Which of the following is not used as pigment in paints
24%
a) Lead dioxide
19%
b) White lead
25%
c) Lead chromate
32%
d) Pb3O4
Q.3.
Which of the following shows bonds in Silicones .. [ AIIMS 1994]
26%
a) Si - Si - Si - Si
26%
b) Si -C - Si - O - Si
12%
c) Si - C - Si- C - Si
37%
d) - Si - O - Si - O - Si
Q.4.
Glass is a .... [ CBSE PMT 1991]
7%
a) Liquid
15%
b) Solid
43%
c) Supercooled liquid
36%
d) Transparent organic polymer
Q.5.
Which of the following is semiconductor .. [ CPMT 1985]
16%
a) C
28%
b) Pb
46%
c) Ge
10%
d) Sn
Q.6.
Which one of these is acidic? [ Pb. CET 1991]
33%
a) Al2O3
26%
b) SnO2
15%
c) PbO2
25%
d) SiO2
Q.7.
Identify the correct statements from the following : (a) CO2(g) is used as refrigerant for ice-cream and frozen food. (b) The structure of C60 contains twelve six carbon rings and twenty five carbon rings. (c) ZSM-5, a type of zeolite, is used to convert alcohols into gasoline. (d) CO is colorless and odourless gas. [ NEET 2020]
12%
a) (b) and (c) only
43%
b) (c) and (d) only
24%
c) (a), (b) and (c) only
21%
d) (a) and (c) only
Q.8.
Which of the following is incorrect statement? [ NEET 2019]
25%
a) PbF4 is covalent in nature
18%
b) SiCl4 is easily hydrolysed
29%
c) GeX4 (X = F, Cl, Br, I) is more stable than GeX2
29%
d) SnF4 is ionic in nature
Q.9.
Glass reacts with HF to produce .. [ EAMCET 1994]
19%
a) Na3AlF6
30%
b) H2SiF6
32%
c) H2SiO3
19%
d) SiF4
Q.10.
The structure and hybridization of Si(CH3)4 is .. [ CBSE PMT 1996]
10%
a) Bent, sp
14%
b) trigonal, sp2
33%
c) Octahedral, d2sp3
43%
d) tetrahedral, sp3
Q.11.
The ability of a substance to assume two or more crystalline structures is called ... [ CBSE PMT 1990]
20%
a) Isomerism
42%
b) Polymorphism
18%
c) Isomorphism
20%
d) Amorphism
Q.12.
The halide which is not hydrolyzed is ... [ AFMC 1991]
14%
a) SiCl4
32%
b) SiF4
38%
c) CCl4
16%
d) PbCl4
Q.13.
PbCl4 exists but PbBr4 and PbI do not, because of ... [BHU 1993]
30%
a) Inability of bromine and iodine to oxidize Pb+2 to Pb+4
30%
b) Be- and I- ions are bigger in size
30%
c) More electropositive nature of bromine and iodine
9%
d) Chlorine is gas
Q.14.
Pyrex glass is a mixture of ... [ CPMT 1988]
44%
a) Sodium borosilicate and aluminum borosilicate
16%
b) Sodium silicate and calcium silicate
19%
c) Sodium silicate and lead silicate
22%
d) Sodium silicate and aluminum borosilicate
Q.15.
the chemical composition of white lead is ... [ Pb CET sample paper 1991]
15%
a) Na2CO3
30%
b) Pb3O4
37%
c) Pb(OH)2 . 2PbCO3
19%
d) PbO
Q.16.
Red lead is ? { Bihar CEE 1995] Hello
14%
a) PbO
48%
b) Pb3O4
21%
c) PbO2
17%
d) Pb4O3
Q.17.
White lead is [CPMT 1993]
21%
a) Basic lead nitrate
41%
b) Acidic lead carbonate
21%
c) Basic lead carbonate
17%
d) basic lead hydroxide
Q.18.
Which of the following melts in boiling water.. [ MLNR 1984]
24%
a) Gun metal
24%
b) Wood metal
28%
c) Monel metal
24%
d) Bell metal
Q.19.
The substance used as a smoke screen in warfare is ... [ CBSE PMT 1989]
26%
a) SiCl4
22%
b) PH3
15%
c) PCl5
37%
d) Acetylene
Q.20.
Composition of glass is {CPMT 1993]
16%
a) Silica, Lime, NaCl
60%
b) Silica, lime, Na2CO3
4%
c) Silica, NaCl
20%
d) Lime, Na2CO3
Q.21.
Which of the following statements is correct with respect to the property of elements with increase in atomic number in the carbon family ( group14)? [ BHU 1994]
9%
a) Their metallic character decreases
59%
b) The stability of +2 oxidation state increases
23%
c) Their ionization energy increases
9%
d) their atomic size decreases
Q.22.
optical glass contains a high percentage of ... [ KCET 1997]
9%
a) MgO
52%
b) Al2O3
13%
c) B2O3
26%
d) PbO
Q.23.
An alloy which does not contain copper is [ DPMT 1984]
27%
a) Solder
23%
b) Bronze
14%
c) Brass
36%
d) Bell metal
Q.24.
The composition of the common glass is [ HAriyana CEET 1991]
14%
a) Na2O. CaO.6SiO2
38%
b) Na2O.Al2O3.2SiO2
24%
c) CaO.Al2O3.SiO2
24%
d) Na2O. CaO.Al2O3.6SiO2
Q.25.
The material used in solar cells contains... [ IIT 1993]
14%
a) Cs
45%
b) Si
23%
c) Sn
18%
d) Ti
Q.26.
Method used for obtaining highly pure silicon used as semiconductor material is [ CBSE PMT 1994]
4%
a) Oxidation
43%
b) Electrochemical reduction
30%
c) Crystallization
22%
d) Zone refining
Q.27.
galina is an ore of ... [ Pb. CET 1989]
27%
a) Gallium
35%
b) Lead
8%
c) Tin
31%
d) Germanium
Q.28.
Lithage is not commonly used in ... [Pb CET 1989]
9%
a) The manufacture of special glasses
18%
b) Glazing pottery
27%
c) Preparing paints
45%
d) Lead storage batteries
Q.29.
Which variety of glass is used for manufacture of optical glasses
15%
a) Sodium glasses
27%
b) Flint glass
19%
c) Ground glass
38%
d) Quartz glass
Q.30.
Gun metal is an alloy of .. [ EAMCET 1995]
20%
a) Mg, Sn, Zn
20%
b) Cu, Ni, An
48%
c) Cu, Sn, Zn, Pb
12%
d) Cu, Sb, Zn, Pb
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