Haloalkanes and Haloarenes Class 12 MCQ. We covered all the Haloalkanes and Haloarenes Class 12 MCQ in this post for free so that you can practice well for the exam.
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MCQ on Haloalkanes and Haloarenes for NEET Students
Which of the following is an isomer of neopentyl bromide?
(A) 2-Bromo-2-methyl butane
(B) 1-Bromo-2-methylpropane
(C) 2-Bromo-2-methylpropane
(D) 3-Bromo-2-methyl pentane
Option a – 2-Bromo-2-methyl butane
Assertion: Allyl chloride undergoes hydrolysis more readily than n-propyl chloride. Reason: Allyl chloride on hydrolysis gives resonance stabilized carbocation while no resonance is observed in the carbocation formed by n-propyl chloride.
(A) Assertion and Reason are true. The reason is the correct explanation of the Assertion.
(B) Assertion and Reason are true. The reason is not the correct explanation of the Assertion.
(C) The assertion is true, and the Reason is false.
(D) The assertion is false, Reason is true.
Option a – Assertion and Reason are true. The reason is the correct explanation of the Assertion.
The number of secondary alkyl halides possible for C₂H₂X is ……..
(A) 0
(B) 1
(C) 2
(D) 3
Option b – 1
Which of the following statement is CORRECT for SNl reaction?
(A) The rate of SNl reaction depends on the concentration of alkyl halide.
(B) The rate of SNl reaction depends on the concentration of nucleophiles.
(C) SNl reactions of alkyl halides are favored by non-polar solvents.
(D) SNI reactions follow second-order kinetics.
Option a – The rate of SNl reaction depends on the concentration of alkyl halide.
The major and minor products obtained by the addition of HBr to hex-1-ene in presence of peroxide are ………. respectively.
(A) 2-bromohexane and 1-bromohexane
(B) 1-bromohexane and 2-bromohexane
(C) 1,2-dibromohexane and 2-bromohexane
(D) 2,2-dibromohexane and 3-bromohexane
Option b – 1-bromohexane and 2-bromohexane
Compound ‘P’ is a 3° mono halogen derivative of an alkane having formula C4H10. This compound ‘P’ on dehydrohalogenation reaction forms ……….
(A) but-1-ene
(B) 2-methylbut-1-ene
(C) 2-methylpropene
(D) but-2-ene
Option c – 2-methylpropene
Toluene on treatment with chlorine in presence of ferric chloride as a catalyst undergoes what type of reaction?
(A) Electrophilic substitution
(B) Electrophilic addition
(C) Nucleophilic substitution
(D) Nucleophilic addition
Option a – Electrophilic substitution
Arrange the following compounds in increasing order of their boiling points. (a) 1-Iodo-2-methylpropane (b) 1-Iodobutane (c) 2-Iodo-2-methylpropane
(A) (b)<(a) < (c)
(B) (a) <(b) < (c)
(C) (c) <(a) < (b)
(D) (c) <(b) < (a)
Option c – (c)
In assigning R, S configuration, which among the following groups has the highest priority?
(A) -COOCH3
(B) -COOH
(C) -CHO
(D) -CH₂OH
Option a – -COOCH3
Which of the following is the CORRECT statement?
(A) The C-CI bond in chlorobenzene is longer than the C-Cl bond in chloromethane.
(B) The C-Cl bond in chlorobenzene is stronger than the C-Cl bond in chloromethane.
(C) The C-CI bond in chlorobenzene has a triple bond character.
(D) The C-CI bond in chloromethane has a double bond character.
Option b – The C-Cl bond in chlorobenzene is stronger than the C-Cl bond in chloromethane.
Which of the following is allylic halide?
(A) Benzyl bromide
(B) 1-Bromo-1-phenylethane
(C) 1-Bromobenzene
(D) 3-Bromocyclohex-1-ene
Option d – 3-Bromocyclohex-1-ene
Ethanol is refluxed with PC15 to form an organic compound (X), which can also be obtained by ……..
(A) the action of HCl in presence of ZnCl₂ on ethanol
(B) the action of HCl on propene
(C) heating ethanol in presence of 95 % H₂SO4
(D) the reaction of CH3MgCl and methanol in presence of dry ether followed by hydrolysis
Option a – the action of HCl in presence of ZnCl₂ on ethanol
Chlorobenzene on heating with anhydrous copper cyanide and sodium cyanide at 473 K under pressure gives………
(A) cyanobenzene
(B) nitrobenzene
(C) benzene
(D) aniline
Option a – cyanobenzene
Which of the following is a tertiary alkyl halide?
(A) 2-Bromo-3-methyl butane
(B) 2-Bromo-2-methyl butane
(C) 1-Bromo-2-methyl butane
(D) 1-Bromo-2,2-dimethylpropane
Option b – 2-Bromo-2-methyl butane
Which of the following can be used to convert bromoethane to propane nitrile?
(A) Moist silver oxide
(B) Alcoholic solution of potassium cyanide
(C) Alcoholic solution of ammonia
(D) Silver cyanide
Option b – Alcoholic solution of potassium cyanide
1-Phenyl-2-chlorobutane, on heating with alcoholic KOH, gives mainly ………
(A) 1-phenylbut-1-ene
(B) 3-phenylpropene
(C) 1-phenylbutan-2-ol
(D) 3-phenylbutan-1-ol
Option a – 1-phenylbut-1-ene
How many chiral compounds are possible on monochlorination of 2-methyl butane?
(A) 2
(B) 4
(C) 6
(D) 8
Option a – 2
Which of the following is INCORRECT about DDT?
(A) It is a polyhalogen compound.
(B) It is toxic and creates ecological problems.
(C) It has two aromatic rings in its structure.
(D) It contains six chlorine atoms in its structure.
Option d – It contains six chlorine atoms in its structure.
Which of the following reaction can be used to convert chlorobenzene to 4-chloroacetophenone in a single step?
(A) Fittig reaction
(B) Friedel Craft’s reaction
(C) Nitration
(D) Sandmeyer’s reaction
Option b – Friedel Craft’s reaction
Choose the CORRECT statement(s) from the following: The C-X bond length is longer in bromomethane as compared to fluoromethane. (II) The C-X bond enthalpy (in kJ/mol) is higher in bromomethane as compared to fluoromethane. (III) The dipole moment of bromomethane has a higher value as compared to fluoromethane.
(A) Only (I)
(B) Only (II)
(C) (I) and (II)
(D) (II) and (III)
Option a – Only (I)
When alcohols are refluxed with thionyl chloride, the byproduct(s) formed is/are ………
(A) H3PO3
(B) HCl + POCI3
(C) HCl+SO₂
(D) H₂O + SO₂
Option c – HCl+SO₂
Which of the following is an example of vic-dihalide?
(A) Dichloromethane
(B) 1,2-Dichloroethane
(C) 1,1-Dichloropropane
(D) 1,3-Dichlorobenzene
Option b – 1,2-Dichloroethane
3-Methylpent-2-ene on reaction with HBr in absence of peroxide forms an addition product The number of possible stereoisomers for the product is ………
(A) six
(B) zero
(C) two
(D) four
Option b – zero
In which of the following reaction, the product formed is a chiral molecule?
(A) H₂C=CH₂ + HI ->
(B) CH3 -CH=CH₂ + HBr ->
(C) (CH3)3C- OH + HCI ->
(D) CH3CH₂CH(OH)CH3 + HBr ->
Option d – CH3CH₂CH(OH)CH3 + HBr ->
Which of the following is an INCORRECT statement?
(A) Reactions of alkanes with fluorine are explosive.
(B) The peroxide effect is also known as the Kharasch effect.
(C) Swarts reaction is carried out in presence of metallic fluorides.
(D) Finkelstein reaction is used to prepare alkyl fluorides.
Option d – Finkelstein reaction is used to prepare alkyl fluorides.
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