The reduction of 4-octyne with H 2 in the presence of Pd/CaCO 3 – quinoline gives (as a major product) -

a mixture of cis and trans-4-octene

a completely reduced product C 8 H 18

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JEE Exam > JEE Tests > Chemistry for JEE Main & Advanced > Hydrocarbon - 1 - JEE MCQ

Hydrocarbon - 1 - JEE MCQ

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30 Questions MCQ Test Chemistry for JEE Main & Advanced - Hydrocarbon - 1

Hydrocarbon - 1 for JEE 2024 is part of Chemistry for JEE Main & Advanced preparation. The Hydrocarbon - 1 questions and answers have been prepared according to the JEE exam syllabus.The Hydrocarbon - 1 MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Hydrocarbon - 1 below.

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Hydrocarbon - 1 - Question 1

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The compound

product,

here product is

[AIEEE-2002]

A.
B.
C.
CH₃– CH₂ – COOH only
D.

Detailed Solution for Hydrocarbon - 1 - Question 1

The correct answer is option B

Hydrocarbon - 1 - Question 2

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During dehydration of alcohols to alkenes by heating with conc. H2SO4 the initiation step is-

[AIEEE-2003]

A.
Elimination of water
B.
Formation of an easter
C.
Protonation of alcohol molecule
D.
Formation of carbocation

Detailed Solution for Hydrocarbon - 1 - Question 2

Dehydration of alcohol to alkene in presence of concentrated H₂SO₄ involves the –OH group in the alcohol that donates two electrons to H⁺ from the acid reagent, forming an alkyloxonium ion. The deprotonated acid (the nucleophile) then attacks the hydrogen adjacent to the carbocation and form a double bond.

Thus, the initiation step is protonation of alcohol.

The correct option is C.

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Hydrocarbon - 1 - Question 3

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Bottles containing C₆H₅I and C₆H₅CH₂I lost their original labels. They were labelled A and B for testing. A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO₃ and then some AgNO₃ solution was added. Substance B gave a yellow precipitate.
Which one of the following statements is true for this experiment ?

[AIEEE-2003]

A.
B was C₆H₅I
B.
Addition of HNO₃ was unnecessary
C.
A was C₆H₅I
D.
A was C₆H₅CH₂I

Detailed Solution for Hydrocarbon - 1 - Question 3

Hydrocarbon - 1 - Question 4

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The alkene formed as a major product in the above elimination reaction is

[AIEEE 2006]

A.
CH₂= CH₂
B.
C.
D.

Detailed Solution for Hydrocarbon - 1 - Question 4

The given compound is the result of Hofmann Exhaustive Methylation reaction.
According to Hofmann Rule the less substituted alkene is the major product.

Hence CH₂ = CH₂ will be the major product with

Hydrocarbon - 1 - Question 5

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The reacting species of alc. KOH is -

A.
OH¯
B.
OR⁺
C.
OK⁺
D.
RO¯

Detailed Solution for Hydrocarbon - 1 - Question 5

Hydrocarbon - 1 - Question 6

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The no. of isomeric sodium salt that will be required to obtain neopentane.

A.
3
B.
1
C.
4
D.
6

Detailed Solution for Hydrocarbon - 1 - Question 6

Hydrocarbon - 1 - Question 7

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The major product of the following reaction is

A.
a hemiacetal
B.
an acetal
C.
an ether
D.
an ester

Detailed Solution for Hydrocarbon - 1 - Question 7

Hydrocarbon - 1 - Question 8

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Which sodium salt will be heated with sodalime to obtain propane -

Detailed Solution for Hydrocarbon - 1 - Question 8

Hydrocarbon - 1 - Question 9

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During the preparation of ethane by Kolbe's electrolytic method using inert electrode the pH of the electrolyte -

A.
Increases progressively as the reaction proceeds
B.
Decreases progressively as the reaction proceeds
C.
Remains constant throughout the reaction
D.
May decrease as the concentration of the electrolyte is not very high

Detailed Solution for Hydrocarbon - 1 - Question 9

In Kolbe's electrolysis method using electrolytic method using inert electrode the pH of the electrolyte increases progressively as the reaction proceed

Hydrocarbon - 1 - Question 10

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In the above reaction if we take methylene chloride and isopropylidene chloride then products are -

Detailed Solution for Hydrocarbon - 1 - Question 10

Hydrocarbon - 1 - Question 11

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A.
99.4 %, 0.6 %
B.
50 %, 50 %
C.
0.6 %, 99.4 %
D.
80 %, 20 %

Detailed Solution for Hydrocarbon - 1 - Question 11

Hydrocarbon - 1 - Question 12

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Hydrogenation of the above compound in the presence of poisoned pallodium catalyst gives

A.
An optically active compound
B.
An optically inactive compound
C.
A racemic mixture
D.
A diastereomeric mixture

Detailed Solution for Hydrocarbon - 1 - Question 12

Hydrocarbon - 1 - Question 13

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What would be the product when ethene is oxidised with cold dil. KMnO₄ solution -

Detailed Solution for Hydrocarbon - 1 - Question 13

Hydrocarbon - 1 - Question 14

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Detailed Solution for Hydrocarbon - 1 - Question 14

Hydrocarbon - 1 - Question 15

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A.
meso diol
B.
racemic diol
C.
both correct
D.
none is correct

Detailed Solution for Hydrocarbon - 1 - Question 15

Hydrocarbon - 1 - Question 16

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Which one of the following alkenes will react fastest with H₂ under catalytic hydrogenation condition -

Detailed Solution for Hydrocarbon - 1 - Question 16

Hydrocarbon - 1 - Question 17

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A.
A
B.
B
C.
C
D.
D

Detailed Solution for Hydrocarbon - 1 - Question 17

Hydrocarbon - 1 - Question 18

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The reduction of 4-octyne with H₂ in the presence of Pd/CaCO₃ – quinoline gives (as a major product) -

A.
trans-4-octene
B.
cis- 4- octene
C.
a mixture of cis and trans-4-octene
D.
a completely reduced product C₈H₁₈

Detailed Solution for Hydrocarbon - 1 - Question 18

Hydrocarbon - 1 - Question 19

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A.
A is trans, B is cis
B.
A and B both are cis
C.
A and B both are trans
D.
A is cis, B is trans

Detailed Solution for Hydrocarbon - 1 - Question 19

Hydrocarbon - 1 - Question 20

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Detailed Solution for Hydrocarbon - 1 - Question 20

Hydrocarbon - 1 - Question 21

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Anti-Markownikoff’s addition of HBr is not observed in -

A.
Propene
B.
But-2-ene
C.
Butene
D.
Pent-2-ene

Detailed Solution for Hydrocarbon - 1 - Question 21

Anti-Markownikoff’s and markounikoff's both are not applicable in symmetrical alkene. So option (B) is correct.

Hydrocarbon - 1 - Question 22

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1-chlorobutane on reaction with alcoholic potash gives -

A.
1-butene
B.
1-butanol
C.
2-butene
D.
2-butanol

Detailed Solution for Hydrocarbon - 1 - Question 22

Hydrocarbon - 1 - Question 23

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A.
alcoholic KOH and NaNH₂
B.
NaNH₂ and alcoholic KOH
C.
NaNH₂ and Lindlar
D.
Lindlar and NaNH₂

Detailed Solution for Hydrocarbon - 1 - Question 23

NaNH₂ → is use to formation of terminal alkyne.

Hydrocarbon - 1 - Question 24

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Gem dihalide is formed by the reaction of alkyne and -

A.
HX
B.
X₂
C.
H₂
D.
O₂

Detailed Solution for Hydrocarbon - 1 - Question 24

Hydrocarbon - 1 - Question 25

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When propyne is treated with aqueous H₂SO₄ in presence of HgSO₄, the major product is -

A.
propanal
B.
propyl hydrogen sulphate
C.
acetone
D.
propanol

Detailed Solution for Hydrocarbon - 1 - Question 25

Hydrocarbon - 1 - Question 26

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BrCH₂–CH₂–CH₂Br reacts with Na in the presence of ether at 100ºC to produce -

Detailed Solution for Hydrocarbon - 1 - Question 26

Hydrocarbon - 1 - Question 27

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A.
sp - sp²
B.
sp³ - sp³
C.
sp - sp³
D.
sp² - sp³

Detailed Solution for Hydrocarbon - 1 - Question 27

Hydrocarbon - 1 - Question 28

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Detailed Solution for Hydrocarbon - 1 - Question 28

Hydrocarbon - 1 - Question 29

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How much volume of air will be needed for complete combustion of 10 lit. of ethane -

A.
135 lit.
B.
35 lit.
C.
175 lit.
D.
205 lit.

Detailed Solution for Hydrocarbon - 1 - Question 29

Hydrocarbon - 1 - Question 30

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Detailed Solution for Hydrocarbon - 1 - Question 30

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