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.

Q1

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.
Q2

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

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




Q3

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..
Q4

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.



Q5

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.
Q6

Identify the unsaturated compounds from the following:

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



Q7

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.
Q8

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
Q9

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.
Q10

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
      electrons.
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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