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 2020-2021

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.


Which of the following does not belong to the same homologous series?

[A]. CH4
[B]. C2H6
[C]. C3H8
[D]. C4H8

In a science quiz competition, Deepti asked a question where she had to choose the statement which was/were incorrect?

[A]. The diamond crystal is, therefore, made up of carbon atoms which are powerfully bonded to one another by a network of covalent bonds.
[B]. The melting point of diamond is also very high, being more than 3500°C.
[C]. Diamond is a conductor of electricity as there are ‘free electrons’ in a diamond crystal.
[D]. None of the above.


Mineral acids are stronger acids than carboxylic acids because:

[A]. Mineral acids are completely ionized, carboxylic acids are partially ionized.
[B]. Carboxylic acids are completely ionized, mineral acids are partially ionized.
[C]. Mineral acids are completely ionized, carboxylic acids are completely ionized.
[D]. Mineral acids are partially ionized, Carboxylic acids are partially ionized.

Which of the following statement is or are incorrect?

[A]. The compounds of carbon are known as organic compounds.
[B]. Although oxides of carbon (like carbon monoxide and carbon dioxide), carbonates, hydrogen carbonates and carbides are also carbon compounds and they are considered to be organic compounds.
[C]. Most of the carbon compounds are non-conductors of electricity.
[D]. Carbon compounds (or organic compounds) are covalent compounds having low melting points and boiling points.


Chlorine reacts with saturated hydrocarbons at room temperature in the:

[A]. Absence of sunlight
[B]. Presence of sunlight
[C]. Presence of water
[D]. Presence of hydrochloric acid

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.


Buckminsterfullerene is an allotropic form of

[A]. Phosphorus
[B]. Sulphur
[C]. Carbon
[D]. Tin

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.

Carbon exists in the atmosphere in the form of:

[A]. Only carbon monoxide
[B]. Carbon monoxide in traces and carbon dioxide
[C]. Only Carbon dioxide
[D]. Coal

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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