In This Post we are  providing Chapter-10 Haloalkanes and Haloarenes  NCERT MCQ for Class 12 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON HALOALKANES AND HALOARENES

Question 1.
Good conductor of electricity and heat is
(a) Anthracite coke
(b) Diamond
(c) Graphite
(d) Charcoal

Answer: (c) Graphite

Question 2.
In which of the following allotropes of carbon, percentage of carbon is maximum?
(a) Wood charcoal
(b) Coconut charcoal
(c) Graphite
(d) None of these

Answer: (c) Graphite

Question 3.
The hybridization of carbon in diamond is
(a) sp3
(b) sp2
(c) sp
(d) dsp2Answer

Answer: (a) sp3

Question 4.
Organic compound must contain an element
(a) oxygen
(b) carbon
(c) hydrogen
(d) nitrogen

Answer: (b) carbon

Question 5.
Alkene gives which of the following reactions?
(a) Addition reaction
(b) Substitution reaction
(c) Both (a) and (b)
(d) None of these

Answer: (c) Both (a) and (b)

Question 6.
Single bond length between carbon-carbon is
(a) 1.34 Å
(b) 1.20 Å
(c) 1.54 Å
(d) none of these

Answer: (c) 1.54 Å

Question 7.
Valency of carbon is
(a) 1
(b) 2
(c) 3
(d) 4

Answer: (d) 4

Question 8.
Criteria for purity of organic solid is
(a) boiling point
(b) melting point
(c) specific gravity
(d) none of these

Answer: (b) melting point

Question 9.
General formula of Alkene is
(a) CnH2n
(b) CnH2n+2
(c) CnH2n-2
(d) none of these

Answer: (a) CnH2n

Question 10.
Hybridization of carbon in ethane is
(a) sp3
(b) sp2
(c) sp
(d) sp3d2

Answer: (a) sp3

Question 11.
Number of π bonds in ethyne is
(a) 1
(b) 2
(c) 3
(d) 4

Answer: (b) 2

Question 12.
The compound having general formula CnH2n+2 is
(a) Alkene
(b) Alkyne
(c) Alkane
(d) none of these

Answer: (c) Alkane

Question 13.
Which of the following is not correctly matched with its IUPAC name?
(a) CHF2CBrClF : 1-Bromo-1-chIoro-1, 2, 2-trifluoroethane
(b) (CCl3)3CCl : 2-(Trichloromethyl)-1, 1, 2, 3, 3-heptachloropropane
(c) CH3C (p-ClC6H4)2CH(Br)CH3 : 2-Bromo-3, 3-bis (4- chlorophenyl) butane
(d) o-BrC6H4CH (CH3) CH2CH3 : 2-Bromo-l- methylpropylbenzene

Answer: (b) (CCl3)3CCl : 2-(Trichloromethyl)-1, 1, 2, 3, 3-heptachloropropane

Question 14.
The negative part of the addendum (the molecule to be added) adds on the carbon atom of the double bond containing the least number of hydrogen atoms. This rule is known as
(a) Saytzeffs rule
(b) Peroxide rule
(c) Markovnikov’s rule
(d) Van’t Hoff rule

Answer: (c) Markovnikov’s rule

Question 15.
Which of the following compounds can yield only one monochlorinated product upon free radical chlorination?
(a) 2, 2-Dimethylpropane
(b) 2-Methylpropane
(c) 2-Methylbutane
(d) n-Butane

Answer: (a) 2, 2-Dimethylpropane

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