Class 10 Science Chapter 4 MCQ

Class 10 Science Chapter 4 MCQ (Multiple Choice Questions) of Carbon and its Compounds. These MCQs contains all the important questions from latest NCERT textbooks and are useful for all the students following NCERT Books.

Answers and explanation of each question is given below along with the questions. There are about 110 questions divided into sets of MCQ online tests.

Class 10 Science Chapter 4 MCQ for 2021-2022

Class: 10Science
Chapter: 4Multiple Choice Questions (MCQ) Tests

Class 10 Science Chapter 4 MCQ with Answers

Class 10 Science Chapter 4 MCQ Online tests practice with answers and explanation. Practice here to prepare your school test and board papers. Questions are taken form NCERT Books and answers are also confined to NCERT textbooks only.


Payal is completed her science chapter where she wrote some statements. She wants to know whether the statements are correct or not? Payal wants to take help from you:

[A]. The property of self-combination of carbon atoms to form long chains is useful to us because it gives rise to an extremely large number of carbon compounds.
[B]. The covalent bonds between the various carbon atoms are very weak and broken down easily.
[C]. The formation of strong bonds by carbon atoms among themselves and with other elements makes the carbon compounds exceptionally stable.
[D]. Element exhibits the property of self-combination known as catenation.

The name of the compound: CH3 — CH2 — CHO is:

[A]. Propanal
[B]. Propanone
[C]. Ethanol
[D]. Ethanal


Ethanol reacts with sodium and forms two products. These are

[A]. Sodium ethanoate and hydrogen
[B]. Sodium ethanoate and oxygen
[C]. Sodium ethoxide and hydrogen
[D]. Sodium ethoxide and oxygen

In the soap micelles:

[A]. The ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster.
[B]. Ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster.
[C]. Both ionic end and carbon chain are in the interior of the cluster.
[D]. Both ionic end and carbon chain are on the exterior of the cluster.


Identify the unsaturated compounds from the following:

[A]. Propane, Propene
[B]. Propene, Chloropropane
[C]. Propyne, Chloropropane
[D]. Propene, Propyne

Priya is writing some statements, choose the incorrect statement and help him:

[A]. The unsaturated hydrocarbons (having double bonds or triple bonds between the carbon atoms) are less reactive than saturated hydrocarbons.
[B]. The ethane molecule (C2H6) is made up of 2 carbon atoms and 6 hydrogen atoms.
[C]. The simplest alkyne is ethyne having the molecular formula C2H2.
[D]. An unsaturated hydrocarbon in which the two carbon atoms are connected by a triple bond is called an alkyne.


CH3 – CH2 – OH + Alkaline KMnO4 + Heat → CH3 – COOH. In the above given reaction, alkaline KMnO4 acts as

[A]. Reducing agent
[B]. Oxidising agent
[C]. Catalyst
[D]. Dehydrating agent

Read the following sentences carefully, and choose the incorrect one:

[A]. Normal-butane has a straight chain structure whereas iso-butane has a branched chain structure.
[B]. All the members of a homologous series can be represented by the different formula.
[C]. Isomerism is possible only with hydrocarbons having 4 or more carbon atoms.
[D]. The organic compounds having the same molecular formula but different structures are known as isomers.


Pooja is writing some statements but she confused to know whether the statements are correct or not? If you know the answer to this question, then tell her:

[A]. The alcohol group is made up of one oxygen atom and one hydrogen atom joined together.
[B]. That the elements chlorine, bromine and iodine are collectively known as halogens, so the chloro group, bromo group and iodol group are called halo groups.
[C]. An atom or ‘a group of atoms which makes a carbon compound (or organic compound) reactive and decides its properties (or functions) is called a functional group.
[D]. The carbon compounds (or organic compounds) containing carboxylic acid group (—COOH group) are called mineral acids.

In which of the following, 14 u, will be the differences in the molecular formulae and molecular masses:

[A]. CH3OH and C2H5OH
[B]. C2H5OH and C3H7OH
[C]. C3H7OH and C4H9OH
[D]. All of the above

Why does Carbon not form an ionic bonds?

There are two main reasons for not forming an ionic bonds.

    • It could gain four electrons forming C4– anion. But it would be difficult for the nucleus with six protons to hold on to ten electrons, that is, four extra electrons.
    • It could lose four electrons forming C4+ cation. But it would require a large amount of energy to remove four electrons leaving behind a carbon cation with six protons in its nucleus holding on to just two
Why are covalent compounds poor conductors of electricity?

Covalent compounds are formed by the sharing of electrons. Since the electrons are shared between atoms and no charged particles are formed, such covalent compounds are generally poor conductors of electricity.

What is meant by catenation?

The unique ability to form bonds combining one atom with other atoms of carbon, giving rise to large molecules is called catenation.

What is Glacial acid?

The melting point of pure ethanoic acid is 290 K and hence it often freezes during winter in cold climates. This gave rise to its name glacial acetic acid.

What are isomers?

Compounds with identical molecular formula but different structures
are called structural isomers.

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