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Guess Paper – 2011
Class – X
Subject –Chemistry (Carbon and its Compounds)
Multiple choice questions:
1. Methane reacts with 1 mole of chlorine in presence of
sunlight to give the reaction is called
reaction.
a
b
c
d
Chloromethane, substitution
Chloromethane, substitution
Dichiorometharie, addition
Trichloromethane, substitution
2.The self linkage property (catenation) is maximum in
a
b
c
d
carbon
silicon
sulphur
phosphorus
3.The number of isomers of C6H14 are
a
b
c
d
4
5
6
3
4. Carboxylic acid containing one carbon atom is called
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a
b
c
d
Formic acid
Butyric acid
Acetic acid
Propanoic acid
5.Artificial flavour for orange is obtained from
a
b
c
d
amyl acetate
isoamyl valerate
melhyl butyrate
octyl acetate
6.Drinking alcohol is very harmful and it ruins the health.
"Drinking alcohol" stands for
a
b
c
d
drinking methyl alcohol
drinking ethyl alcohol
drinking propyl alcohol
drinking isopropyl alcohol
7.Which of the following statements about graphite and
diamond is true ?
a
b
c
d
They have the same crystal structure
They have the same degree of hardness
They have the same electrical conductivity
They can undergo the same chemical reactions
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8.The number of covalent bonds in C4H10 is
a
b
c
d
10
8
13
12
9.CHO represents the functional group
a esters
carboxylic
b
acid
c alcohols
d aldehydes
10.A functional group mainly determines the
a
b
c
d
physical properties
chemical properties
both
none of these
11.Solubility of alcohol in water is due to
a
b
c
low density of alcohol
volatile nature of alcohol
ionization
12.100% pure ethyl alcohol is called
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a
b
c
d
rectified spirit
absolute alcohol
denatured alcohol
power alcohol
Answer these questions:
1. Define isomer and give two examples
2. What is the IUPAC name of , CH3CH2CH═CH2 and CH3CHO
3. What is meant by term homologous series ?What is the general formula of
Alkenes
4. Classify the following as Alkane and alkyne,,
CH4, C2H4 , C2H2 , C2H6 , C3H4
5.Explain why carbon generally form compound by covalent bonding?
6. Give example of each
a..open chain
b. branched chain hydrocarbon
7. Why mixture of water and alcohol used instead of water only in radiators?
8. State any two uses of alcohol.
9. Give two differences between soap and synthetic detergent.
10. Write two test to demonstrate that acetic acid is acidic in nature.
Long answer questions:
1. Compound A is obtained from wood tar distillation . It has specific smell and
burning taste. It burns with blue flame to give CO2 and H2O . It is soluble in
water . It is used as fuel and solvent . It react with sodium metal and gives out H2
gas . It react with acetic acid to form pleasant fruit smelling compound B in
presence of conc. . H2SO4. Name A and B and write all reaction involve in
these.
2. Match A and B
A
a. Ethene
b. Ethanol
c. Ester
d. Soap
e. Detergent
B
1. Used in antifreeze
2. Fossil fuel
3. Fruity smell
4. Non biodegradable
5. Doesn’t give lather with hard water
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f. Coal
g. Hard water
h. Carboxy methyle
cellulose
i. PVC
j. Sodium perborate
6. Ca ion and Mg ion
7. Insulator
8. Helps in suspending dirt
9. Bleaching agent
10. Monomer of pollethene
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