Important notes for the preparation of jee

Chapter 22

Hydrocarbons

1. The main product of the following reaction is 5. The major organic compound formed by the
reaction of 1, 1, 1-trichloroethane with silver powder
conc.H 2SO 4
C 6H5 CH 2 CH(OH)CH(CH 3 )2   o? is [JEE (Main)-2014]
[AIEEE-2010] (1) Acetylene (2) Ethene

H5C6CH2CH2 (3) 2-Butyne (4) 2-Butene
(1) C = CH2 6. Which of the following compounds will exhibit
H3C geometrical isomerism? [JEE (Main)-2015]
(1) 1 - Phenyl - 2 - butene
H 5C 6 H
(2) 3 - Phenyl - 1 - butene
(2) C=C
H CH(CH 3)2 (3) 2 - Phenyl - 1 - butene
(4) 1, 1 - Diphenyl - 1 propane
C6H5CH2 CH3
7. Which compound would give 5-keto-2-methyl
(3) C=C hexanal upon ozonolysis? [JEE (Main)-2015]
H CH3
CH3 CH3
C6H5 CH(CH3)2
CH3
(4) C=C
(1) (2)
H H
2. One mole of a symmetrical alkene on ozonolysis CH3
gives two moles of an aldehyde having a molecular
mass of 44 u. The alkene [AIEEE-2010] CH3 CH3
(1) Ethane (2) Propene
H3C
(3) 1-butene (4) 2-butene (3) (4)

3. 2–Hexyne gives trans–2–Hexene on treatment with CH3
[AIEEE-2012]
(1) Li/NH3 8. The reaction of propene with HOCl (Cl2 + H2O)
proceeds through the intermediate
(2) Pd/BaSO4 [JEE (Main)-2016]
(3) Li AlH4 (1) CH3 – CH+ – CH2 – Cl
(4) Pt/H2 (2) CH3  CH(OH)  CH2
4. Which branched chain isomer of the hydrocarbon
(3) CH3  CHCl  CH2
with molecular mass 72 u gives only one isomer of
mono substituted alkyl halide? [AIEEE-2012] (4) CH3 – CH+ – CH2 – OH
(1) Neopentane 9. The trans-alkenes are formed by the reduction of
(2) Isohexane alkynes with [JEE (Main)-2018]

(3) Neohexane (1) H2 - Pd/C, BaSO4 (2) NaBH4

(4) Tertiary butyl chloride (3) Na/liq. NH3 (4) Sn - HCl

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,CHEMISTRY ARCHIVE - JEE (Main)

10. The major product of the following reaction is
OH
O (1) (2)
CH3
AlCl3,'
O o
+
(3) (4)
[JEE (Main)-2019]

12. The major product of the following reaction is


CH3O
CH2Cl
(i) AlCl3 (anhyd.)
(1)
(ii) H 2O


[JEE (Main)-2019]

OCH 3
CH3
(1)



CH3O
(2)
(2)




CH3O
(3)



(3) (4) CH3O

CH 3

13. W hich hydrogen in compound (E) is easily
replaceable during bromination reaction in presence
of light?

CH3  CH2  CH CH
G J E D
(E)
(4)
[JEE (Main)-2019]
(1) J-hydrogen
(2) D-hydrogen
11. Which of the following compounds is not aromatic? (3) G-hydrogen
[JEE (Main)-2019] (4) E-hydrogen




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, ARCHIVE - JEE (Main) CHEMISTRY

14. What will be the major product in the following Cl
mononitration reaction?
(2)
O
HNO3
N  o
H Conc.H SO
2 4



Cl
[JEE (Main)-2019] (3)
O NO2
(1)
N
H

(2) O2N HO
O
(4)
N
H

17. Among the following four aromatic compounds,
(3) O which one will have the lowest melting point?
N [JEE (Main)-2019]
H
NO2 O

O OH
(1) (2) OH
(4) O2N N
H O

CH3
15. Which compound(s) out of following is/are not OH
aromatic? O
(3) O
(4)

CH3

18. The major product of the following reaction is
(A) (B) (C) (D) CH3CH2CHCH2 (i) KOH alc.
(ii) NaNH2
[JEE (Main)-2019] Br Br in liq NH3

(1) (B), (C) and (D) (2) (A) and (C) [JEE (Main)-2019]
(3) (C) and (D) (4) (B) (1) CH3CH2C { CH
16. The major product of the following reaction is
(2) CH3CH = CHCH2NH2

(3) CH3CH2CH – CH2
HO
(1) HCl
NH2 NH2
(2) AlCl 3 (Anhyd.)
(4) CH3CH = C = CH2
[JEE (Main)-2019] 19. The major product in the following conversion is
HO
CH3O CH = CH – CH3 HBr (excess)
Heat ?
(1)
[JEE (Main)-2019]

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