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NEET
NEET Chemistry MCQ
Boron Family Mcq Neet Chemistry
Quiz 1
Solution
Q.1.
The correct order of atomic radii in group 13 elements is [ NEET 2018]
19%
a) B < Ga < Al < Tl < In
38%
b) B < Al < Ga < In < Tl
14%
c) B < Al < In < Ga < Tl
30%
d) B < Ga < Al < In < Tl
Q.2.
The purification method of bauxite containing iron oxide as impurity is known as .. [ Kerala PMT 1998]
9%
a) Hoop's method
64%
b) Baeyer's process
22%
c) Electrolytic process
5%
d) Electrolytic process
Q.3.
An example of double salt is .. [ CBSE PMT 1989]
18%
a) Bleaching powder
30%
b) K4[Fe(CN)6]
3%
c) Hypo
48%
d) Potash alum
Q.4.
Which is true for an element R present in group 13 of period table
14%
a) It is a gas at room temperature
21%
b) It has oxidation state of +4
55%
c) It form R2O3
9%
d) It forms RX2
Q.5.
Chief ore of aluminium is .. {CPMT 1989]
4%
a) Cryolite
14%
b) Feldspar
6%
c) Koline
76%
d) Bauxite
Q.6.
Which of the following mineral does not contain Al/ [ CPMT 1989]
8%
a) Cryolite
33%
b) Mica
21%
c) Feldspar
38%
d) Fluorspar
Q.7.
Which member of group 13 does not exhibit the group valency in its compounds.. { Pb sample papers 1991]
22%
a) Boron
16%
b) Aluminium
10%
c) Gallium
53%
d) Thallium
Q.8.
Which one of the following is a correct statement? [ MP CEE 1193]
19%
a) Al is more acidic than that of B
16%
b) B is basic while that of Al is amphoteric
49%
c) B is acidic while that of Al is amphoteric
16%
d) A and Al are amphoteric
Q.9.
In the aluminino-thermite process, Al acts as a/an... [ IIT 1983]
14%
a) Flux
56%
b) Oxidising agent
25%
c) Reducing agent
6%
d) Solder
Q.10.
Which of the following reaction ill not give an anhydrous AlCl3 .. [ kerla PMT 1998]
29%
a) By heating AlCl3 . 6H2O
24%
b) By passing dry HCl on heated aluminium powder
21%
c) By passing dry chlorine on heated aluminium powder
26%
d) By passing dry chlorine over heated mixture of coke and alumina
Q.11.
The chemical formula of bauxite is [ Pb CET 1990]
13%
a) Al2O3
77%
b) Al2O3 . nH2O
8%
c) Na3AlF4
3%
d) Al2CL6
Q.12.
An example of alum is .. [ Haryana CEET 1991]
28%
a) Al2(SO4)3 . Na2SO4 . 12H2O
8%
b) FeSO4 . (NH4)2SO4 . 6H2O
61%
c) K2SO4 . Al2(SO4)3 . 24H2O
3%
d) FeSO4 . Al2(SO4)3 . 24H2O
Q.13.
Duraluminium is an alloy of .. [ CPMT 1986]
24%
a) Al and Mg
15%
b) Al, Mg and Ni
52%
c) Al, Mg, Mn and Cu
9%
d) Al and Ni
Q.14.
Thallium shows different oxidation states because .. [ CPMT 1988]
22%
a) It is transition element
54%
b) Of inert pair effect
14%
c) Of its amphoteric character
11%
d) Of its higher reactivity
Q.15.
Inert pair effect plays an important role in case of ... [Pb CET 1991]
3%
a) F
30%
b) Al
6%
c) Si
61%
d) Tl
Q.16.
Aluminium vessels should not be washed with materials containing washing soda since .. { KCET 1993]
3%
a) washing soda is expensive
3%
b) washing soda is easily decomposed
65%
c) Washing soda reacts with Al to form insoluble aluminium Oxide
29%
d) Washing soda reacts with Al to form soluble aluminate
Q.17.
Aluminothermy used for on the spot welding of large iron structure is based upon the fact that .. [ Pb CET 1988]
31%
a) As compared to iron, aluminium has greater affinity for oxygen
35%
b) As compared to aluminium, iron has greater affinity for oxygen
19%
c) Reaction between aluminium and oxygen is endothermic
15%
d) Reaction between iron and oxygen is endothermic
Q.18.
Anhydrous AlCl3 is prepared from .. [ MP PMT 1998]
29%
a) Conc. HCl and aluminium metal
13%
b) Aluminium and Cl2
45%
c) Dry HCl gas and heated aluminium metal
13%
d) Dilute HCl and Aluminium metal
Q.19.
Alum is not used ... [ CPMT 1992]
18%
a) As mordant in dyeing
45%
b) As insecticide
24%
c) In purification of water
12%
d) In tanning of leather
Q.20.
In the electrolysis of aluminium, cryolite is added to ... [ IIT 1986]
14%
a) Lower the melting point of aluminia
7%
b) Increases the electrical conductivity
14%
c) Minimise anodic effect
66%
d) both (a) and (b)
Q.21.
Hydrogen will not reduce .. [ IIT 1985]
13%
a) Heated cupric oxide
10%
b) Heated ferric oxide
23%
c) Heated stanic oxide
53%
d) Heated Aluminium Oxide
Q.22.
Which of the following processes does not involved a catalyst?
34%
a) Haber's process
55%
b) Thermite process
0%
c) Ostwald process
10%
d) Contact process
Q.23.
In which of the following elements +1 oxidation state is more stable than +3 ... [ EAMCET 1991]
14%
a) B
10%
b) Al
14%
c) Ga
62%
d) Tl
Q.24.
In thermite welding process we use [ MP CET 1993]
32%
a) Al powder
8%
b) Fe powder
8%
c) Ca powder
52%
d) Al + Fe mixture
Q.25.
Which metal is protected by a layer of its own oxide? [ DPMT 1983]
62%
a) Al
10%
b) Ag
14%
c) Au
14%
d) Fe
Q.26.
Which of the following statements is not true both for B and Al? [ Pb CET sample paper 1988]
30%
a) They burn in oxygen to give oxide at high temperature
20%
b) Their halides are Lewis acids
30%
c) They combine with nitrogen to form nitrides
20%
d) They react with HCl to form chlorides
Q.27.
Al2O3 formation involves evolution of a large quantity of heat which makes its use in ... [ MPPMT 1990]
17%
a) Deoxidiser
4%
b) Confectionary
17%
c) Indoor photography
61%
d) Thermite welding
Q.28.
Which is used in high temperature thermometry? [ MP PMT 1993]
0%
a) Na
37%
b) Ga
41%
c) Tl
22%
d) Hg
Q.29.
Thermite is a mixture of ... [ IIT 1983]
27%
a) 3 parts of powder Al and 1 part of Fe2O3
27%
b)1 parts of powder Al and 3 part of Fe2O3
27%
c) 1 parts of powder Al and 1 part of Fe2O3
18%
d)2 parts of powder Al and 1 part of Fe2O3
Q.30.
Which one of the following is strongest Lewis acid? [ CPMT 1989]
48%
a) BF3
11%
b) BCl3
15%
c) BBr3
26%
d) BI3
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