Hydrocarbon Objective Type Questions and Answers

Questions

21 How many isomeric alkanes of the molecular formula C5H12 are there?

A 1

B 2

C 3

D None of the above

View Answer

Answer: 3

22 The reaction of ethyne with which of the following gives CH2Br-CHBrCl?

A HCl, then HBr

B HCl, then Br2

C Cl2, then HBr

D Cl2, then Br2

View Answer

Answer: HCl, then Br2

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23 Dehydration of an alcohol leads to the formation of an _____ .

A alkene

B alkane

C alkyne

D None of the above

View Answer

Answer: alkene

24 A reaction in which a carboxylic acid reacts with a base to form a salt and water is called _____ .

A ionization

B esterification

C hydrolysis

D neutralization

View Answer

Answer: neutralization

25 Which of the following alcohols forms a ketone when oxidized?

A 1-propanol

B methanol

C 2-methyl-2-propanol

D 2-propanol

View Answer

Answer: 2-propanol

26 What is the sum of the coefficients in the balanced equation for the complete combustion of 2-methylbutane? Use smallest whole number coefficients. Do not forget coefficients of 1.

A 10

B 13

C 17

D 20

View Answer

Answer: 20

27 The organic starting materials for the preparation of an ester could be _______ .

A an acid and an alcohol

B a ketone and an alcohol

C an alkane and a ketone

D only an acid

View Answer

Answer: an acid and an alcohol

28 Hydrolysis (saponification) of a fat would yield ______ .

A water and an alkene

B ethanol and propanoic acid

C glycerol and soap

D ethanol and a soap

View Answer

Answer: glycerol and soap

29 Which of the following compounds is a functional group isomer of C2H5OH, ethanol (ethyl alcohol)?

A ethanal, CH3CHO

B acetic acid, CH3COOH

C diethyl ether, (C2H5)2O

D dimethyl ether, (CH3)2O

View Answer

Answer: dimethyl ether, (CH3)2O

30 Which one of the following compounds is an isomer of CH3CH2CH2CH2OH?

A CH3CH2CH2OH

B CH3CH(OH)CH3

C CH3CH2CH2CHO

D none of the above

View Answer

Answer: none of the above

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