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NEET Chemistry MCQ
Boron Family Mcq Neet Chemistry
Quiz 3
Solution
Q.1.
Action of caustic soda on aluminium hydroxide gives a compound having formula --- {pb. PMT 1998]
50%
a) Al2(OH)4
25%
b) Na2Al(OH)4
12%
c) NaAlO2
12%
d) NaAlO3
Q.2.
Aluminium reacts with dilute HCl and conce. NaOH solution to liberate the gases respectively
29%
a) H2 and O2
14%
b) O2 and H2
43%
c) H2 and H2
14%
d) O2 and O2
Q.3.
'Anodized aluminium' is aluminium
14%
a) Obtained on anode
71%
b) Electrolytically coated with aluminium oxide
0%
c) Is an alloy of aluminium
14%
d) Non of above
Q.4.
The chief impurity present in red bauxite is .. [ DEC2004]
50%
a) K2SO4
50%
b) FeO3
0%
c) SiO3
0%
d) NaF
Q.5.
Aluminium (III) chloride forms a dimer because? [ CBSE PMT 1995]
57%
a) Higher coordination number can be archived by aluminium
29%
b) Aluminium has high ionization energy
0%
c) Alumium belong to 3rd group
14%
d) It cannot form a trimer
Q.6.
Aluminium chloride is a /an .. [ KCET 2000]
33%
a) Bronsted -Lowry acid
0%
b) Arrhenius acid
67%
c) Lewis acid
0%
d) Lewis base
Q.7.
Alum helps in purifying water by [ AIEEE 2002]
67%
a) Forming Si complex with clay particles
0%
b) Sulphate part which combines with the dirt and remove it
33%
c) Aluminium which coagulates the mud particles
0%
d) Making mud water soluble
Q.8.
On addition of mineral acid to an aqueous solution of borax, the following compound is formed.. [ Roorkee Screening test 1992]
17%
a) Boron hydride
67%
b) Orthoboric acid
17%
c) Meta boric acid
0%
d) Pyroboric acid
Q.9.
Corundum is .. [CPMT 1998]
17%
a) Al2(SO4)3
17%
b) Al2 O3 . H2O
67%
c) Al2 O3 . 2H2O
0%
d) Al2 O3
Q.10.
In the case of small cuts, bleeding is stopped by applying potash alum. Here alum acts as .. [ KCET 2001]
33%
a) Germicide
33%
b) Disinfectant
0%
c) Fungicide
33%
d) Coagulating agent
Q.11.
In alluminate coordination number of Al is
17%
d) 1
17%
a) 4
17%
b) 6
50%
c) 3
Q.12.
Which is the strongest Lewis acid [ DEC 2006]
17%
a) BF3
33%
b) BCl3
0%
c) BBr3
50%
d) BI3
Q.13.
Which of the following properties of aluminium makes it useful for food packing [ AMU 1997]
50%
a) Good thermal conductivity
33%
b) Good electrical conductivity
0%
c) Low density
17%
d) Non-toxicity
Q.14.
Electrolytic reduction of alumina to aluminium by Hall - Heroult process is carried ... [ iit SCREENING TEST2000]
17%
a) In the presence of NaCl
17%
b) In the presence of fluorite
17%
c) In the presence of cryolite which forms a melt with lower melting temperature
50%
d) In the presence of cryolit which forms a melt with higher melting temperature
Q.15.
Which one is a non-metal in group 13(IIIA) .. [ AFMC 2003]
33%
a) B
50%
b) Al
17%
c) Ga
0%
d) In
Q.16.
H3BO3 is .. [ IIT 2003]
50%
a) Monobasic and weak Lewis acid
50%
b) Monobasic and weak Bronsted acid
0%
c) Monobasic and strong Lewis acid
0%
d) Tribasic and weak Bronsted acid
Q.17.
Which is not a mineral of aluminium? { KCET 1998]
50%
a) Anhydrite
25%
b) Bauxite
25%
c) Corundum
0%
d) Diaspore
Q.18.
Which of the following is known as pseudo alum? [ Manipal PMT 2001]
0%
a) KMn(SO4)2 . 12H2O
25%
b) KCr(SO4)2 . 12H2O
25%
c) NH4Fe(SO4)2 . 12H2
50%
d) FeSO4 Al2(SO3)3 . 24H2O
Q.19.
The dissolution of Al(OH)3 in solution of NaOH results in the fomation of ..
25%
a) [Al(H2O)4(OH)2]+
25%
b) [Al(H2O)4(OH)2]-
25%
c) [Al(H2O)4(OH)4]+
25%
d) [Al(H2O)4(OH)4]-
Q.20.
Borax is prepared by treating colemanite with [ DEC 2007]
0%
a) NaNO3
0%
b) NaCl
75%
c) Na2CO3
25%
d) NaHCO3
Q.21.
Hydrogen gas is liberated by the action of aluminium with concentrated solution of ... [ IIT 1987]
0%
a) H2SO4
25%
b) HCl
50%
c) HF
25%
d) HNO3
Q.22.
Which of the following statements about anhydrous aluminum chloride is correct? [ IIT 1981]
25%
a) It exist as AlCl3 molecule
25%
b) It is not easily hydrolyzed
50%
c) It sublimes at 100°C under vacuum
0%
d) It is a strong Lewis base
Q.23.
Which of the following is not protonic acid
0%
a) SO(OH)2
0%
b) PO(OH)
50%
c) Al(OH)3
50%
d) B(OH)3
Q.24.
AlCl3 fumes in moist air because
0%
a) It sublimate
75%
b) It gives out HCl gas
0%
c) It is highly hygroscopic
25%
d) It is ionic
Q.25.
How can the following reaction be made to proceed in forward direction? [ IIT 2006] B(OH)3 + NaOH ↔ NaBO2 + Na[B(OH)4] + H2O
0%
a) Addition of borax
75%
b) addition of cis-1-2-diol
0%
c) Na2HPO4
25%
d) addition of trans -1-2-diol
Q.26.
Solubility of hydrous AlCl3 and unhydrous AlCl3 in diethyl ether be S1 and S2 then
0%
a) S1 > S2
25%
b) S 1 < S2
50%
c) S 1 = S2
25%
d) both are insoluble in diethyl ether
Q.27.
The pair of amphoteric hydroxide is
0%
a) Al(OH)3 and LiOH
50%
b) Al(OH)3 and Be(OH)2
0%
c) Be(OH)2 and Zn(OH)2
50%
d) Mg(OH)2 and Zn(OH)2
Q.28.
In which of the following elements +1 oxidation stable is more stable than +3
0%
a) B
50%
b) Al
0%
c) In
50%
d) Ti
Q.29.
Which of the following methods are used for purification of bauxite containing iron oxide as impurity
0%
a) Serpeck's method
0%
b) Electrolytic refining
75%
c) Baeyer's process
25%
d) Hoope's process
Q.30.
Which of the following wrong regarding the structure of diborane
20%
a) Four terminal hydrogen atoms and two bridged hydrogen atoms
20%
b) The terminal hydrogen atoms and boron atoms lie in a plane
0%
c) Four two centre bonds two three centre bonds
60%
d) B is sp2 hybridized
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