MCQ Questions for Class 10 Science Chapter 4 Carbon and its Compounds
Using MCQ Questions for Class 10 Science Chapter 4 Carbon and its Compounds is a great way to improve your marks in the exams. MCQs are used in exams as a way to measure a student’s knowledge and understanding of the material.
Chapter 4 Class 10 Science CBSE MCQ Questions can help you develop a positive mindset and enhance your skills. It can be used as a assessment tool to help students identify areas where they need more study.
Chapter 4 Carbon and its Compounds Class 10 Science MCQ Questions
1. The name of the compound CH3-CH2-CHO is :
(a) Propanal
(b) Propanone
(c) Ethanol
(d) Ethanal
▶ (a) Propanal
2. Which of the following does not belong to the same homologous series?
(a) CH2
(b) C2H6
(c) C3H6
(d) C4H8
▶ (d) C4H8
3. The first member of alkyne homologous series is :
(a) Ethyne
(c) Propyne
(b) Ethene
(d) Methane
▶ (a) Ethyne
4. A molecule of ammonia (NH) has
(a) only single bonds
(c) only triple bonds
(b) only double bonds
(d) two double bonds and one single bond
▶ (a) only single bonds
5. Which of the following is not the use of graphite?
(a) It is used as lubricant
(b) It is used in manufacturing of lead-pencils
(c) It is used in manufacturing of artificial diamond
(d) It is used for making insulated plates
▶ (d) It is used for making insulated plates
6. Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, example, hydrogen. After the formation of four bonds, carbon attains the electronic configuration of
(a) Helium
(b) Neon
(c) Argon
(d) Krypton
▶ (b) Neon
7. Which of the following is correct about the structure of diamond?
(a) Carbon atoms are held together by single covalent bonds.
(b) Electrons move freely through the structure.
(c) Layers of atoms slide easily over each other.
(d) Carbon atoms conduct electricity in the molten state.
▶ (a) Carbon atoms are held together by single covalent bonds.
8. All the members of homologous series of alkynes have the general formula
(a) CnH2n
(b) CnH2n+2
(c) CnH2n-2
(d) CnH2n-4
▶ (c) CnH2n-2
9. Which of the following statements is correct?
(a) Most organic compounds are ionic compounds.
(b) Ethane and ethene belong to the same homologous series.
(c) Propene contains three hydrogen atoms per molecule.
(d) Chloroethane contains two carbon atoms per molecule.
▶ (d) Chloroethane contains two carbon atoms per molecule.
10. Select the correct statement about the properties of acetic acid.
(a) It smells like vinegar and turns red litmus to blue.
(b) It is insoluble in water and turns blue litmus to red.
(c) It is soluble in water and turns red litmus to blue.
(d) It smells like vinegar and turns blue litmus to red.
▶ (d) It smells like vinegar and turns blue litmus to red.
11. You have neem oil in a beaker. In order to study saponification reaction, which of the following chemical substances would you add to this oil?
(a) 20% Ca(OH)2
(b) 20% NaOH
(c) 30% Mg(OH)2
(d) 10% Ca(OH)2
▶ (b) 20% NaOH
12. How many structural isomers are possible for pentane (C5H12)?
(a) 1
(b) 4
(c) 2
(d) 3
▶ (d) 3
13. _______ is widely used as a fuel and is a major component of bio-gas and CNG. It is also one of the simplest compounds formed by
carbon.
(a) Ethane
(b) Propane
(c) Carbon dioxide
(d) Methane
▶ (d) Methane
14. Some students studied the physical properties of acetic acid and noted down their observations. Which of the following observations is correct?
(a) Smells like rose and soluble in water.
(b) Smells like burning plastic and insoluble in water.
(c) Smells like vinegar and soluble in water.
(d) Smells like rotten egg and soluble in water.
▶ (c) Smells like vinegar and soluble in water.
15. In C6H14 the number of possible isomers is
(a) 3
(b) 6
(c) 4
(d) 5
▶ (d) 5
16. Which of the following statements is correct about a substance that has a giant covalent structure?
(a) All its ions are arranged in a giant three dimensional lattice.
(b) A large amount of energy is needed to break down the lattice structure.
(c) It conducts electricity in the molten state.
(d) It dissolves in water but is more soluble in organic solvents.
▶ (b) A large amount of energy is needed to break down the lattice structure.
17. Which type of bond is present between carbon-carbon atoms in acetylene?
(a) Single covalent bond
(b) Double covalent bond
(c) Triple covalent bond
(d) Electrovalent bond
▶ (c) Triple covalent bond
18. You are asked to prepare hard water in your laboratory. Select a group from the following groups of salts, any salt of which you may dissolve in distilled water to obtain hard water.
(a) NaCl; Na2SO4; KCI
(b) NaCl; CaCl2; KCI
(c) CaCl2; CaSO4; MgSO4
(d) Na2SO4; CaSO4; MgSO4
▶ (c) CaCl2; CaSO4; MgSO4
19. Number of free electron(s) in each carbon atom in graphite is/are
(a) two
(b) four
(c) one
(d) three
▶ (c) one
20. A student wants to prepare soap in the laboratory. Which of the following sets of materials he should use?
(a) Neem oil and NaCl
(b) Neem oil and Na2CO3
(c) Mustard oil and NaOH
(d) Mineral oil and NaOH
▶ (c) Mustard oil and NaOH
21. The chemical mostly used in the preparation of most of the soaps we use is :
(a) Sodium chloride
(b) Potassium hydroxide
(c) Sodium hydroxide
(d) Potassium chloride
▶ (c) Sodium hydroxide
22. Which of the following molecules has all its atoms joined together by double covalent bonds?
(a) Methane
(b) Water
(c) Carbon dioxide
(d) Nitrogen trichloride
▶ (c) Carbon dioxide
23. The bond between two identical non-metallic atom has a pair of electron:
(a) unequally shared between two atoms.
(b) transferred completely from one atom to another.
(c) with identical spins.
(d) equally shared between them.
▶ (d) equally shared between them.
24. Which of the following is not a characteristic of members of a homologous series?
(a) They possess varying chemical properties.
(b) Their physical properties vary in regular and predictable manner.
(c) Their formulae fit the general molecular formula.
(d) Adjacent members differ by one carbon and two hydrogen atoms.
▶ (a) They possess varying chemical properties.
25. A student is testing water to know which is best for cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from :
(a) rain
(b) tap
(c) hand pump
(d) pond
▶ (a) rain
26. Which covalent molecule contains the structure where the central atom is bonded to four other atoms by covalent bonds?
Diamond
Graphite
Methane
Silicon dioxide
(b) 2 and 4
(a) 1 and 2
(c) 3 and 4
(d) 1, 3 and 4
▶ (d) 1, 3 and 4
27. Ethanoic acid was added to sodium carbonate solution and the gas evolved was tested with a burning splinter. The following four observations were reported. Identify the correct observation.
(a) The gas burns with pop sound and the flame gets extinguished
(b) The gas does not burn but the splinter burns with
(c) The flame extinguishes and the gas does not burn gas
(d) The pop sound burns with a blue flame and the splinter burns brightly
▶ (c) The flame extinguishes and the gas does not burn gas
28. The upper and lower homologue of C2H5OH are respectively
(a) methyl alcohol and butyl alcohol
(b) ethyl alcohol and propyl alcohol
(c) butyl alcohol and propyl alcohol
(d) propyl alcohol and methyl alcohol
▶ (d) propyl alcohol and methyl alcohol