Download App

Chemistry M.C.Q (1 Marks)

PART - 2 CH - 9 Hydrocarbons · Gujarat Board (GSEB) STD 11 Science (GSEB - English Medium). 24 questions.

Questions

M.C.Q (1 Marks)

Take a timed test

24 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Propene and propyne can be differentiated by :
  • A
    Conc. $H _2 SO _4$
  • B
    $By Br _2$ and $CCl _4$
  • ✓
    $By AgNO _3$ and $NH _4 OH$
  • D
    By Ozone
Answer
Correct option: C.
$By AgNO _3$ and $NH _4 OH$
(C )
View full question & answer→
MCQ 21 Mark
The alkene which give only $CH _3 CHO$ after ozonolysis and hydrolysis is :
  • A
    ethene
  • B
    propene
  • C
    but-1-ene
  • ✓
    but-2-ene
Answer
Correct option: D.
but-2-ene
(D)
View full question & answer→
MCQ 31 Mark
The ethylene molecule have :
  • A
    $4 \sigma$ and $4 \pi$ bond
  • B
    $5 \sigma$ and $3 \pi$ bond
  • ✓
    $5 \sigma$ and $1 \pi$ bond
  • D
    $5 \sigma$ and $2 \pi$ bond
Answer
Correct option: C.
$5 \sigma$ and $1 \pi$ bond
(C )
View full question & answer→
MCQ 41 Mark
An alkane has molecular mass 72 on its chlorination only 1 -monochloro derivative is formed. The alkane is :
  • A
    n-pentane
  • ✓
    Neopentane
  • C
    isopentane
  • D
    butane
Answer
Correct option: B.
Neopentane
(B)
View full question & answer→
MCQ 51 Mark
Which of the following alkane give four isomeric monochloroalkane on halogenation?
  • A
    n-butane
  • B
    Isobutane
  • C
    n-pentane
  • ✓
    Isopentane
Answer
Correct option: D.
Isopentane
(D)
View full question & answer→
MCQ 71 Mark
The maximum number of possible position isomers of $C _5 H _{12}$ is :
  • A
    2
  • ✓
    3
  • C
    4
  • D
    5
Answer
Correct option: B.
3
(B)
View full question & answer→
MCQ 81 Mark
Bayer's reagent is :
  • A
    $HgSO _4$ and $H _2 SO _4$
  • ✓
    Dilute aqueous solution of $KMnO _4$
  • C
    $1 \%$ alkaline solution of $K _2 Cr _2 O _7$
  • D
    Aqueous solution of $H _2 O _2$
Answer
Correct option: B.
Dilute aqueous solution of $KMnO _4$
(B)
View full question & answer→
MCQ 91 Mark
Compounds after ozonolysis followed by hydrolysis are :
  • A
    Alcohol
  • ✓
    Aldehyde and Ketone
  • C
    Carboxylic acid
  • D
    Ester
Answer
Correct option: B.
Aldehyde and Ketone
(B)
View full question & answer→
MCQ 101 Mark
The conversion of normal-butane to iso-butane is known as :
  • A
    Substitution
  • B
    Pyrolysis
  • ✓
    Isomerisation
  • D
    Hydrogenation
Answer
Correct option: C.
Isomerisation
(C )
View full question & answer→
MCQ 111 Mark
Clemmensen reductant is :
  • A
    $LiAIH _4$
  • B
    $NaBH _4$
  • C
    Na and $C _2 H _5 OH$
  • ✓
    $Zn / Hg$ and Conc. HCl
Answer
Correct option: D.
$Zn / Hg$ and Conc. HCl
(D)
View full question & answer→
MCQ 121 Mark
The hydrogenation of alkene and alkyne in presence of Ni catalyst is known as :
  • A
    Rosenmund's reduction
  • B
    Clemmensen reduction
  • ✓
    Sabatey-Sendrens reaction
  • D
    Wolf-Kishner reduction
Answer
Correct option: C.
Sabatey-Sendrens reaction
(C )
View full question & answer→
MCQ 131 Mark
Which of the following carbide gives alkane on hydrolysis :
  • A
    $CaC _2$
  • B
    $Fe _2 C _3$
  • ✓
    $Al _4 C _3$
  • D
    All of these
Answer
Correct option: C.
$Al _4 C _3$
(C )
View full question & answer→
MCQ 141 Mark
Name the product obtained by hydrolysis of methyl magnesium bromide :
  • ✓
    Methane
  • B
    Ethane
  • C
    Propane
  • D
    Butane
Answer
Correct option: A.
Methane
(A)
View full question & answer→
MCQ 151 Mark
Which of the following give pentane on decarboxylation?
  • A
    Hexanoic acid
  • B
    2-methylpentanoic acid
  • C
    2-ethylbutanoic acid
  • ✓
    All of the above
Answer
Correct option: D.
All of the above
(D)
View full question & answer→
MCQ 161 Mark
The compound formed by electrolysis of potassium propionate is :
  • A
    Methane
  • B
    Ethane
  • C
    Propane
  • ✓
    Butane
Answer
Correct option: D.
Butane
(D)
View full question & answer→
MCQ 171 Mark
The general formula of alkane series is :
  • ✓
    $C _n H _{2 n+2}$
  • B
    $C _n H _{2 n}$
  • C
    $C _n H _{2 n-2}$
  • D
    $C _n H _{2 n-4}$
Answer
Correct option: A.
$C _n H _{2 n+2}$
(A)
View full question & answer→
MCQ 181 Mark
Reaction $C _{10} H _{22} \xrightarrow[\Delta]{973 K} C _4 H _8+ C _6 H _{14}$ is known as :
  • ✓
    Pyrolysis
  • B
    Isomerisation
  • C
    Hydrogenation
  • D
    Aromatization
Answer
Correct option: A.
Pyrolysis
(A)
View full question & answer→
MCQ 191 Mark
The chlorination of alkane is :
  • ✓
    Free radical substitution reaction
  • B
    Electrophilic addition reaction
  • C
    Nucleophilic substitution reaction
  • D
    Nucleophilic addition reaction
Answer
Correct option: A.
Free radical substitution reaction
(A)
View full question & answer→
MCQ 201 Mark
Compound having high boiling point is :
  • ✓
    n-hexane
  • B
    n-pentane
  • C
    2-methylbutane
  • D
    2, 3-dimethylpropane
Answer
Correct option: A.
n-hexane
(A)
View full question & answer→
MCQ 211 Mark
Which isomerism is possessed by ethane?
  • A
    Chain
  • B
    Position
  • ✓
    Conformation
  • D
    Metamerism
Answer
Correct option: C.
Conformation
(C )
View full question & answer→
MCQ 221 Mark
Which of the following gas cannot be formed by Kolbe's electrolysis?
  • ✓
    Methane
  • B
    Ethane
  • C
    Propane
  • D
    n-butane
Answer
Correct option: A.
Methane
(A)
View full question & answer→
MCQ 231 Mark
The formation of alkane from halo-alkane from sodium in presence of dry ether is called :
  • A
    Kolbe's reaction
  • ✓
    Wurtz reaction
  • C
    Corey-House synthesis
  • D
    Schmitt reaction
Answer
Correct option: B.
Wurtz reaction
(B)
View full question & answer→
MCQ 241 Mark
What is the main component of the gas obtained from marshy areas?
  • ✓
    $CH _4$
  • B
    $C _2 H _6$
  • C
    $C _2 H _4$
  • D
    $C _2 H _2$
Answer
Correct option: A.
$CH _4$
A
View full question & answer→
Generate Paper FreeAll PART - 2 CH - 9 Hydrocarbons topics