CBSE Class 10 Science Chemistry Carbon and its compounds Assignment

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CBSE Class 10 Science Chemistry Carbon and its compounds Assignment. Students are advised to refer to the attached assignments and practice them regularly. This will help them to identify their weak areas and will help them to score better in examination. Parents should download and give the assignments to their children for practice.



1. What is the unique property of carbon atom? How is this property helpful to us?

2 .Why is graphite a good conductor of electricity but diamond is a non-conductor of electricity?

3 .Write the electron dot structure for: 

(a) Ammonia (NH3)

(b) Nitrogen (N2)

(c) Ethyne (C2H2)

(d) Carbon dioxide (CO2)

(e) Benzene (C6H6)

(f) Cyclopentane

4.The molecular formula of A is C10H18 and B is C18H36.Name the homologous series to which they belong. 

5. Classify the following compounds as alkanes, alkenes and alkynes.

C2H4 , C3H4 , C4H8 , C5H12 , C5H8 , C3H8


6. Why carbon forms compounds by sharing of electrons and not by the formation of ions?

7. State the meaning of functional group.Write the functional group present in (a)Ethanol and(b) Ethanoic acid and also draw their structures.


 Important MCQs for NCERT Class 10 Science Carbon and its Compounds

1. Which of the following structures correctly represents the electron dot structure of a chlorine molecule:

CBSE Class 10 Science Chemistry Carbon and its compounds Assignment

Answer : A

2. While cooking, if the bottom of the vessel is getting blackened on the outside, it means that:
A) The food is not cooked completely
B) The fuel is not burning completely
C) The fuel is wet
D) The fuel is burning completely

Answer :  B

3. Cation is formed when:

A) Atom gains electrons
B) Atom loses electrons
C) Proton is lost by the atom
D) Atom shares electrons

Answer :  B

4. The property of self-linkage among identical atoms to form long chain compounds is known as:

A) Catenation
B) Isomerisation
C) Superposition
D) Halogenation

Answer :  A

5. Which of the following statements about graphite and diamond is true:
A) They have the same crystal structure
B) They have the same degree of hardness
C) They have the same electrical conductivity
D) They can undergo the same chemical reactions

Answer :  D

6. The byproduct of soap is:
A) Isoprene
B) Glycerol
C) Butane
D) ethylene glycol

Answer :  B

7. Carbon exists in the atmosphere in the form of:
A) Only carbon monoxide
B) Carbon monoxide in traces and carbon dioxide
C) Only carbon dioxide
D) Coal

Answer :  C

8. A molecule of ammonia (NH3) has:

A) Only single bonds
B) Only double bonds
C) Only triple bonds
D) Two double bonds and one single bond

Answer :  A

9. In which of the following compounds -OH is the functional group:
A) Butanone
B) Butanol
C) Butanoic
D) Butanal

Answer :  B

10. Chlorine reacts with saturated hydrocarbons at room temperature in the:
A) absence of sunlight
B) presence of sunlight
C) presence of water
D) presence of hydrochloric acid

Answer :  B

11. Hydrocarbon are compounds made of:
A) C & H
B) C & O
C) C & H2O
D) C & He

Answer :  A

12. Which among the following can react with sodium metal:
A) Ethane
B) Propane
C) Ethanol
D) Ethene

Answer :  C

13. –CHO Group is:
A) Aldehydic group
B) Alcholic group
C) Ketonic group
D) Acidic Group

Answer : A

14. Natural Rubber is a polymer of:
A) Chloroprene
B) Isoprene
C) Propene
D) Neoprene

Answer : B

15. The number of covalent bonds in C4H10 is:

A) 10
B) 11
C) 12
D) 13

Answer : D


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