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Carbon Family Mcq Neet Chemistry
Quiz 3
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Q.1
hich among CH4, SiH4 , GeH4 and SnH4 is most volatile .. [ JIPMER 2001]
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a) CH4
0%
b) SiH4
0%
c) GeH4
0%
d) SnH4
Explanation
Volatility decreases down the group Answer: (a)
Q.2
Which of the following does not give silicon
0%
a) SiCl4 + H2
0%
b) Heating SiI4
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c) Heating SiO2 at high temperature
0%
d) SiCl4 + CH3MgCl
Explanation
Answer:(d)
Q.3
A pseudo solid is ... [ CPMT 1998]
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a) Diamond
0%
b) Glass
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c) Rock salt
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d) CaCO3
Explanation
Answer: (b)
Q.4
Which of the following sukphate is insoluble in water? [ MP PMT 2000]
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a) CuSO4
0%
b) CdSO4
0%
c) PbSO4
0%
d) Bi2(SO4)3
Explanation
Answer: (c)
Q.5
Which of the following reaction occurs at the cathode of the charging of lead storage battery? [ MP PMT 2002]
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a) Pb2+ + 2e- → Pb
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b) Pb2+ + SO42- → PbSO4
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c) Pb → Pb2+ + 2e-
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d) PbSO4 + 2H2O → PbO2 +4H+ + SO4- + 2e-
Explanation
Answer: (d)
Q.6
Which of the following is not acidic? [ Harayana CEET 2003]
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a) PCl3
0%
b) SbCl3
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c) BiCl3
0%
d) CCl4
Explanation
CCl4 is not acidic all other are acidic on hydrolysis Answer:(d)
Q.7
Quartz is a crystalline variety of ... {DOPMT 1998]
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a) Si
0%
b) SiO2
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c) Na2SiO3
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d) SiC
Explanation
Answer: (b)
Q.8
The variety of glass used in making lens and prisms is .. [ kerala CEE 2001]
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a) soda glass
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b) borosilicate glass
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c) Flint glass
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d) Crook's glass
Explanation
flint glass is potassium lead silicate glass have maximum refractive index Answer: (c)
Q.9
Lead is maximum in ... [ DPMT 2003]
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a) Pyrex glass
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b) Soda glass
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c) Flint glass
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d) Jena glass
Explanation
Flint glass contain about 24% PbO Answer: (c)
Q.10
Which is not true regarding element Si
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a) Its maximum covalency is six
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b) It gives P type semiconductor when doped with Al
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c) Its chloride is inert in water
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d) Its oxides form salt with NaOH
Explanation
Answer:(d)
Q.11
An oxide of lead which is used in a lead storage batteries, in safety matches and is a powerful oxidising agent is
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a) PbO
0%
b) PbO2
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c) Pb3O34
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d) 2PbO.PbO2
Explanation
Answer: (b)
Q.12
in laboratory, silicon can be prepared by the reaction of ... [ DPMT 1997]
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a) SiO2 with Mg
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b) By heating C in electric furnace
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c) By heating potassium fluorosilicate with potassium
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d) None of these
Explanation
SiO2 + 2Mg → 2MgO + Si Answer: (a)
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]
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a) Tin
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b) Sodium
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c) Magnesium
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d) Mercury
Explanation
Answer: (a)
Q.14
The metal used for making radiation shield is [ Kerala MEE 2002]
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a) Al
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b) Pb
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c) Fe
0%
d) Si
Explanation
Answer:(b)
Q.15
The element which do not form a monoxide is .. [ Kerala MEE 2001]
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a) Lead
0%
b) Tin
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c) silicon
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d) Carbon
Explanation
Answer: (c)
Q.16
LPG contains .. [ Bihar CEE 2002]
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a) Methane
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b) Ethane
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c) Butane
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d) non of these
Explanation
Answer: (c)
Q.17
Which element-element bond has highest bond energy
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a) Sn - Sn
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b) Ge - Ge
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c) SiF4
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d) Si - Si
Explanation
SiF4 reaction is Si(s) + 2F2(g) → SiF4(g) ΔH = -1615kJ It is much higher than rest of the option because of high electro- negativity of F Answer: (c)
Q.18
Maximum covalency of silicon is
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a) 4
0%
b) 6
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c) 3
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d) 2
Explanation
Answer:(b)
Q.19
Lead sulphate is soluble in ... {PMP CEE 1999]
0%
a) Conc. HNO3
0%
b) Conc. HCl
0%
c) Solution of ammonium acetate
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d) Water
Explanation
Lead sulphate on reacting with ammonium acetate solution gives Pb(CH3COO)2 which is soluble Answer: (c)
Q.20
Which of the following lead oxide is 'Sindure'? [ MP CET 2002]
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a) PbO
0%
b) PbO2
0%
c) Pb2O3
0%
d) Pb3O4
Explanation
Answer: (d)
Q.21
An alloy of Pb and Sn in equal proportion is called
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a) Gun metal
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b) Horn silver
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c) Constantans
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d) Solder
Explanation
Answer: (d)
Q.22
In manufacturing of cement which of the following is used?
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a) gypsum and Silica
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b) Lime stone and silica
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c) Lime stone and clay
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d) Lime stone and gypsum
Explanation
Answer:(b)
Q.23
Which of the following statement is correct with respect to the property of elements with increase in atomic number in carbon family
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a) Their metallic character decreases
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b) The stability of +2 oxidation state increases
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c) Their ionization energy increases
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d) Their atomic size decreases
Explanation
Answer: (b)
Q.24
Wood charcole is used to decolorise sugar because it .. [ UP CET 2002]
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a) Adsorbs coloured material
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b) Absorbs decoloured material
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c) Reduces coloured material
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d) None of these
Explanation
Answer: (a)
Q.25
Graphite is similar to
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a) B
0%
b) BC
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c) B2H6
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d) BN
Explanation
BN and graphite have layered structure Answer: (d)
Q.26
Glass reacts with HF to produce
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a) Na2AlF4
0%
b) H2SiF6
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c) NaSiF3
0%
d) SiF6
Explanation
SiO2 + 6HF → H2SiF6 +2H2O Glass can also give reaction SiO2+4HF → SiF4+2H2O Answer:(b)
Q.27
hich of the following bond has the most polar character?
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a) C -O
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b) C - Br
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c) C- I
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d) C - F
Explanation
Due to maximum electro negativity C - F is polar Answer: (d)
Q.28
Graphite is a soft solid lubricant extremely difficult to melt. THe reason for this anomalous behavior is that graphite .. [ AIEEE 2003]
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a) Is non-crystalline substance
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b) In allotropic form diamond
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c) Has molecules of various molecular masses
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d) Has carbon atoms arranged in large plates of hexagonal ring of strongly bounded atoms with weak interplate bonds
Explanation
Answer: (d)
Q.29
A fibrous material which can withstand red hot flames without any damage is
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a) Talc
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b) Glass wool
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c) Asbestos
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d) soap stone
Explanation
Answer: (c)
Q.30
In laboratory silicon can be prepared by the reaction of ..
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a) SiO2 with Mg
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b) By heating SiO2 with Al
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c) By heating potassium fluorosilicate
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d) None of the above
Explanation
SiO2 + Mg → Si + MgO2 Answer:(a)
0 h : 0 m : 1 s
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