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.




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

The heteroatoms present in: CH3 — CH2 — O — CH2 — CH2Cl are

[A]. Oxygen, Carbon
[B]. Carbon, Hydrogen
[C]. Hydrogen, Chlorine
[D]. Oxygen, Chlorine
Q4

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

[A]. CH4
[B]. C2H6
[C]. C3H8
[D]. C4H8
Q5

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.




Q6

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.
Q7

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

[A]. Buckminsterfullerene is a dark solid at room temperature.
[B]. Buckminsterfullerene is an allotrope of carbon containing clusters of 60 carbon atoms joined together to form spherical molecules.
[C]. There are twenty hexagons and twelve pentagons of carbon atoms in one molecule of buckminsterfullerene.
[D]. All the above..
Q8

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.
Q9

Pentane has the molecular formula C5H12. It has

[A]. 5 covalent bonds
[B]. 12 covalent bonds
[C]. 16 covalent bonds
[D]. 17 covalent bonds
Q10

In the last year board examination, Rahul were asked a question where he had to choose the statement which was/were incorrect? Will you be able to answer this question?

[A]. A compound made up of hydrogen and carbon only is called hydrocarbon.
[B]. The property of carbon element due to which its atoms can join with one another to form long carbon chains is called “carbonization”.
[C]. The study of carbon compounds (such as hydrocarbons and their derivatives) is called organic chemistry
[D]. None of the above.




Q11

Identify the unsaturated compounds from the following:

[A]. Propane, Propene
[B]. Propene, Chloropropane
[C]. Propyne, Chloropropane
[D]. Propene, Propyne
Q12

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.
Q13

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

[A]. Butanone
[B]. Butanol
[C]. Butanoic acid
[D]. Butanal
Q14

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.
Q15

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of:

[A]. Addition reaction
[B]. Substitution reaction
[C]. Displacement reaction
[D]. Oxidation reaction



Q16

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
Q17

Buckminsterfullerene is an allotropic form of

[A]. Phosphorus
[B]. Sulphur
[C]. Carbon
[D]. Tin
Q18

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.
Q19

A molecule of ammonia (NH3) has

[A]. Only single bonds
[B]. Only double bonds
[C]. Only triple bonds
[D]. Two double bonds and one single bond
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

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.
Q22

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
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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