process d) Grignard process
51. Bauxite is an oxide mineral of
a) Cu b) Ag
c) Al d) Zn
52. AlCl3 and GaCl3 are covalent when anhydrous because
a) They belong to group III A
b) Their ions have small size and high charge
c) They have high I.P
d) None of these
53. In the electrolysis of alumina is mixed with Cryolite (Na3AlF6) and fluorspar (CaF2) in the ratio of 20 : 60 : 20. the function of the Cryolite and fluorspar is
a) To decrease the fusion temperature of alumina and to make good conductor of electricity
b) To dissolve alumina
c) To dissolve sodium
d) To increase the ionization of alumina
54. Termite is a mixture of
a) Iron oxide and aluminum
b) Iron oxide and copper
c) Copper oxide and aluminum
d) None of these
55. In aluminum termite process, aluminum acts as a
a) Reducing agent b) Oxidizing agent
c) A flux d) None of these
56. Which aluminium alloy is extremely light?
a) Duralumin b) Alnico
c) Magnalium d) Aluminium bronze
57. Cupric oxide on heating with B2O3 yields blue colored beads in the oxidizing flame because
a) Cupric borates are white in color
b) Cupric borates are black in color
c) Cupric borates are green in color
d) Cupric borates are blue in color
58. In mordenting aluminium ions (Al+3) are precipitated on the cloth as
a) Al2O3 b) AlN
c) Al(OH)3 d) AlCl3
59. Platinum metal can be dissolved in
a) Hot con HCl
b) Hot con H2SO4
c) Hot con HNO3
d) A mixture of Con. HCl and con HNO3
60. Which of the following can form nitride, which react with water to give ammonia?
a) Boron b) Gallium
c) Indium d) Thallium
61. The weak acid, which cannot be titrated with standard alkies, is
a) HCl b) H2SO4
c) H3BO3 d) All of these
62. Carbon differs from other members of its group due to smaller atomic size, higher electronegativity and the absence of
a) s – electrons b) p – electrons
c) d – electrons d) All of these
63. Aqua regia is a mixture of concentrated HNO3 and concentrated HCl in the ratio of
a) 3 : 1 b) 1 : 3
c) 2 : 3 d) 3 : 2
64. In land storage batteries, the acid used is
a) Con HCl b) Dil HCl
c) Con H2SO4 d) Dil H2SO4
65. The dry ice is a compound of
a) Solid ice with any water
b) Solid SO2
c) Solid CO2
d) Solid C6H6
66. In the contact process for the manufacturing of H2SO4, the catalyst used is
a) Cu b) Ni
c) Pt d) N2O5
67. The depositing layer in tin plating is
a) Cu b) Sn
c) Al d) Ni
68. Ortho boric acid on heating at 100oC yields
a) Meta boric acid
b) Pyroboric acid
c) Tetra boric acid
d) Boric anhydride acid (B2O3)
69. Which of the following is used in photographic film?
a) MgBr2 b) NaCl
c) AgBr d) Na2S2O3
70. Aluminum does not react with HNO3 at any concentration and therefore HNO3 is transported in aluminum containers, this is due to formation of protective layer of
a) Cupric oxide b) Ferric oxide
c) Aluminum oxide d) Aluminum nitride
71. Action of aqua regia on noble metals is due to
a) HNO3 b) HCl
c) H2SO4 d) Chlorine
72. Phosgene is a poisonous gas, its chemical name is
a) Carbon dioxide b) Phosphonyl chloride
c) Carbon monoxide d) Carbonyl chloride
73. The maximum inert pair effect is shown by
a) B b) Al
c) Ga d) Tl
74. Quartz is the polymeric form of
a) (SiO2)n b) (CO2)n
c) (CH2 – CH2)n d) None of these
75. If a metal is protected by an oxide layer from further attack, the metal is said to be
a) Reactive b) Active
c) Passive d) Attractive
76. Carbon reacts with metals to form
a) Hydrides b) Oxides
c) Hydroxides d) Carbide
77. The control addition of III A and IV A members in Silicon and Germanium is known as
a) Inert pair effect b) Doping
c) Litharge d) Red lead
78. P – type of semi conductor are formed by mixing Silicon or Germanium with members of
a) III A b) IV A
c) V A d) VI A
79. Litharge is chemically
a) PbO b) PbO2
c) Pb3O4 d) Pb(CH3COO)
80. The Octet rule is not followed by
a) Boron on BCl3 b) Oxygen in H2O
c) Nitrogen in NH3 d) Phosphorus in PH3
81. Which of the following elements show
oxidation state of + 3 only?
a) B b) Ga
c) In d) Ti
82. ______ of the following is not metallic in
nature.
a) Boron b) Aluminum
c) Indium d) Thallium
83. The oxides of Boron are ______ in nature.
a) Acidic b) Basic
c) Neutral d) None of these
84. Orthoboric acid on heating to about 100oC
looses a water molecule to form ______
a) Metaboric acid
b) Pyroboric acid
c) Metaboric and pyroboric acid
d) None of these
85. The function of Fluorspar in the electrolytic
reduction of alumina dissolved in fused cryolite
(NA3 AlF6) is
a) As a catalyst
b) To lower the temperature of the melt and to
make the fused mixture conducting.
c) To decrease the rate of oxidation of carbon
at the anode.
d) None of the above
86. Which of the following statements is correct?
a) H3PO3 is dibasic and reducing
b) H3PO3 is tribasic and reducing
c) H3PO3 is tribasic and non – reducing
d) H3PO3 is dibasic and non – reducing
87. Boric acid is
a) Weak monobasic Lewis acid
b) Only weak monobasic Arhenius acid
c) Only weak monobasic Bronsted acid
d) Only weak tribasic Arrhenius acid
88. The reduction of metal oxides is sometimes
accomplished by using aluminum in the
______
a) Goldschmidt’s reaction
b) Silberchemdit’s reaction
c) Baeyer’s reaction
d) Zilch’s reaction
89. Hall’s process is based on electrolysis of
_____
a) Alumina b) Gypsum
c) Borax d) None of these
90. _______ is a better conductor of heat.
a) Fe b) Sn
c) Al d) None of these
91. Al2O3 formation involves evolution of a larger
quantity of heat which makes its uses in
_______
a) Deoxidizer b) Confectionary
c) Indoor photography d) Thermite welding
92. In the commercial electrochemical process fro
aluminum extraction, the electrolyte used is
a) Al(OH)3 in NaOH solution
b) An aqueous solution of Al2(SO4)3
c) A molten mixture of Al2O3 and Na3AlF6
d) A molten mixture of AlO(OH) and Al(OH)3
93. Borax is prepared by treating colemanite with
a) NaNO3 b) NaCl
c) NaHCO3 d) Na2CO3
94. Elements, which exist in two or more physical
or molecular forms, are called _______
a) Isotopes b) Allotropes
c) Isobars d) None of these
95. PbO behaves as a/an _______
a) Amphoteric oxide b) Basic oxide
c) Super oxide d) Sub oxide
96. The number and type of bonds between two
carbon atoms in CaC2 are
a) One sigma and one pi bond
b) One sigma and two pi bonds
c) One sigma and one and a half pi bond
d) One sigma bond
97. Aluminum is diagonally related to
a) Li b) Si
c) Be d) B
98. Which of the following halides is least stable
and has doubtful existence?
a) Cl4 b) SnI4
c) GeI4 d) PbI4
99. In which of the following phosphorus has an
oxidation state of + 4?
a) P4O6 b) P4O8
c) P4O9 d) None of these
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