Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes MCQs | Class 12 Chemistry Chapter 10 Haloalkanes and Haloarenes Objective Type Questions and Answers

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Questions
1 Chloropicrin is formed by the reaction of
A steam on carbon tetrachloride
B nitric acid on chlorobenzene
C chlorine on picric acid
D nitric acid on chloroform

Answer:nitric acid on chloroform
2 Fitting reaction can be used to prepare
A Toluene
B Acetophenon
C Diphenyl
D Chlorobenzene

Answer:Diphenyl
3 In the above reaction, the product D is
A Propane
B 2, 3-Dimethylbutane
C Hexane
D Allyl bromide

Answer:2, 3-Dimethylbutane
4 Fitting reaction can be used to prepare
A Toluene
B Acetophenon
C Diphenyl
D Chlorobenzene

Answer:Diphenyl
5 Identify the end product (C) in the following sequence:
5
A 5.1
B 5.2
C 5.3
D 5.4

Answer: 5.3
6 6
In the above reaction, the product D is
A Propane
B 2, 3-Dimethylbutane
C Hexane
D Allyl bromide

Answer:2, 3-Dimethylbutane
7 Identify X and Y in the following sequence
7
A X = KCN, Y = LiAlH4
B X = KCN, Y = H3O+
C X = CH3Cl, Y = AlCl3 HCl
D X = CH3NH2, Y = HNO2

Answer:X = KCN, Y = LiAlH4
8 In the following sequence of reactions:
8
A n-propylamine
B isopropylamine
C ethylamine
D ethylmethylamine

Answer:ethylmethylamine
9 9
A 9.1
B 9.2
C 9.3
D 9.4

Answer: 9.1
10 Identifay Z in the series
10
A C2H5I
B C2H5OH
C CHI3
D CH3CHO

Answer: CHI3
11 Of the options give, the one statement about trichloromethane (Chloroform) that is correct is ____
A It should be stored in a well ventilated place, exposed to sunlight.
B In the presence of air or light, chloroform is slowly oxidized into a poisonous compound phosgene.
C Chloroform gets reduced with zinc dust and water to form Methylene chloride.
D Chloroform is converted into carbon tetrachloride on warming with silver powder.

Answer: Chloroform is converted into carbon tetrachloride on warming with silver powder.
12 Aryl chlorides and bromides can be easily prepared by ____ of arenes with chlorine and bromine respectively in the presence of Lewis acid catalysts like iron or iron (III) chloride.
A Electrophilic addition
B Electrophilic substitution
C Nucleophilic addition
D Nucleophilic substitution

Answer: Electrophilic substitution
13 At room temperature ethyl chloride, methyl bromide, ethyl chloride and some chlorofluoromethanes exist as____.
A Liquid
B Solid
C Gas
D Some of them solid and other liquid

Answer: Gas
14 When we go down the group 17 in the periodic table, the one option that is incorrect is ____.
A size of the halogen atoms increases
B change in size of halogen atom results in increase in carbon-halogen bond length
C change in size of halogen atom results in carbon-halogen bond enthalpy (kJ mol-1) decrease
D reactivity of halogens increases

Answer:reactivity of halogens increases
15 Triodomethane (Iodoform) was earlier used as an
A analgesic
B antiseptic
C antihistamine
D antibiotic

Answer:antiseptic
16 The chloroflurocarbon compounds of methane and ethane are collectively known as ____
A haloalkanes
B alkyl halides
C Freons
D DDT

Answer:Freons
17 Haloalkanes react with KCN to form__________ as main product, but with AgCN, it form _______ as the chief product.
A alkyl cyanides; isocyanides
B isocyanides; alkyl cyanides
C isocyanides; isocyanides
D alkyl cyanides; alkyl cyanides

Answer:alkyl cyanides; isocyanides
18 In Fittig reaction, aryl halides when treated with ____ in dry ether give an analogous compound in which two aryl groups are joined together.
A Potassium
B Magnesium
C Sodium
D Calcium

Answer:Sodium
19 Of the following, ____________ is not a monohalo-organic compound.
A CH2=CHCl
B CH2=CHCH2Br
C CH2Cl2
D CH3CH2CH2F

Answer: CH2Cl2
20 The metal present in Grignard reagents is___.
A Sodium
B Potassium
C Magnesium
D Calcium

Answer: Magnesium

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