hich among CH4, SiH4 , GeH4 and SnH4 is most volatile .. [ JIPMER 2001]
25%
a) CH4
38%
b) SiH4
12%
c) GeH4
25%
d) SnH4
Q.2.
Which of the following does not give silicon
17%
a) SiCl4 + H2
17%
b) Heating SiI4
33%
c) Heating SiO2 at high temperature
33%
d) SiCl4 + CH3MgCl
Q.3.
A pseudo solid is ... [ CPMT 1998]
33%
a) Diamond
0%
b) Glass
67%
c) Rock salt
0%
d) CaCO3
Q.4.
Which of the following sukphate is insoluble in water? [ MP PMT 2000]
17%
a) CuSO4
17%
b) CdSO4
17%
c) PbSO4
50%
d) Bi2(SO4)3
Q.5.
Which of the following reaction occurs at the cathode of the charging of lead storage battery? [ MP PMT 2002]
0%
a) Pb2+ + 2e- → Pb
20%
b) Pb2+ + SO42- → PbSO4
40%
c) Pb → Pb2+ + 2e-
40%
d) PbSO4 + 2H2O → PbO2 +4H+ + SO4- + 2e-
Q.6.
Which of the following is not acidic? [ Harayana CEET 2003]
33%
a) PCl3
0%
b) SbCl3
50%
c) BiCl3
17%
d) CCl4
Q.7.
Quartz is a crystalline variety of ... {DOPMT 1998]
17%
a) Si
50%
b) SiO2
33%
c) Na2SiO3
0%
d) SiC
Q.8.
The variety of glass used in making lens and prisms is .. [ kerala CEE 2001]
0%
a) soda glass
29%
b) borosilicate glass
71%
c) Flint glass
0%
d) Crook's glass
Q.9.
Lead is maximum in ... [ DPMT 2003]
20%
a) Pyrex glass
40%
b) Soda glass
20%
c) Flint glass
20%
d) Jena glass
Q.10.
Which is not true regarding element Si
40%
a) Its maximum covalency is six
20%
b) It gives P type semiconductor when doped with Al
20%
c) Its chloride is inert in water
20%
d) Its oxides form salt with NaOH
Q.11.
An oxide of lead which is used in a lead storage batteries, in safety matches and is a powerful oxidising agent is
20%
a) PbO
20%
b) PbO2
40%
c) Pb3O34
20%
d) 2PbO.PbO2
Q.12.
in laboratory, silicon can be prepared by the reaction of ... [ DPMT 1997]
40%
a) SiO2 with Mg
0%
b) By heating C in electric furnace
60%
c) By heating potassium fluorosilicate with potassium
0%
d) None of these
Q.13.
For making good quality mirror, plates of flint glass are used. these are obtained by floating molten glass over liquid which does not solidify before glass. The metal used can be .. [ AIEEE 2003]
60%
a) Tin
0%
b) Sodium
40%
c) Magnesium
0%
d) Mercury
Q.14.
The metal used for making radiation shield is [ Kerala MEE 2002]
0%
a) Al
60%
b) Pb
0%
c) Fe
40%
d) Si
Q.15.
The element which do not form a monoxide is .. [ Kerala MEE 2001]
20%
a) Lead
40%
b) Tin
40%
c) silicon
0%
d) Carbon
Q.16.
LPG contains .. [ Bihar CEE 2002]
40%
a) Methane
0%
b) Ethane
40%
c) Butane
20%
d) non of these
Q.17.
Which element-element bond has highest bond energy
0%
a) Sn - Sn
0%
b) Ge - Ge
40%
c) SiF4
60%
d) Si - Si
Q.18.
Maximum covalency of silicon is
0%
a) 4
80%
b) 6
20%
c) 3
0%
d) 2
Q.19.
Lead sulphate is soluble in ... {PMP CEE 1999]
40%
a) Conc. HNO3
0%
b) Conc. HCl
0%
c) Solution of ammonium acetate
60%
d) Water
Q.20.
Which of the following lead oxide is 'Sindure'? [ MP CET 2002]
20%
a) PbO
20%
b) PbO2
40%
c) Pb2O3
20%
d) Pb3O4
Q.21.
An alloy of Pb and Sn in equal proportion is called
0%
a) Gun metal
0%
b) Horn silver
20%
c) Constantans
80%
d) Solder
Q.22.
In manufacturing of cement which of the following is used?
0%
a) gypsum and Silica
40%
b) Lime stone and silica
40%
c) Lime stone and clay
20%
d) Lime stone and gypsum
Q.23.
Which of the following statement is correct with respect to the property of elements with increase in atomic number in carbon family
0%
a) Their metallic character decreases
60%
b) The stability of +2 oxidation state increases
0%
c) Their ionization energy increases
40%
d) Their atomic size decreases
Q.24.
Wood charcole is used to decolorise sugar because it .. [ UP CET 2002]
75%
a) Adsorbs coloured material
0%
b) Absorbs decoloured material
0%
c) Reduces coloured material
25%
d) None of these
Q.25.
Graphite is similar to
0%
a) B
0%
b) BC
50%
c) B2H6
50%
d) BN
Q.26.
Glass reacts with HF to produce
25%
a) Na2AlF4
25%
b) H2SiF6
50%
c) NaSiF3
0%
d) SiF6
Q.27.
hich of the following bond has the most polar character?
0%
a) C -O
0%
b) C - Br
50%
c) C- I
50%
d) C - F
Q.28.
Graphite is a soft solid lubricant extremely difficult to melt. THe reason for this anomalous behavior is that graphite .. [ AIEEE 2003]
0%
a) Is non-crystalline substance
25%
b) In allotropic form diamond
0%
c) Has molecules of various molecular masses
75%
d) Has carbon atoms arranged in large plates of hexagonal ring of strongly bounded atoms with weak interplate bonds
Q.29.
A fibrous material which can withstand red hot flames without any damage is
0%
a) Talc
25%
b) Glass wool
50%
c) Asbestos
25%
d) soap stone
Q.30.
In laboratory silicon can be prepared by the reaction of ..
75%
a) SiO2 with Mg
0%
b) By heating SiO2 with Al
0%
c) By heating potassium fluorosilicate
25%
d) None of the above
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