Practice question:-
1.The nature of the chemical bond in
diamond is:-
(a) Ionic (b)Covalent
(c)
Coordinate (d) Metalic
2.The most hardest substance form of
carbon is:-
(a)
Graphite (b) Diamond
(c) Lamp
black (d) Charcoal
3.Which one of the following forms of
coal has the lowest percentage of carbon?
(a)
Peat (b) Lignite
(c)
Bituminous (d) Anthracite
4.Which one of following is not an
allotrope of carbon?
(a)
Graphite (b) Diamond
(c) Coal (d) Carborundum
5.Which property of graphite is used
for making electrodes?
(a) Soft
and slippery (b) Opaque
(c) Good
conductor of electricity
(d) None
of the above
6.A man slept in closed room with a
coal fire burning room .He became unconscious due to the formation of
(a)
Carbon dioxide in room (b) Coke
(c) Carboxyhaemoglobin in his blood
(d) Charcoal
7.Dry ice is a
(a) Solid
ice without water
(b) Solid
carbon dioxide
(c) solid
sulphate dioxide
(d) Solid
benzene
8.Which one of yhe following gas will
turn the lime water milky?
(a)Co2 (b) Co
(c) N2 (d) Cl2
9.Carbon is soluble in
(a)
conc.H2SO4
(b) conc. HCl
(c)conc.HNO3 (d) dil.HCL
10.When graphite is heated at extremely high
pressure and at very high temperature,the product obtain is
(a)Carbon
dioxide (b) Diamond
(c)
Carbon monoxide (d) Peat
11.Soda ash is
(a) NaHCO3 (b)Na2CO3
(c) CaCO3 (d)Ca(HCO3)2
12. Lime stone is chemically
(a)Cao
(b)Caco3
(c)Ca(OH)2
(d)Ca(HCO3)2
13.Graphite is used in nuclear reactor
(a) as a
lubricant
(b) as a
fuel
(c) for
lining the inner side of the reactor as an insulator
(d) for
reducing the velocity of neutrons
14.The product obtained by the
incomplete combustion of organic compound is
(a) CO
(b) CO2
(c) C2H2
(d) C2H4
15. Which property of diamond makes it
useful for cutting glass?
(a) Bad
conductor of electricity
(b)
Hardest substance
(c) High
density
(d)
Transparent
Answer:-
1.(b) 2.(b) 3.(a)
4.(d) 5.(c) 6.(c) 7.(b) 8.(a) 9.(c) 10.(b) 11.(b) 12.(b) 13.(d) 14.(a)
15.(b)
0 Comments
कमेंट केवल पोस्ट से रिलेटेड करें