Haloalkanes and Haloarenes
185 Questions
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th August Morning Shift
Excess of isobutane on reaction with Br2 in presence of light at 125$^\circ$C gives which one of the following, as the major product?
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th July Morning Shift
The given reaction can occur in the presence of :
(a) Bromine water
(b) Br2 in CS2, 273 K
(c) Br2/FeBr3
(d) Br2 in CHCl3, 273 K
Choose the correct answer from the options gien below :
A.
(b) and (d) only
B.
(a) and (c) only
C.
(b), (c) and (d) only
D.
(a), (b) and (d) only
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Evening Shift
Given below are two statements :
Statement I : C2H5OH and AgCN both can generate nucleophile.
Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions.
Choose the most appropriate option :
Statement I : C2H5OH and AgCN both can generate nucleophile.
Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions.
Choose the most appropriate option :
A.
Statement I is false but statement II is true.
B.
Both statement I and statement II are true.
C.
Both statement I and statement II are false.
D.
Statement I is true but statement II is false.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Evening Shift
Main products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 18th March Morning Shift
Reaction of Grignard reagent, C2H5MgBr with C8H8O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B, C10H13Cl. The Compound B is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Evening Shift
The correct pair(s) of the ambident nucleophiles is(are)
(A) AgCN/KCN
(B) RCOOAg/RCOOK
(C) AgNO2/KNO2
(D) AgI/KI
(A) AgCN/KCN
(B) RCOOAg/RCOOK
(C) AgNO2/KNO2
(D) AgI/KI
A.
(B) and (C) only
B.
(B) only
C.
(A) and (C) only
D.
(A) only
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Morning Shift
The above reaction requires which of the following reaction conditions?
A.
623 K, Cu, 300 atm
B.
623 K, 300 atm
C.
573 K, 300 atm
D.
573 K, Cu, 300 atm
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Morning Shift
Product ''A'' in the above chemical reaction is :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 17th March Morning Shift
Which of the following reaction is an example of ammonolysis?
A.
C6H5COCl + C6H5NH2 $ \to $ C6H5CONHC6H5
B.
C6H5CH2CN $\buildrel {[H]} \over
\longrightarrow $ C6H5CH2CH2NH2
C.
C6H5CH2CN $\buildrel {HCl} \over
\longrightarrow $ C6H5$\mathop N\limits^ + $H3Cl$-$
D.
C6H5CH2Cl + NH3 $ \to $ C6H5CH2NH2
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 16th March Evening Shift
Identify the reagent(s) 'A' and condition(s) for the reaction
A.
A = HCl, ZnCl2
B.
A = HCl; Anhydrous AlCl3
C.
A = Cl2; UV light
D.
A = Cl2; dark, Anhydrous AlCl3
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 16th March Morning Shift
The products ''A'' and ''B'' formed in above reactions are :
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Evening Shift
Match List - I with List - II.
Choose the correct answer from the options given below :
Choose the correct answer from the options given below :
A.
(a) $ \to $ (ii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (iii)
B.
(a) $ \to $ (iii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (ii)
C.
(a) $ \to $ (iii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (ii)
D.
(a) $ \to $ (ii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (iii)
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Morning Shift
For the given reaction
What is 'A'?
What is 'A'?
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 26th February Morning Shift
For the given reaction :
What is 'A'?
What is 'A'?
A.
B.
C.
D.
CH3CH2CH2NH2
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 25th February Morning Shift
Identify A and B in the chemical reaction.
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Morning Shift
What is the major product formed by HI on reaction with
A.
B.
C.
D.
2021
JEE Mains
MCQ
JEE Main 2021 (Online) 24th February Morning Shift
The product formed in the first step of the reaction of
with excess $\mathrm{Mg/Et_2O}$ ($\mathrm{Et=C_2H_5}$) is
with excess $\mathrm{Mg/Et_2O}$ ($\mathrm{Et=C_2H_5}$) is
A.
B.
C.
D.
2021
JEE Mains
Numerical
JEE Main 2021 (Online) 26th August Evening Shift
A chloro compound "A".
(i) forms aldehydes on ozonolysis followed by the hydrolysis.
(ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP.
The number of carbon atoms in a molecule of compound A is ___________.
(i) forms aldehydes on ozonolysis followed by the hydrolysis.
(ii) when vaporized completely 1.53 g of A, gives 448 mL of vapour at STP.
The number of carbon atoms in a molecule of compound A is ___________.
Correct Answer: 3
Explanation:
448 ml of A $\Rightarrow$ 1.53 gm A
22400 ml of A $\Rightarrow$ ${{1.53} \over {448}}$ $\times$ 22400 gm A = 76.5 Agm
$\mathop {{H_3}CHC - CH - Cl}\limits_{It\,has\,3\,carbon\,atoms} \mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Zn/{H_2}O}^{{O_3}}} \mathop {C{H_3} - CH = O}\limits_{Aldehyde} $
& MM is 36 + 5 + 35.5 = 76.5
22400 ml of A $\Rightarrow$ ${{1.53} \over {448}}$ $\times$ 22400 gm A = 76.5 Agm
$\mathop {{H_3}CHC - CH - Cl}\limits_{It\,has\,3\,carbon\,atoms} \mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Zn/{H_2}O}^{{O_3}}} \mathop {C{H_3} - CH = O}\limits_{Aldehyde} $
& MM is 36 + 5 + 35.5 = 76.5
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 6th September Evening Slot
The increasing order of the boiling points of
the major products A, B and C of the following
reactions will be :
A.
A < C < B
B.
C < A < B
C.
B < C < A
D.
A < B < C
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 5th September Evening Slot
The major product formed in the following reaction is :
CH3CH = CHCH(CH3)2 $\buildrel {HBr} \over \longrightarrow $
CH3CH = CHCH(CH3)2 $\buildrel {HBr} \over \longrightarrow $
A.
Br(CH2)3CH(CH3)2
B.
CH3CH(Br)CH2CH(CH3)2
C.
CH3CH2CH(Br)CH(CH3)2
D.
CH3CH2CH2C(Br)(CH3)2
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Evening Slot
Among the following compounds, which one
has the shortest C – Cl bond?
A.
H3C - Cl
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Evening Slot
Which of the following compounds will form the
precipitate with aq. AgNO3 solution most
readily?
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 4th September Morning Slot
The decreasing order of reactivity of the
following organic molecules towards AgNO3
solution is :
A.
(B) > (A) > (C) > (D)
B.
(A) > (B) > (C) > (D)
C.
(A) > (B) > (D) > (C)
D.
(C) > (D) > (A) > (B)
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Evening Slot
The decreasing order of reactivity of the
following compounds towards nucleophilic
substitution (SN2) is :
A.
(IV) > (II) > (III) > (I)
B.
(II) > (III) > (IV) > (I)
C.
(II) > (III) > (I) > (IV)
D.
(III) > (II) > (IV) > (I)
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Evening Slot
The major product in the following reaction is :
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 3rd September Morning Slot
The mechanism of SN1 reaction is given as :
A student writes general characteristics based on the given mechanism as :
(a) The reaction is favoured by weak nucleophiles.
(b) R+ would be easily formed if the substituents are bulky.
(c) The reaction is accompanied by racemization.
(d) The reaction is favoured by non-polar solvents.
A student writes general characteristics based on the given mechanism as :
(a) The reaction is favoured by weak nucleophiles.
(b) R+ would be easily formed if the substituents are bulky.
(c) The reaction is accompanied by racemization.
(d) The reaction is favoured by non-polar solvents.
A.
(a) and (b)
B.
(a), (b) and (c)
C.
(a) and (c)
D.
(b) and (d)
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
The major product obtained from
E2 - elimination of 3-bromo-2-fluoropentane is
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Evening Slot
Consider the reaction sequence given below:
Which of the following statements is true?
Which of the following statements is true?
A.
Changing the concentration of base will
have no effect on reaction (1)
B.
Changing the concentration of base will
have no effect on reaction (2)
C.
Changing the base from OH- to -OR will
have no effect on reaction (2)
D.
Doubling the concentration of base will
double the rate of both the reactions
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 2nd September Morning Slot
Which of the following compunds will show
retention in configuration on nucleophilic
substitution by OH– ion?
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 9th January Evening Slot
Which of the following reactions will not
produce a racemic product?
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 9th January Morning Slot
Which of these will produce the highest yield
in Friedel Crafts reaction?
A.
B.
C.
D.
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 8th January Morning Slot
The decreasing order of reactivity towards dehydrohalogenation (E1) reaction of the following compounds is :
A.
B $>$ D $>$ A $>$ C
B.
D $>$ B $>$ C $>$ A
C.
B $>$ A $>$ D $>$ C
D.
B $>$ D $>$ C $>$ A
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 7th January Evening Slot
Consider the following reactions :
Which of these reactions are possible ?
Which of these reactions are possible ?
A.
(b), (c) and (d)
B.
(a) and (b)
C.
(a) and (d)
D.
(b) and (d)
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 7th January Evening Slot
For the following reactions
Ks and Ke, are respectively, the rate constants for substitution and elimination and $\mu = {{{k_s}} \over {{k_e}}}$ the correct options is
Ks and Ke, are respectively, the rate constants for substitution and elimination and $\mu = {{{k_s}} \over {{k_e}}}$ the correct options is
A.
${\mu _B} > {\mu _A}$ and Ke(A) > Ke(B)
B.
${\mu _A} > {\mu _B}$ and Ke(B) > Ke(A)
C.
${\mu _B} > {\mu _A}$ and Ke(B) > Ke(A)
D.
${\mu _A} > {\mu _B}$ and Ke(A) > Ke(B)
2020
JEE Mains
MCQ
JEE Main 2020 (Online) 7th January Morning Slot
1- methyl ethylene oxide when treated with an excess of HBr produces :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Evening Slot
Which one of the following is likely to give a precipitate with AgNO3 solution ?
A.
CHCl3
B.
(CH3)3CCl
C.
CCl4
D.
CH2=CH–Cl
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Evening Slot
An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options :
Assertion (A) : Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R) : Even though the intermediate carbocation is stabilized by loosely held p-electrons, the cleavage is difficult because of strong bonding.
Assertion (A) : Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R) : Even though the intermediate carbocation is stabilized by loosely held p-electrons, the cleavage is difficult because of strong bonding.
A.
Both (A) and (R) are correct statements but (R) is not the correct explanation of (A)
B.
Both (A) and (R) are correct statements and (R) is the correct explanation of (A)
C.
(A) is correct statement but (R) is a wrong statement
D.
Both (A) and (R) are wrong statements.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th April Evening Slot
Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives X as the major product. Reaction of X with
Hg(OAc)2/H2O followed by NaBH4 gives Y as the major product. Y is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Evening Slot
The major product 'Y' in the following reactions is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Evening Slot
The major product obtained in the given reaction is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Morning Slot
Increasing rate of SN1 reaction in the following compounds is :
A.
(B) < (A) < (D) < (C)
B.
(A) < (B) < (C) < (D)
C.
(A) < (B) < (D) < (C)
D.
(B) < (A) < (C) < (D)
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th April Morning Slot
The major product of the following reaction is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 8th April Evening Slot
Which one of the following alkenes when
treated with HCl yields majorly an anti
Markovnikov product?
A.
Cl – CH = CH2
B.
F3C – CH = CH2
C.
CH3O – CH = CH2
D.
H2N – CH = CH2
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 8th April Evening Slot
The major product in the following reaction is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 8th April Evening Slot
The major product of the following reaction is:
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 12th January Evening Slot
The major product in the following conversion is –
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 11th January Evening Slot
Which of the following compounds will produce a precipitate with AgNO3 ?
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 10th January Morning Slot
Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?
A.
$\beta $ $-$ hydrogen
B.
$\alpha $ $-$ hydrogen
C.
$\gamma $ $-$ hydrogen
D.
$\delta $ $-$ hydrogen
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Morning Slot
The major product of the following reaction is :
A.
B.
C.
D.
2019
JEE Mains
MCQ
JEE Main 2019 (Online) 9th January Morning Slot
The compounds A and B in the following reaction are, respectively :
A.
A = Benzyl alcohol, B = Benzyl cyanide
B.
A = Benzyl chloride, B = Benzyl cyanide
C.
A = Benzyl alcohol, B = Benzyl isocyanide
D.
A = Benzyl chloride, B = Benzyl isocyanide
