CBSE Class 10 Science Chapter-4 Carbon and Its Compounds Important Questions – Free PDF Download
Free PDF download of Important Questions with Answers for CBSE Class 10 Science Chapter 4 – Carbon and Its Compounds prepared by expert Science teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination.
CBSE Class 10 Science Carbon and Its Compounds Chapter-4 Important Questions
CBSE Class 10 science Important Questions Chapter 4 – Carbon and Its Compounds
1 Mark Questions
1. Soaps are formed by the saponification of
(a) Alcohols
(b) simple ester
(c) carboxylic acids
(d) glycerides
Ans. (d) glycerides
2. The functional group of butanone is
(a) Carboxyl
(b) ketonic
(c) aldehydic
(d) alcoholic
Ans. (b) ketonic
3. Enzyme which converts starch into glucose is
(a) Zymase
(b) Maltase
(c) Diastase
(d) Invertase
Ans. (a) Zymase
4. The first compound to be prepared in the laboratory was
(a) Methane
(b) Ethyl alcohol
(c) acetic acid
(d) Urea.
Ans. (d) Urea.
5. The IUPAC name of 
is
(a) Acetaldehyde
(b) Formaldehyde
(c) Methyl formaldehyde
(d) Ethanal.
Ans. (d) Ethanal.
6. Rectified spirit is
(a) 50% ethanol
(b) 80% ethanol
(c) 95% ethanol
(d) 40 to 50% ethanol
Ans. (c) 95% ethanol
7. Dilute alkaline 
solution is
(a) an oxidising agent
(b) a reducing agent
(c) a bleaching agent
(d) none of these
Ans. (a) an oxidising agent
8. The by product in soap industry is
(a) Isoprene
(b) Ethylene glycol
(c) glycerol
(d) butane
Ans. (c) glycerol
9. An example of soap is
(a) 
(b) 
(c) 
(d) 
Ans. (a)
10. The number of C-H bonds in ethane 
molecule are
(a) 4
(b) 6
(c) 8
(d) 10
Ans. (b) 6
11. The odour of acetic acid resembles that of
(a) Rose
(b) Burning Plastic
(c) Vinegar
(d) Kerosene
Ans. (c) Vinegar
12. Diamond is not a good conductor of electricity because
(a) It is very hard
(b) Its structure is very compact
(c) It is not soluble in water
(d) It has no free electrons to conduct electric current.
Ans. (d) It has no free electrons to conduct electric current.
13. Alcohols can be produced by the hydration of
(a) Alkenes
(b) alkynes
(c) alkanes
(d) acids
Ans. (a) Alkenes
14. The IUPAC name of 
is
(a) Acetaldehyde
(b) formaldehyde
(c) methyl formaldehyde
(d) ethanol
Ans. (d) ethanol
15. IUPAC name of first member of homologous series of ketones is
(a) Ethanone
(b) methanone
(c) Propanone
(d) Butanone
Ans. (c) Propanone
16. An unknown compound has the smell of vinegar. Identify it.
Ans. Acetic acid
17. Out of butter and groundnut oil which is unsaturated in nature?
Ans. Groundnut oil
18. Which has triple bond, 
Ans. 
19. Which substance is added for the denaturation of ethyl alcohol
Ans. Methyl Alcohol
20. Which ions are responsible for making water hard?
Ans. 
and 
21. Ethane, with the molecular formula has
(a) 6 covalent bonds
(b) 7 covalent bonds
(c) 8 covalent bonds
(d) 9 covalent bonds
Ana. (b) 7 covalent bonds
22. Butanone is a four carbon compound with the functional group
(a) carboxylic acid
(b) aldehyde
(c) ketone
(d) alcohol
Ans. (c) Ketone
23. While cooking, if the bottom of the vessels is getting blackened on the outside, it means that
(a) the fuel is not cooked completely.
(b) the fuel is not burning completely.
(c) the fuel is wet.
(d) the is burning completely.
Ans. (b) the fuel is not burning completely.
24. Which of the following hydrocarbons undergo addition reactions?
Ans. 
will undergo addition reactions.