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MCQ Questions Class 12 Haloalkanes and Haloarenes with Answers - Set - 1
Question 1:
Which one is most reactive towards SN1 reaction?
(a) C6H5CH(C6H5)Br
(b) C6H5CH(CH3)Br
(c) C6H5C(CH3)(C6H5)Br
(d) C6H5CH2Br
Correct Answer – (C)
Question 2:
In an SN1 reaction on chiral centres, there is
(a) inversion more than retention leading to partial racemisation
(b) 100% retention
(c) 100% inversion
(d) 100% racemisation
Correct Answer – (A)
Question 3:
Consider the reaction, CH3CH2CH2Br + NaCN →CH3CH2CH2CN + NaBr
This reaction will be the fastest in
(a) ethanol
(b) methanol
(c) N, N -dimethylformamide (DMF)
(d) water.
Correct Answer – (C)
Question 4:
The compound A on treatment with Na gives B, and with PCl5 gives C. B and C react together to give diethyl ether. A, B and C are in the order
(a) C2H5OH, C2H6, C2H5Cl
(b) C2H5OH, C2H5Cl, C2H5 ONa
(c) C2H5Cl, C2H6, C2H5 OH
(d) C2H5OH, C2H5ONa, C2H5 Cl
Correct Answer – (D)
Question 5:
When chlorine is passed through propene at 400°C,which of the following is formed?
(a) PVC
(b) Allyl chloride
(c) Propyl chloride
(d) 1, 2-Dichloroethane
Correct Answer – (B)
MCQ Questions Class 12 Haloalkanes and Haloarenes With Answers
Question 6:
Which of the following acids does not exhibit optical isomerism?
(a) Maleic acid
(b) a-Amino acids
(c) Lactic acid
(d) Tartaric acid
Correct Answer – (A)
Question 7:
Two possible stereo-structures of CH3CHOHCOOH,which are optically active, are called
(a) atropisomers
(b) enantiomers
(c) mesomers
(d) diastereomers
Correct Answer – (B)
Question 8:
The compound C7H8 undergoes the following reactions :
The product C is
(a) m-bromotoluene
(b) o-bromotoluene
(c) 3-bromo-2,4,6-trichlorotoluene
(d) p-bromotoluene.
Correct Answer – (A)
Question 9:
Elimination reaction of 2-bromopentane to form pent-2-ene is
(I) b-Elimination reaction
(II) Follows Zaitsev rule
(III) Dehydrohalogenation reaction
(IV) Dehydration reaction
(a) (I), (II), (III)
(b) (I), (III), (IV)
(c) (II), (III), (IV)
(d) (I), (II), (IV)
Correct Answer – (A)
Question 10:
The reaction of C6H5CH CHCH3 with HBr produces
(a) C6H5CH2CH2CH2Br
The reaction will be most favourable if M happens to be
(a) Na
(b) K
(c) Rb
(d) Li
Correct Answer – (C)
- NCERT Solutions Class 11 Chemistry Chapter 1 : Some Basic Concepts of Chemistry
- NCERT Solutions Class 11 Chemistry Chapter 2 : Structure Of The Atom
- NCERT Solutions Class 11 Chemistry Chapter 3 : Classification of Elements and Periodicity in Properties
- NCERT Solutions Class 11 Chemistry Chapter 4 : Chemical Bonding and Molecular Structure
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- NCERT Solutions Class 11 Chemistry Chapter 7 : Equilibrium
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