Chemistry Chapter Organic Compounds Important MCQs

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

bucky ball

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

coal gas

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

carbon detection in organic compound

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

detection of hydrogen in organic compound

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

sulphur detection in organic compound

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

presence of iodine in organic compound

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

lassaigne’s solution apparatus

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

hydrogen presence in organic compound

Answer:

b) Deep blue


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