Here are some multiple-choice questions (MCQs) for CBSE Chapter 4 Class 10 Science Carbon and its Compounds. According to the updated CBSE Syllabus, these MCQs are designed to help students become familiar with the question types and their difficulty levels. With the recent changes in the exam pattern, MCQs have become an important part of the Class 10 Science Board exam. To assist students in understanding these question types, we have compiled MCQs specifically for Chapter 4 to make fundamentals strong. Additionally, answers to these MCQs are also available for students to reference. These MCQs are available in this post, enabling students to access them at any time during their studies. Students can also use the CBSE Class 10 Sample Papers books for more practice.
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CBSE Class 10 Chapter 4 Carbon and its Compounds MCQs
Q.1. Vast amount of energy needed to run factories is obtained from
(a) nuclear reactors
(b) hydroelectric dams
(c) coal and petroleum products
(d) tidal waves.
Answer
Practice More – CBSE Practice Papers Class 10 (2024) – Free PDF Download
Q.2. Which of the following organic compounds does not have the same chemical properties as methanol?
(a) C2H6O
(b) C5H10O
(c) C4H10O
(d) C7H16O
Answer
Q.3. The given diagram shows the arrangement of valence electrons in organic compound Q, having molecular formula X2YZ2.
What could be the compound Q?
(a) Methanol (b) Ethanol
(c) Methanoic acid (d) Ethanoic acid
Answer
(c): From the given diagram,
Valence electrons in X = 1
Valence electrons in Z = 2
Valence electrons in Y = 4
Thus, X is hydrogen (H).
Y is carbon (C).
Z is oxygen (O) i.e., methanoic acid.
Thus, Q is HCOOH, i.e., methanoic acid.
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Q.4. An organic compound X with molecular formula C2H4O2 turns blue litmus red and gives brisk effervescence with sodium bicarbonate.
Identify the compound.
(a) Methanoic acid
(b) Ethanoic acid
(c) Ethanol
(d) Methanol
Answer
CH3COOH + NaHCO3 → CH3COONa + H2O + CO2
Q.5. Which of the following compounds can undergo an addition reaction with chlorine?
Answer
Q.6. The properties of two gases, P and Q, are given here.
(1) P dissolves in aqueous sodium hydroxide but Q does not.
(2) Q does not decolourise aqueous bromine.
(3) When Q burns in excess oxygen, the products are P and water only.
What are P and Q likely to be?
| p | Q | |
| (a) | Carbon dioxide | Ethane |
| (b) | Carbon dioxide | Ethane |
| (c) | Carbon monoxide | Ethane |
| (d) | Ethane | Ethane |
Answer
Q.7. The structural formula of 2-methyl-2-butene is
(a) CH3 – CH(CH3) – CH == CH2
(b) CH3 – CH2 – C(CH3) == CH2
(c) CH3CH == CH – CH3
(d) CH3CH == C(CH3)– CH3
Answer
Q.8. Structures of two different forms of carbon are given below:
Identify the two forms and how are they related to each other?
(a) Diamond, Graphite, Isotopes
(b) Graphite, Diamond, Allotropes
(c) C12, C14, Allotropes
(d) C14, C12, Isotopes
Answer
CBSE Class 10 Resources – Important Formula Book For 10th Science
Q.9. When the number of carbon atoms per molecule in alkanes increases,_________.
(a) the viscosity increases
(b) the flammability increases
(c) the density decreases
(d) the boiling point decreases
Answer
Q.10. An element P has electronic configuration (2, 4) and element Q has electronic configuration (2, 6). The formula of a compound formed by P and Q is
(a) Q—P—Q
(b) Q P Q
(c) Q P Q
(d) none of these
Answer
CBSE Class 10 Science Carbon and its Compounds MCQs – PDF Download
Answers-
Summary for NCERT class 10 science chapter 4 – “Carbon and its Compounds”
- Carbon is a versatile element that forms the basis for all living organisms and many of the things we use.
- This large variety of compounds is formed by carbon because of its tetravalency and the property of catenation that it exhibits.
- Covalent bonds are formed by the sharing of electrons between two atoms so that both can achieve a completely filled outermost shell.
- Carbon forms covalent bonds with itself and other elements such as hydrogen, oxygen, sulphur, nitrogen and chlorine.
- Carbon also forms compounds containing double and triple bonds between carbon atoms. These carbon chains may be in the form of straight chains, branched chains or rings.
- The ability of carbon to form chains gives rise to a homologous series of compounds in which the same functional group is attached to carbon chains of different lengths.
- The functional groups such as alcohols, aldehydes, ketones and carboxylic acids bestow characteristic properties to the carbon compounds that contain them.
- Carbon and its compounds are some of our major sources of fuels.
- Ethanol and ethanoic acid are carbon compounds of importance in our daily lives.
- The action of soaps and detergents is based on the presence of both hydrophobic and hydrophilic groups in the molecule and this helps to emulsify the oily dirt and hence its removal.
Best Reference Books for Class 10 Science
- NCERT Textbook + Exemplar Problems-Solutions
- Foundation Course Physics, Chemistry and Biology
- NCERT at your Fingertips Science
- 100 Percent Science
- CBSE 10 Years Chapterwise Topicwise Solved Papers AKA CBSE Champion
- CBSE Chapterwise Question Bank
- CBSE Score More 15 Sample Question Papers
We hope the MCQs for CBSE Class 10 Science Chapter 4 on Carbon and its Compounds are helpful for your board exam preparation.
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