10th Class Chemistry Chapter 12 MCQs with Answers

The following are 10th Class Chemistry Chapter 12 MCQs. We have collected these MCQs for online Test Preparation and academic as well as Competitive Exams all board exams in Pakistan, and CSS, PMS, college, and University Entrance tests, MDCAT tests, NTS tests, GAT, GRE, Entry Tests, etc. You can easily prepare yourself for any Test. These chemistry MCQs are also important for Teaching Jobs like SST, Subject Specialist, Lecturer, or Teaching Assistant. We have organized the 10th class chemistry chapter wise so you can find all the MCQs by clicking on the link of each chapter. 

10th Class Chemistry Chapter 12 MCQs with Answers

10th Class chemistry  MCQS Available Here. On these pages, you can get 10th Class chemistry MCQs with Answers.
You can read and practice, 10th Class Chemistry MCQs on Different topics, We make an Online question bank with the help of experienced teachers and subject specialists.

10th Class students of all educational boards can prepare for their exams online here on our site and by attempting these online MCQs they can make sure their preparation level for their annual exams is perfect. 10th Class Chemistry Chapters include Chapter 9 – Chemical Equilibrium, Chapter 10 – Acid, Base, and Salts, Chapter 11 – Organic Chemistry, Chapter 12 – Hydrocarbons, Chapter 13 – Biochemistry, Chapter 14 – The Atmosphere, Chapter 15 – Environmental Chemistry and Chapter 16 – Chemical Industries

What are HYDROCARBONS?

A hydrocarbon is any of a class of organic chemicals made up of only the elements carbon (C) and hydrogen (H). The carbon atoms join together to form the framework of the compound, and the hydrogen atoms attach to them in many different configurations. chemical compound. Learn more about chemical compounds.

CHAPTER NO 12 HYDROCARBONS

1 Which among the following isn’t a hydrocarbon?

(a) Methane (CH4)

(b) Ethane (C2H6)

(c) Water (H20)

(d) Ethyne (C2H2)

2 Carbon has valency:

(a) 3

(b) .

(c) 5

(d) 6

3 Which of the following property is not present in hydrocarbons?

(a) High melting point

(b) Non-polar property

(c) Solubility in non-polar solvent

(d) Poor conductivity:

4 Hydrocarbons having high molecular mass are:

(a) Gases

(b) Liquid

(c) Solids .

(d) All of these

5 Hydrocarbons having double bond are

(a) Alkane

(b) Alkene

(c) Alkyne

(d) Alkyl

6 Methane forms natural gas about

(a) 84% . . .

(b) 85%

(C) 86%

(d) 87%

7 The density of alkane increases with the increase of

(a) M.P

(b) B.P

(c) Molecular size

(d) Bonds.

8 Which are the characteristics property of alkanes

(a) Displacement reactions

(b) Double displacement reaction

(c) Substitution reaction

(d) Redox reaction

9 Incomplete combustion of alkanes produce

(a) Carbon dioxide

(b) Oxygen

(c) Chlorine gas

(d) Carbon monoxide

10 Alkynes being more reactive than

(a) Alkanes .

(b) Alkenes

(c) Both a & b

(d) None of these

11 Dehydrohalogenation of alkyl halides take place in the presence of

(a) Alcoholic KOH

(b) Aqueous NaCl

(c) Alcoholic NaCl

(d) Aqueous KOH

12 A solution of bromine in water having colour

(a) Dark brown’

(b) Purple

(c) Red – brown

(d) Violet

13 Traces of acetylene are present in coal gas about

(a) 0.06%

(b) 0.07%

(c) 0.08%

(d) 0.09%

14 What is the formula of methane

(a) CH3

(b) CH4

(c) CH2

(d) C2H5

15 Formula of nascent hydrogen is

(a) H2

(b) [H]

(c) H3

(d) All of these

16 Which of the following is not an organic solvent

(a) C2H5OH

(b) CHCl3

(c) CCI4

(d) H2O

17 Methane is also called

(a) Marsh gas

(b) Inert gas

(c) Natural gas

(d) Both (a) and (c).

18 Alkenes is also called

(a) Paraffins

(b) Olefins

(c) Acetylenes

(d) All of above

19 · Ethene reacts with H2SO4 at temperature of

(a) 150°C

(b) 16°C

(c) 180°C

(d) 453 K

20 Banaspati Ghee is also called

(a) Vegetable oil

(b) Margarine

(c) Cooking oil

(d) Coconut oil

21 Ethylene oxide is used as

(a) Anti-freezer

(b) Solvent

(c) Fumigant

(d) Poisonous mustard gas

22 Banana when riped produces gas

(a) Ethene

(b) Methane

(c) Noble gas

(d) Oxygen gas

23 Addition of hydrogen is called

(a) Reduction

(b) Oxidation

(c) Redox

(d) All of these

24 Which of the following is not a example of open chain hydrocarbon

(a) CH4

(b) C3H2

(c) C2H6

(d) C6H6

25 Number of bonds present in methane

(a) 2

(b) 3

(c) 4

(d) 5

26 Which of the following is not a function of chloroform

(a) Solvent in rubber

(b) Dry cleaning

(c) Solvent in waxes

(d) Anaesthesia

27 Which of the following has higher energy

(a) Alkane

(b) Alkene

(c) Alkyne

(d) All of these

28 Which is used as Antifreeze

(a) Di-ethyl ether

(b) Ethyl alcohol

(c) Ethylene oxide

(d) Ethylene glycol

29 Alkanes are also called

(a) Paraffins

(b) Olefins

(c) Acetylenes

(d) Acetaldehyde

30 Due to increase in molar mass which property increases

(a) B.P

(b) M.P

(c) Volatility

(d) Both a & b

31 The compound having at least one benzene ring are called

(a) Aromatics

(b) Alkane

(c) Alkene

(d) Alkyne

32 What is the most necessary condition for the reaction of CH4 with halogen?

(a) Catalyst

(b) Pressure

(c) Sunlight

(d) High temperature

33 Glyoxal is oxidize into

(a) KMnO4

(b) Glycol

(c) Oxalic acid

(d) Acetic acid

34 The example of rubber’s are:

(a) Neoprene

(b) Butadiene

(c) Chloroprene

(d) Furan

35 Which among the following is a synthetic fibre

(a) Nylon

(b) Rayon

(c) Polyesters

(d) All of these

36 Detergents are the sodium salts of

(a) Sulphuric acid

(b) Alkyl hydrogen sulphite

(c) Sodium carbonate

(d) Cholesteryl benzoate

37 Due to which property alkane are used a fuel

(a) Combustion

(b) Halogenation

(c) Oxidation

(d) Reduction

38 Alcohol is soluble in water due to

(a) Hydrogen bonding,

(b) Lone pair of water

(c) Covalent bonding

(d) All of above

39 Which of the following is not alcohol

(a) C2H5OH

(b) C3HOH

(c) CH3OH

(d) Ca(OH)2

40 paraffins means

(a) Highly reactive

(b) Less reactive

(c) Oil forming

(d) None of these

41 Number of bonds in propene is

(a) 6

(b) 7.

(c) 8

(d) 9

42 Which compound is used for welding process

(a) CH4

(b) KMnO4

(c) Acetylene

(d) Ethylene

43 Amorphous forms of carbons are

(a) Coal

(b) Charcoal

(c) Carbon black

(d) All of these

44 Alkenes are insoluble in

(a) Organic solvent

(b) Alcohol

(c) Water (H2O)

(d) Both b&c

45 Which of the following does not occur free in nature

(a) Ethylene

(b) Acetylene

(c) Propylene

(d) Pentene

46 The formula of oxalic acid is

(a) (COOH)2

(b) HCOOH

(c) CH3COOH

(d) COOH

47 Alkyne forms

(a) Single bond

(b) Double bond

(c) Triple bond

(d) Ionic bond

48 Di-methyl acetylene is also called

(a) Ethyne

(b) Propyne

(c) Butyne

(d) Hexane

49 Which one of the following is a substitution reaction

(a) Halogenation of alkane

(b) Dehydration of alkane

(c) Hydrolysis of alkane

(d) Hydrogenation

50 Alkanes having carbon range are liquid

(a) C4 to C6.

(b) C5 to C10

(c) C8 to C10.

(d) Both a & b

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