Carbon and Its Compounds Class 10 MCQs with Answers
Carbon and Its Compounds – Class 10 MCQs with Answers
Class: 10 | Subject: Science
Section: Chemistry
Based on: NCERT Syllabus | CBSE Board Examinations
1. Valency of carbon is:
Answer: C
Carbon has four electrons in outer shell, forming four covalent bonds.
Carbon has four electrons in outer shell, forming four covalent bonds.
2. Bond formed by sharing electrons:
Answer: B
Carbon compounds mainly form covalent bonds.
Carbon compounds mainly form covalent bonds.
3. Simplest hydrocarbon:
Answer: B
Methane (CH₄) is the first alkane.
Methane (CH₄) is the first alkane.
4. Homologous series have same:
Answer: A
Members differ by –CH₂ but share functional group.
Members differ by –CH₂ but share functional group.
5. Functional group of alcohol:
Answer: B
Hydroxyl group defines alcohols.
Hydroxyl group defines alcohols.
6. Ethanol formula:
Answer: B
Contains –OH functional group.
Contains –OH functional group.
7. Ethanoic acid belongs to:
Answer: C
Contains –COOH group.
Contains –COOH group.
8. Soaps are sodium salts of:
Answer: B
Prepared from oils/fats by saponification.
Prepared from oils/fats by saponification.
9. Hard water reduces efficiency of:
Answer: B
Forms scum with Ca²⁺/Mg²⁺ ions.
Forms scum with Ca²⁺/Mg²⁺ ions.
10. Detergents work well in:
Answer: A
Do not form insoluble precipitates.
Do not form insoluble precipitates.
11. Catenation property of carbon means:
Answer: B
Carbon forms long chains.
Carbon forms long chains.
12. Double bond hydrocarbon:
Answer: B
Contains C=C bond.
Contains C=C bond.
13. Triple bond hydrocarbon:
Answer: C
Contains C≡C bond.
Contains C≡C bond.
14. Ester smells:
Answer: B
Pleasant fruity odor.
Pleasant fruity odor.
15. Esterification forms:
Answer: A
Alcohol + Acid reaction.
Alcohol + Acid reaction.
16. Allotropes of carbon:
Answer: A
Different structures.
Different structures.
17. Hardest natural substance:
Answer: B
3D network bonding.
3D network bonding.
18. Graphite used in:
Answer: A
Conducts electricity.
Conducts electricity.
19. Saturated hydrocarbons are:
Answer: A
Single bonds only.
Single bonds only.
20. Unsaturated hydrocarbons contain:
Answer: B
Reactive multiple bonds.
Reactive multiple bonds.