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Chemistry M.C.Q (1 Marks)

Alcohols, Phenols and Ethers · CBSE STD 12 Science (CBSE - English Medium). 39 questions.

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M.C.Q (1 Marks)

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39 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Which is the correct increasing order of boiling points of the following compounds- $CH _3 OCH _3$, $CH _3 CH _2 OH$ and $CH _3 CH _2 CH _3$.
  • A
    $CH _3 CH _2 OH < CH _3 OCH _3< CH _3 CH _2 CH _3$
  • B
    $CH _3 CH _2 OH < CH _3 CH _2 CH _3< CH _3 OCH _3$
  • ✓
    $CH _3 CH _2 CH _3< CH _3 OCH _3< CH _3 CH _2 OH$
  • D
    $CH _3 CH _2 CH _3< CH _3 CH _2 OH < CH _3 OCH _3$
Answer
Correct option: C.
$CH _3 CH _2 CH _3< CH _3 OCH _3< CH _3 CH _2 OH$
c
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MCQ 21 Mark
Which of the following is by-product in the reaction of obtaining phenol from cumene?
  • A
    Tribromophenol
  • B
    Banoquinone
  • C
    Picric acid
  • ✓
    Acetone
Answer
Correct option: D.
Acetone
d
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MCQ 31 Mark
Which of the following reaction is possible?
  • ✓

    Image
  • B

    Image
  • C
    Both (A) and (B)
  • D
    Neither (A) nor (B)
Answer
Correct option: A.

Image
a
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MCQ 41 Mark
Some reactions have been given for ether. Which of the following is not correct?
  • A

    Image
  • B

    Image
  • C

    Image
  • ✓

    Image
Answer
Correct option: D.

Image
d
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MCQ 51 Mark
Benzene can be obtained by heating either benzoic acid with X or phenol with Y. X and Y respectively are:
  • A
    Zinc dust and soda lime
  • ✓
    Soda lime and zinc dust
  • C
    Zinc dust and NaOH
  • D
    Soda lime and copper
Answer
Correct option: B.
Soda lime and zinc dust
b
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MCQ 71 Mark
ortho-nitrophenol is less soluble in water than $p$-and $m$-nitrophenols because :
  • A
    o-nitrophenol is more steam volatile than $m$ - and $p$-isomers
  • B
    o-nitrophenol shows intermolecular H-bonding
  • ✓
    o-nitrophenol shows intramolecular H -bonding
  • D
    Melting point of o-nitrophenol is less than those of $m$ - and $p$-isomers
Answer
Correct option: C.
o-nitrophenol shows intramolecular H -bonding
c
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MCQ 81 Mark
Primary, secondary and tertiary alcohols can be differentiated by :
  • A
    Reimer-Tiemann Reaction
  • B
    Tollens reagent
  • ✓
    Lucas reagent
  • D
    Lassaigne's Test
Answer
Correct option: C.
Lucas reagent
c
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MCQ 91 Mark
Which of the following alcohol has maximum solubility in water :
  • A
    Isobutyl alcohol
  • ✓
    Tertiary butyl alcohol
  • C
    Secondary butyl alcohol
  • D
    $n$-Butyl alcohol
Answer
Correct option: B.
Tertiary butyl alcohol
b
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MCQ 101 Mark
Image
In the above reaction which of the following electrophile attacking the benzene ring :
  • A
    $\stackrel{+}{ C } HO$
  • B
    $\stackrel{+}{ C } HCl _2$
  • ✓
    $: CCl _2$
  • D
    $\stackrel{+}{ C } Cl _3$
Answer
Correct option: C.
$: CCl _2$
c
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MCQ 111 Mark
The major product obtained on interaction of phenol with NaOH and $CO _2$ is :
  • A

    Image
  • ✓

    Image
  • C

    Image
  • D

    Image
Answer
Correct option: B.

Image
b
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MCQ 121 Mark
How many structural isomers are possible with the molecular formula $C _4 H _{10} O$ :
  • A
    4
  • ✓
    7
  • C
    6
  • D
    5
Answer
Correct option: B.
7
b
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MCQ 131 Mark
How many primary alcohols are possible with the molecular formula $C _5 H _{11}- OH$ ?
  • ✓
    4
  • B
    3
  • C
    5
  • D
    6
Answer
Correct option: A.
4
a
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MCQ 141 Mark
The IUPAC name ofImage
  • ✓
    3, 3-Dimethyl cyclohexan-l-ol
  • B
    1, 1-Dimethyl-3-hydroxy cyclohexane
  • C
    1, 1-Dimethyl-3-cyclohexanol
  • D
    3, 3-Dimethyl-1-hydroxy cyclohexane
Answer
Correct option: A.
3, 3-Dimethyl cyclohexan-l-ol
a
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MCQ 151 Mark
Which of the following compounds react with $NaHCO _3$ :
  • A
    $CH _3 OH$
  • B

    Image
  • ✓
    $CH _3 COOH$
  • D
    All of these
Answer
Correct option: C.
$CH _3 COOH$
c
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MCQ 161 Mark
Which of the following is a mixed ether?
  • A
    $CH _3- O - CH _3$
  • ✓
    $CH _3- O - CH _2- CH _3$
  • C
    $C _2 H _5- O - C _2 H _5$
  • D
    All of these
Answer
Correct option: B.
$CH _3- O - CH _2- CH _3$
b
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MCQ 171 Mark
When the vapours of tertiary alcohol are passed through heated Cu or ZnO at 573 K , the product obtained is :
  • A
    Ketone
  • B
    Aldehyde
  • ✓
    Alkene
  • D
    Acid
Answer
Correct option: C.
Alkene
c
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MCQ 181 Mark
Which of the following groups will increase the acidic character of phenol :
  • A
    $- CH _3$
  • B
    $- OCH _3$
  • ✓
    $- NO _2$
  • D
    - OH
Answer
Correct option: C.
$- NO _2$
c
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MCQ 201 Mark
Which enzyme is used for the fermentation of sugar to glucose and fructose :
  • A
    Zymase
  • ✓
    Invertase
  • C
    Maltase
  • D
    All of these
Answer
Correct option: B.
Invertase
b
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MCQ 211 Mark
When phenol is heated with zinc dust, the product formed is:
  • A
    Toluene
  • ✓
    Benzene
  • C
    Nitrobenzene
  • D
    Aniline
Answer
Correct option: B.
Benzene
b
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MCQ 221 Mark
In electrophilic substitution -OH group of phenol is :
  • A
    $m$-directing
  • B
    $p$-directing
  • ✓
    o and p-directing
  • D
    o-directing
Answer
Correct option: C.
o and p-directing
c
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MCQ 231 Mark
The compound formed by the acetylation of salicylic acid is
  • A
    Salol
  • ✓
    Aspirin
  • C
    Picric acid
  • D
    Paracetamol
Answer
Correct option: B.
Aspirin
b
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MCQ 241 Mark
Which of the following alcohol has the maximum tendency to give hydrogen ions:
  • A

    Image
  • ✓

    Image
  • C

    Image
  • D

    Image
Answer
Correct option: B.

Image
b
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MCQ 251 Mark
What is formed when a ketone is reduced?
  • A
    Primary alcohol
  • ✓
    Secondary alcohol
  • C
    Tertiary alcohol
  • D
    Phenol
Answer
Correct option: B.
Secondary alcohol
b
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MCQ 281 Mark
What is the functional isomer of l-methoxy propane :
  • ✓
    Butan-l-ol
  • B
    Propan-l-ol
  • C
    Butanal
  • D
    Butanone
Answer
Correct option: A.
Butan-l-ol
a
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MCQ 291 Mark
Which of the following isomerism does not found in ethers :
  • A
    Chain
  • B
    Optical
  • ✓
    Geometric
  • D
    Position
Answer
Correct option: C.
Geometric
c
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MCQ 301 Mark
The IUPAC name of Image
  • A
    2-Methoxy propane
  • B
    Methoxy methyl ethane
  • ✓
    2-Methoxy propane
  • D
    Isopropyl methyl ether
Answer
Correct option: C.
2-Methoxy propane
c
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MCQ 311 Mark
Which of the following compound is soluble in water :
  • A
    $CHCl _3$
  • B
    $C _2 H _5- O - C _2 H _5$
  • C
    $CCl _4$
  • ✓
    $CH _3- CH _2- OH$
Answer
Correct option: D.
$CH _3- CH _2- OH$
d
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MCQ 321 Mark
Which of the following can react with alcohols to form esters :
  • A
    RCOOH
  • B
    RCOCl
  • C
    $( RCO ) O _2$
  • ✓
    All of these
Answer
Correct option: D.
All of these
d
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MCQ 331 Mark
The compound obtained by heating ethanol with conc. $H _2 SO _4$ at 443 K temperature is :
  • A
    Ether
  • B
    Ethyl hydrogen sulphate
  • ✓
    Ethene
  • D
    Propene
Answer
Correct option: C.
Ethene
c
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MCQ 341 Mark
$C _2 H _5 MgCl + CH _3 CHO \longrightarrow$ (addition product) $\xrightarrow{ H _2 O / H ^{+}} y$.
The compound $y$ obtained from the above reaction is :
  • A
    Butan-1-ol
  • ✓
    Butan-2-ol
  • C
    2-Methyl-butan-2-ol
  • D
    2-Methyl-butan-1-ol
Answer
Correct option: B.
Butan-2-ol
b
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MCQ 351 Mark
The general formula of monohydric alcohol is :
  • A
    $C _n H _{2 n+1} O _2$
  • B
    $C _n H _{2 n+2} OH$
  • ✓
    $C _n H _{2 n+2}$
  • D
    $C _n H _{2 n} OH$
Answer
Correct option: C.
$C _n H _{2 n+2}$
c
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MCQ 361 Mark
What is the name of reaction, when phenol is heated with alcoholic KOH and $CHCl _3$ :
  • A
    Diazotization
  • B
    Rosenmund's reaction
  • ✓
    Formylation
  • D
    Carboxylation
Answer
Correct option: C.
Formylation
c
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MCQ 371 Mark
Excess of ethanol when heated with conc. $H _2 SO _4$ at 413 K , the compound obtained is :
  • A
    $CH _2= CH _2$
  • ✓
    $C _2 H _5- O - C _2 H _5$
  • C
    $C _2 H _5 HSO _4$
  • D
    $\left( C _2 H _5\right)_2 SO _4$
Answer
Correct option: B.
$C _2 H _5- O - C _2 H _5$
b
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MCQ 381 Mark
The compound which does not react with sodium metal is :
  • A
    $CH _3 OH$
  • B
    $CH _3 COOH$
  • C
    $C _6 H _5 OH$
  • ✓
    $CH _3- O - CH _3$
Answer
Correct option: D.
$CH _3- O - CH _3$
d
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MCQ 391 Mark
Alcohols having molecular formula $C _3 H _8 O$, can be :
  • A
    Only primary
  • B
    Only secondary
  • ✓
    Primary and secondary
  • D
    Primary, secondary and tertiary
Answer
Correct option: C.
Primary and secondary
c
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M.C.Q (1 Marks) - Chemistry STD 12 Science Questions - Vidyadip