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 2022-2023

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.

Q1

The first member of alkyne homologous series is:

[A]. Ethyne
[B]. Ethene
[C]. Propyne
[D]. Methane
Q2

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

[A]. A carbon atom has 4 electrons in its outermost shell.
[B]. Carbon atoms can achieve the inert gas electron arrangement only by the sharing of electrons, therefore, carbon always forms covalent bonds.
[C]. One carbon atom requires 8 electrons to achieve the eight-electron inert gas structure, therefore, the valency of carbon is 6.
[D]. None of the above.
Q3

Which of the following represents saponification reaction?

[A]. CH3COONa + NaOH + CaO → CH4 + Na2CO3
[B]. CH3COOH + C2H5OH + H2SO4 → CH3COOC2H5 +H2O
[C]. 2CH3COOH + 2Na → 2CH3COONa + H2
[D]. CH3COOC2H5 + NaOH → CH3COONa + C2H5OH
Q4

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.
Q5

Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g. hydrogen. After the formation of four bonds, carbon attains the electronic configuration of

[A]. Helium
[B]. Neon
[C]. Argon
[D]. Krypton
Q6

Vinegar is a solution of

[A]. 50% – 60% acetic acid in alcohol
[B]. 5% – 8% acetic acid in alcohol
[C]. 5% – 8% acetic acid in water
[D]. 50% – 60% acetic acid in water
Q7

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
Q8

Pentane has the molecular formula C5H12. It has

[A]. 5 covalent bonds
[B]. 12 covalent bonds
[C]. 16 covalent bonds
[D]. 17 covalent bonds
Q9

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.
Q10

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

[A]. A hydrocarbon in which the two carbon atoms are connected by a ‘double bond’ or a ‘triple bond’ is called an unsaturated hydrocarbon.
[B]. An alkane is a hydrocarbon in which the carbon atoms are connected by only single covalent bonds.
[C]. The general formula of saturated hydrocarbons or alkanes is CH2n.
[D]. None of the above.
Q11

Which of the following statement is or are incorrect?

[A]. The general formula of alkynes is CH2n +2 where n is the number of carbon atoms in one molecule of the alkyne.
[B]. The unsaturated hydrocarbons are obtained mostly from petroleum by a process called cracking.
[C]. An unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond is called an alkene.
[D]. The simplest alkene is ethene having the molecular formula C2H4.
Q12

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
Q13

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.
Q14

In which of the following compounds, — OH is the functional group?

[A]. Butanone
[B]. Butanol
[C]. Butanoic acid
[D]. Butanal
Q15

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

[A]. Ethane, ethene and ethyne are covalent molecules which are formed by the sharing of electrons between various atoms.
[B]. The ethyne molecule (C2H2) is made up of 2 carbon atoms and 2 hydrogen atoms.
[C]. The ethene molecule (C2H4) is made up of 2 carbon atoms and 4 hydrogen atoms.
[D]. All the above.
Q16

Consider the following statements and choose the correct one:

[A]. The group formed by the removal of one hydrogen atom from an alkane molecule is called an alkyl group.
[B]. An unsaturated hydrocarbon in which the two carbon atoms are connected by a triple bond is called an alkyne.
[C]. An unsaturated hydrocarbon in which the two carbon atoms are connected by a double bond is called an alkene.
[D]. All the above.
Q17

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.
Q18

Buckminsterfullerene is an allotropic form of

[A]. Phosphorus
[B]. Sulphur
[C]. Carbon
[D]. Tin
Q19

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.
Q20

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.
Q21

Which of the following statements are usually correct for carbon compounds? These

[A]. are good conductors of electricity, have strong forces of attraction between their molecules.
[B]. are poor conductors of electricity, have strong forces of attraction between their molecules.
[C]. are good conductors of electricity, do not have strong forces of attraction between their molecule.
[D]. are poor conductors of electricity, do not have strong forces of attraction between their molecules.
Q22

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.
Q23

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

[A]. The IUPAC name of the compound CH3COCH2CH2CH3 is pentanone.
[B]. The IUPAC name of the compound CH3COCH2CH3 is butanone.
[C]. The IUPAC name of CH3COCH3 is propanone
[D]. The common name of pentanone is ethyl methyl ketone.
Q24

Consider the following statements and choose the incorrect one:

[A]. The simplest ketone is acetone, CH3COCH3, which is also known as propanone.
[B]. The common name of propanal (CH3CH2CHO) is propionaldehyde.
[C]. Ethanal (CH3CHO) contains 2 carbon atoms, so its parent hydrocarbon is ethane.
[D]. None of the above.
Q25

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

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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
      electrons.

Why are covalent compounds poor conductors of electricity in 10th Science Chapter 4?

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 as per Class 10 Science Chapter 4?

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 in Chapter 4 of class 10 Science?

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 according to Class 10 Science Chapter 4?

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

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