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.


Badal appeared in class test but he confused to know the correct statement. Would you help him to know that?

[A]. If we burn diamond in oxygen, then only carbon dioxide gas is formed and nothing is left behind.
[B]. Diamond does not conduct electricity.
[C]. Diamond and graphite are the two common allotropes of carbon which are known to us for centuries.
[D]. All the above.

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.


The soap molecule has a

[A]. Hydrophilic head and a hydrophobic tail
[B]. Hydrophobic head and a hydrophilic tail
[C]. Hydrophobic head and a hydrophobic tail
[D]. Hydrophilic head and a hydrophilic tail

Bikash is doing his homework which is given by his teacher. Would you help him to choose the correct sentences?

[A]. The ethene molecule (C2H4) is made up of 2 carbon atoms and 4 hydrogen atoms.
[B]. Each carbon atom shares three electrons with three hydrogen atoms to form three carbon-hydrogen single covalent bonds.
[C]. In ethane, the two carbon atoms share one pair of electrons among themselves to form one carbon-carbon single covalent bond.
[D]. All the above.


Which of the following statement is or are correct?

[A]. A saturated hydrocarbon containing single bonds is indicated by writing the word “ane” after the stem.
[B]. An unsaturated hydrocarbon containing a double bond is indicated by writing the word “ene” after the stem.
[C]. An unsaturated hydrocarbon containing a triple bond is indicated by writing the word “yne” after the stem.
[D]. All the above.

Recently, in a science class test, you are asked a question where you have to say whether the statements are correct or not?

[A]. Any two adjacent homologous differ by 1 carbon atom and 2 hydrogen atoms in their molecular Formulae.
[B]. The difference in the molecular masses of any two adjacent homologous is 16 u.
[C]. All the compounds of a homologous series show similar chemical properties.
[D]. The members of a homologous series show a gradual change in their physical properties with increase in molecular mass.

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.

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

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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