MCQ Questions for Class 10 Science Carbon and Its Compounds with Answers: Students CBSE Board Exams 2020 Time Table is out now. The board is going to conduct a Class 10 CBSE Science Exam on 4th March 2020. As per their official notification, this time CBSE Exam Pattern 2020 is having slight changes. The board decided to add MCQ Questions for Class 10 CBSE Board Exams. Here, you will find important MCQs from CBSE Class 10 Science Chapter 4 Carbon and Its Compounds along with the answers.
CBSE Class 10 Science MCQs of Carbon and Its Compounds with Answers
Such Multiple Choice Type Questions are ideal to brushes your basic concepts to answer in CBSE Class 10 Science Exam 2020. Also, this objective type questions will help you to adjust with all various approaches. In this article, we have provided Carbon and Its Compounds MCQ Questions for Class 10 CBSE Science Exam 2020 with a detailed explanation of answers. It makes easy to grasp the in-depth concept and logic of the question. So, practice below provided MCQ’s of CBSE Class 10 Chapter 4 Carbon and Its Compounds topics to score maximum marks in your pre-board and final board exams.
Question 1. Which of the following statements are correct for carbon compounds?
(i) Most carbon compounds are good conductors of electricity.
(ii) Most carbon compounds are poor conductors of electricity.
(iii) Force of attraction between molecules of carbon compounds is not very strong.
(iv) Force of attraction between molecules of carbon compounds is very strong.
(a) (ii) and (iv)
(b) (ii) and (iii)
(c) (i) and (iv)
(d) (i) and (iii)
Answer
Answer: b
Question 2. C3H8 belongs to the homologous series of
(a) Alkynes
(b) Alkenes
(c) Alkanes
(d) Cyclo alkanes
Answer
Answer: c
Question 3.
(a) 2-ethyl-2-methyl propane
(b) 2, 2-demethyl butane
(c) 1,1,1-trimethyl propane
(d) 2, 2-methyl butane
Answer
Answer: b
Question 4. Which of the following is the formula of Butanoic acid?
Answer
Answer: d
Question 5. The number of isomers of pentane is
(a) 2
(b) 3
(c) 4
(d) 5
Answer
Answer: b
Question 6. Which of the following will undergo addition reactions?
(a) CH4
(b) C3H8
(C) C2H6
(d) C2H4
Answer
Answer: d
Question 7. When ethanoic acid is treated with NaHCO^ the gas evolved is
(a) H2
(b) CO2
(c) CH4
(d) CO
Answer
Answer: b
Question 8. Ethanol on complete oxidation gives
(a) acetic acid/ethanoic acid
(b) CO2 and water
(c) ethanal
(d) acetone/ethanone
Answer
Answer: b
Question 9. Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
(a) CH3COOH
(b) CH3CH2OH
(c) CH3OH
(d) CH3CHO
Answer
Answer: a
Question 10. Name the functional group present in CH3COCH3.
(a) Alcohol
(b) Carboxylic acid
(c) Ketone
(d) Aldehyde
Answer
Answer: c
Question 11. Why does carbon form compounds mainly by covalent bonding?
(a) There are four electrons in the outermost shell of carbon.
(b) It requires large amount of energy to form C4+ or C4sup>4-.
(c) It shares its valence electrons to complete its octet.
(d) All the above.
Answer
Answer: d
Question 12. Addition reactions are undergone by
(a) saturated hydrocarbons (alkanes)
(b) only alkenes
(c) only alkynes
(d) both alkenes and alkynes
Answer
Answer: d
Question 13. Identify ‘A’ in the following reaction:
CH3COOH + Na2CO3 → A + CO2 + H0O
(a) CH3COONa
(b) CH2(Na)COOH
(c) NaOH
(d) NaHCO3
Answer
Answer: a
Question 14. Which of the following belongs to homologous series of alkynes?
C6H6, C2H6, C2H4, C3H4.
(a) C6H6
(b) C2H4
(C) C2H6
(d) C3H4
Answer
Answer: d
Question 15. A hydrocarbon has four carbon atoms. Give its molecular formula if it is an alkene.
(a) C4H10
(b) C4H8
(C) C4H6
(d) C4H4
Answer
Answer: b
Question 16. Identify A and B
Answer
Answer: a
Question 17. Give the IUPAC name of CH3COOC2H5.
(a) Ethyl ethanoic acid
(b) Butanoate
(c) Ethyl ethanoate
(d) Etyl methyl carboxylic acid
Answer
Answer: c
Question 18. The firSt member of the alkyne homologous series is
(a) propyne
(b) ethyne
(c) methane
(d) ethene
Answer
Answer: b
Question 19. In diamond, each carbon atom is bonded to four other carbon atoms to form
(a) a hexagonal array
(b) a rigid three-dimensional structure
(c) a structure in the shape of a football
(d) a structure of a ring
Answer
Answer: b
Question 20. A soap molecule has a
(a) hydrophobic head and hydrophobic tail
(b) hydrophobic head and hydrophilic tail
(c) hydrophilic head and hydrophilic tail
(d) hydrophilic head and hydrophobic tail
Answer
Answer: d
Fill in the Blanks
1. ………. is a versatile element that forms the basis for all living organisms and many of the things we use.
2. Covalent bonds are formed by the ………. of electrons between two atoms so that both can achieve a
completely filled outermost shell.
3. The unsaturated hydrocarbons which contain one or more double bonds are called
4. The general formula of alkynes is ………. .
5. A group of organic compounds having similar structures and similar chemical properties in which the successive compounds differ by CH2 group is called a ………. .
6. ………. are sweet-smelling substances which are used in making perfumes.
ANSWERS
1. Carbon
2. sharing
3. alkenes
4. CnH2n-2
5. homologous series
6. Esters
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