Hydrocarbon Quiz | Hydrocarbon Objective Type Questions and Answers

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Questions
21 How many isomeric alkanes of the molecular formula C5H12 are there?
A 1
B 2
C 3
D None of the above

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

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

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

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

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

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

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

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

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

Answer: none of the above

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