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Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Class 10 MCQ


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25 Questions MCQ Test Science Class 10 - Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds for Class 10 2024 is part of Science Class 10 preparation. The Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds questions and answers have been prepared according to the Class 10 exam syllabus.The Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds below.
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Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 1

Which of the following will not decolourise bromine water?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 1

C3H8 is alkane and all other are alkene or alkyne. To decolourise the bromine water is the property of unsaturated compound not of saturated compound.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 2

Compounds made up of carbon and hydrogen only are called

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 2

The simplest organic compounds are made up of only carbon and hydrogen atoms. Compounds of carbon and hydrogen only are called hydrocarbons. For example, methane.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 3

Open-chain saturated hydrocarbons are called

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 3

Paraffins are also called Alkanes and have the general formula, CnH2n+2 , where n is the no. of carbon atoms in a given molecule. They are open - chain saturated hydrocarbons.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 4

The characteristic reaction of alkanes is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 4

The characteristic reaction of Alkanes is substitution reaction. They, being saturated cannot undergo addition reaction.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 5

The major constituent of biogas is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 5

Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture and siloxanes.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 6

n-butane and isobutane are

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 6




Isomers are compounds having the same molecular formula but different structures.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 7

Methane is a major constituent of

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 7

Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S).

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 8

The major constituent of natural gas is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 8

Natural gas is primarily composed of methane, but also contains ethane, propane and heavier hydrocarbons. It also contains small amounts of nitrogen, carbon dioxide, hydrogen sulphide and trace amounts of water.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 9

Ethanol on oxidation gives

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 9

Ethanol is oxidised to produce ethanal by removing two hydrogen atoms. Ethanal is then oxidised to produce ethanoic acid by adding an oxygen atom. The O:H ratio changes from 1:6 (ethanol) to 1:4 (ethanal) to 1:2 (ethanoic acid).

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 10

The functional group present in carboxylic acids is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 10

carboxylic acid contains -COOH group.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 11

A dilute solution of ethanoic acid in water is called

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 11

Ethanoic acid (also known as acetic acid) , if added to water to form a 5-8% solution, is called vinegar.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 12

Which of the following will undergo addition reactions?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 12

C2H4  will give addition reaction because they are connected by double or triple bond and are unsaturated hydrocarbon.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 13

Which of the following formula represents alkenes?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 13

The general formula for the alkenes is CnH2n . Cycloalkanes are a family of compounds where the carbon atoms are joined in a circle.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 14

The general formula of cyclic alkanes is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 14

Alkanes have the general formula CnH2n+2. For example, an alkane with 2 (n) carbon atoms, will have 6(2n + 2) hydrogen atoms. Cyclic alkanes are formed by removal of two H atoms from the terminal position.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 15

A carboxylic group is present in

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 15

Methanoic acid is HCOOH. Methane + oic acid = methanoic acid.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 16

The functional group in an alcohol is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 16

An alcohol is any organic compound in which the hydroxy functional group ( -OH) is bound to a saturated carbon atom. Ethyl alcohol is the predominant  alcohol in alcoholic beverages.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 17

Which of the following will react with sodium metal?

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 18

Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 18

Acetic acid gives a pleasant smell on rejection with ethanol due to the formation of ethyl acetate as :- 
CH3COOH  +C2H5OH → CH3COOC2H5 +H2O

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 19

The functional group in aldehydes is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 19

Aldehydes contain the functional group - CHO. It is a terminal functional group.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 20

Ethanol on complete oxidation gives

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 20

The correct option is A.
Ethanol is oxidised to produce ethanal by removing two hydrogen atoms. Ethanal is then oxidised to produce ethanoic acid, by adding an oxygen atom.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 21

Which class of organic compounds give effervescence with NaHCO3 solution ?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 21

The correct option is C.
Acetic acid that is Carboxylic acids gives effervescence with NaHCO3 solution.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 22

Carboxylic acids are obtained from alcohols by -

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 22

Primary alcohols and aldehydes are normally oxidized to Carboxylic acids using potassium Dichromate solution in the presence of dilute sulfuric acid.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 23

Soaps are prepared by alkaline hydrolysis of -

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 23

Saponification reaction is also known as alkaline hydrolysis of ester.

 

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 24

The functional group present in ethanol is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 24

Ethanol contains alcohol as the functional group.
Ethane + ol = Ethanol.

Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 25

How many structural isomers are possible for pentane-

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: Carbon & its Compounds - Question 25

Pentane (C5H12) has three structural isomers.


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