Organic Compounds Important MCQs with Answers
Class 12 Chemistry Chapter Organic compounds important multiple choice questions with answers are as follow:
1. The process in which an organic molecule is synthesized from the small and cheap readily available molecules is known as:
a) Fractional distillation
b) Distillation
c) Total synthesis
d) Partial synthesis
Answer:
c) Total synthesis
2. Benzene and Toluene is obtained from:
a) Crude oil
b) Coal tar
c) Carbon gas
d) Coke
Answer:
b) Coal tar
3. The simplest buckyball is:
a) C50
b) C60
c) C70
d) C40

Answer:
b) C60
4. The class sulphone is represented by which of the following functional group:
a) R2SO
b) R2S
c) R2SO2
d) RSH
Answer:
C) R2SO2
4. Ethyl benzoate is:
a) an alcohol
b) an ether
c) an ester
d) an aldehyde
Answer:
c) an ester
5. Coal gas mainly consists of which of the following:
a) Methane
b) ammonia
c) Carbon dioxide
d) Hydrogen sulphide
Answer:
a) Methane

6. Carbon has a unique ability to form long chains. This property of self-linking of carbon is known as:
a) Polymerization
b) Condensation
c) Cyclization
d) Catenation
Answer:
d) Catenation
7. Carbon tetrachloride, also known as tetrachloromethane is an organic compound that is used as:

a) Lubricant
b) Oxidant
c) Solvent
d) Plastic
Answer:
c) Solvent
8. When CO2 is passed through lime water it turns milky due to the formation of:
a) Ca (OH)2
b) CaCO3
c) CuSO4
d) Ca (OH)2.5H2O

Answer:
b) CaCO3
9. On heating an organic compound in the presence of CuO, the hydrogen is oxidized to:
a) CH2O
b) H2
c) H2O2
d) H2O

Answer:
d) H2O
10. Which reagent is used for the detection of Sulphur in an organic compound?
a) Lead sulphate
b) Lead acetate
c) Lead sulphide
d) Ferrous sulphate

Answer:
b) Lead acetate
11. When AgNO3 solution is added to an aqueous solution of AgX , deep yellow ppt. are formed which are insoluble in NH4OH. It shows the presence of:
a) Fluorine
b) Bromine
c) Chlorine
d) Iodine

Answer:
d) Iodine
12. Which of the following is used in the preparation of Lassaigne’s solution:
a) CuO
b) Mg
c) Na
d) Pb

Answer:
c) Na
13. If a molecule contains more than one functional group, it is known as:
a) Derivative
b) Polyfunctional
c) Heterocyclic
d) Isomer
Answer:
b) Polyfunctional
14. In Organic compounds carbon atoms form:
a) Ionic bond
b) Covalent bond
c) Hydrogen bonding
d) All the above
Answer:
b) Covalent bond
15. When water vapours are passed over white anhydrous copper sulphate, which colour is formed due to the formation of CuSO4.5H2O?
a) White
b) Deep blue
c) Yellow
d) Brown

Answer:
b) Deep blue
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