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Chemistry MCQ

Amines · Maharashtra Board STD 12 Science (MSBSHSE - English Medium). 104 questions.

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MCQ 11 Mark
Which among the following reagents is used to distinguish primary, secondary and tertiary amines according to solubility in alkaline medium ?
  • ✓
    Benzenesulphonyl chloride
  • B
    Iodoform
  • C
    Ethylene glycol
  • D
    Acetyl chloride
Answer
Correct option: A.
Benzenesulphonyl chloride
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MCQ 21 Mark
Identify Hinsberg reagent from following.
  • A
    Benzyl chloride
  • ✓
    Benzene sulphonyl chloride
  • C
    Benzene diazonium chloride
  • D
    Benzoyl chloride
Answer
Correct option: B.
Benzene sulphonyl chloride
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MCQ 31 Mark
Which among the following compounds is an amide?
  • A
    $CH _3 NO _2$
  • ✓
    $CH _3 CONH _2$
  • C
    $CH _3 CN$
  • D
    $CH _3 NH _2$
Answer
Correct option: B.
$CH _3 CONH _2$
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MCQ 41 Mark
Identify the amine that does not form alcohol by the action of $NaNO _2$ and $HCl$.
  • A
    $\left( CH _3\right)_3- C - NH _2$
  • ✓
    $\left( CH _3\right)_2- NH$
  • C
    Image
  • D
    $CH _3- CH _2- NH _2$
Answer
Correct option: B.
$\left( CH _3\right)_2- NH$
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MCQ 51 Mark
Identify the $x$ in the reaction. $R - NH _2+ HNO _2 \underset{273-278 K }{\stackrel{ NaNO _2+ HCl }{\longrightarrow}} x \stackrel{ H _2 O }{\longrightarrow} R - OH + N _2 \uparrow+ HCl$
  • A
    $R - NO _2$
  • B
    $R - NH - N = O$
  • C
    $R - NH - NO _2$
  • ✓
    Image
Answer
Correct option: D.
Image
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MCQ 61 Mark
What is the IUPAC name of $\left( CH _3\right)_2- N - CH _3$ ?
  • A
    2, 2-Dimethylmethanamine
  • ✓
    $N , N$-Dimethylmethanamine
  • C
    N-Methyldimethanamine
  • D
    Trimethylamine
Answer
Correct option: B.
$N , N$-Dimethylmethanamine
B
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MCQ 71 Mark
Which of the following conversions needs the reagent $Sn / HCl$ ?
  • A
    $R - C \equiv N \longrightarrow R - CH _2- NH _2$
  • B
    $R - CO - NH _2 \longrightarrow R - NH _2$
  • ✓
    $R - NO _2 \longrightarrow R - NH _2+2 H _2 O$
  • D
    $R - CO - NH _2 \longrightarrow R - CH _2- NH _2$
Answer
Correct option: C.
$R - NO _2 \longrightarrow R - NH _2+2 H _2 O$
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MCQ 81 Mark
What is the number of primary amine molecules among the following compounds? 
Image
  • A
    3
  • ✓
    4
  • C
    1
  • D
    2
Answer
Correct option: B.
4
B
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MCQ 91 Mark
The correct structure of prop $-2- en -1-$ amine is
  • ✓
    $H _2 C = CH - CH _2- NH _2$
  • B
    Image
  • C
    $CH _3- CH = CH - NH _2$
  • D
    Non of these
Answer
Correct option: A.
$H _2 C = CH - CH _2- NH _2$
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MCQ 111 Mark
The end product in Hofmann's exhaustive methylation of amines is Quaternary ammonium halide
  • ✓
    Tertiary amine
  • B
    Primary amire
  • C
    Secondary amine
  • D
    non of these
Answer
Correct option: A.
Tertiary amine
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MCQ 121 Mark
What is the number of primary amines possible for the compound having molecular formula $C _4 H _{11} N$ ?
  • ✓
    $4$
  • B
    $3$
  • C
    $1$
  • D
    $2$
Answer
Correct option: A.
$4$
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MCQ 141 Mark
What is the product formed when benzene diazonium chloride reacts with ethanol?
  • A
    Ethyl benzene
  • B
    Phenol
  • ✓
    Benzene
  • D
    Benzyl alcohol
Answer
Correct option: C.
Benzene
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MCQ 151 Mark
Which among the following reactions represents carbylamine reaction?
  • A
    $R - NH _2+ CH _3 COCl \stackrel{\text { pyridine }}{\longrightarrow} R - NH - COCH _3+ HCl$
  • B
    $R - NH _2+3 R - X \longrightarrow R _4 N ^{+} \overline{ X }+2 HX$
  • ✓
    $R - NH _2+ CHCl _3+3 KOH \underset{\text { alc }}{\stackrel{\Delta}{\longrightarrow}} R - NC +3 KCl +3 H _2 O$
  • D
    $R - NH _2+ HNO _2 \frac{\text { i) } NaNO _2+ HCl }{\text { ii) } H _2 O } R - OH + N _2 \uparrow+ HCl$
Answer
Correct option: C.
$R - NH _2+ CHCl _3+3 KOH \underset{\text { alc }}{\stackrel{\Delta}{\longrightarrow}} R - NC +3 KCl +3 H _2 O$
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MCQ 161 Mark
Which among the following molecules has lowest $p ^{ Kb }$ value ?
  • A
    $CH _3 CH _2 NH _2$
  • B
    $CH _3 NH _2$
  • ✓
    $\left( CH _3 CH _2\right)_2 NH$
  • D
    $\left( CH _3 CH _2\right)_3 N$
Answer
Correct option: C.
$\left( CH _3 CH _2\right)_2 NH$
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MCQ 171 Mark
Identify the Gabriel phthalimide synthesis reaction from the reactants and reagents used in it from following.
  • A
    $R - C \equiv N +[ H ] \frac{ LiAlH _4}{\text { ether }}>$ product
  • B
    $R - CO - NH _2+ Br _2+4 NaOH _{(\text {aq. })} \stackrel{\Delta}{\longrightarrow}$ product
  • C
    $R - CO - NH _2+[ H ] \frac{ LiAlH _4}{\text { ether }}>$ product
  • ✓
    Image
Answer
Correct option: D.
Image
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MCQ 181 Mark
Which among the following is a correct order of $p^{k b}$ values of amines?
  • A
    $R _3 N > R _2- NH > R - NH _2> NH _3$
  • B
    $R _2 NH > R _3 N > R - NH _2> NH _3$
  • ✓
    $NH _3> R - NH _2> R _2 NH < R _3 N$
  • D
    $NH _3> R - NH _2> R _2- NH > R _3 N$
Answer
Correct option: C.
$NH _3> R - NH _2> R _2 NH < R _3 N$
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MCQ 191 Mark
How many moles of ethyl bromide is required for formation of 1 mole N,N-Diethylethanamin from ethyl amine?
  • A
    4
  • B
    3
  • C
    1
  • ✓
    2
Answer
Correct option: D.
2
D
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MCQ 201 Mark
Which one of the following compounds contains azo linkage?
  • A
    Hydrazine
  • ✓
    p-Hydroxyazobenzene
  • C
    N-Nitrosodiethylamine
  • D
    Ethylenediamine
Answer
Correct option: B.
p-Hydroxyazobenzene
p-Hydroxyazobenzene
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MCQ 211 Mark
Identify ' $B$ ' in the following reactions $CH _3- C \equiv N \stackrel{ Na / C _2 H _3 OH }{\longrightarrow} A \stackrel{ NaNO / dilHCl }{\longrightarrow} B$
  • A
    $CH _3- CH _2- NH _2$
  • B
    $CH _3- CH _2- NO _2$
  • C
     $CH _3- CH _2 N _2{ }^{\oplus} Cl ^{\ominus}$
  • ✓
    $CH _3- CH _2- OH$
Answer
Correct option: D.
$CH _3- CH _2- OH$
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MCQ 221 Mark
Which of the following compounds will dissolve in aqueous NaOH after undergoing reaction with Hinsberg reagent?
  • ✓
    Ethylamine
  • B
    Triethylamine
  • C
    Trimethylamine
  • D
    Diethylamine
Answer
Correct option: A.
Ethylamine
Ethyl amine
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MCQ 231 Mark
Which one of the following compounds does not react with acetyl chloride?
  • A
    $CH _3- CH _2- NH _2$
  • B
    $\left( CH _3- CH _2\right)_2 NH$
  • ✓
    $\left( CH _3- CH _2\right)_3 N$
  • D
    $C _6 H _5- NH _2$
Answer
Correct option: C.
$\left( CH _3- CH _2\right)_3 N$
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MCQ 241 Mark
Carbylamine test is given by
  • ✓
    Primary amine
  • B
    Secondary amine
  • C
    Tertiary amine
  • D
    Both secondary and tertiary amines
Answer
Correct option: A.
Primary amine
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MCQ 251 Mark
Which type of amine does produce $N _2$ when treated with $HNO _2$ ?
  • ✓
    Primary amine
  • B
    Secondary amine
  • C
    Tertiary amine
  • D
    Both primary and secondary amines
Answer
Correct option: A.
Primary amine
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MCQ 261 Mark
Which of the following has the highest basic strength?
  • A
    Trimethylamine
  • B
    Methylamine
  • C
    Ammonia
  • ✓
    Dimethylamine
Answer
Correct option: D.
Dimethylamine
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MCQ 271 Mark
Which one of the following compounds has the highest boiling point?
  • ✓
    n-Butylamine
  • B
    sec-Butylamine
  • C
    isobutylamine
  • D
    tert-Butylamine
Answer
Correct option: A.
n-Butylamine
n-Butylamine
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MCQ 281 Mark
Isobutylamine is an example of ………………………..
  • ✓
    2° amine
  • B
    3° amine
  • C
    1° amine
  • D
    quaternary ammonium salt.
Answer
Correct option: A.
2° amine
2° amine
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MCQ 291 Mark
The hybridization of nitrogen in primary amine is ………………………..
  • A
    $sp$
  • B
    $sp ^2$
  • ✓
    $s^3$
  • D
    $sp ^3 d$
Answer
Correct option: C.
$s^3$
$sp ^3 d$
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MCQ 301 Mark
What is IUPAC name of allylamine?
  • A
    Propan-1-amine
  • ✓
    Prop-2-en-1-amine
  • C
    Prop-1-en-2-amine
  • D
    Propan-2-amine
Answer
Correct option: B.
Prop-2-en-1-amine
(b) :
Image
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MCQ 311 Mark
Which of the following amines undergoes acylation reaction?
  • A
    Ethyldimethylamine
  • ✓
    N-Methylaniline
  • C
    N,N-Dimethylmethanamine
  • D
    N,N-Dimethylaniline
Answer
Correct option: B.
N-Methylaniline
(b) : Primary and secondary amines undergo acylation reaction.
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MCQ 321 Mark
What is the IUPAC name of following compound?
  • A
    1-Methylbut-2-en-1-amine
  • ✓
    Pent-3-en-2-amine
  • C
    Pent-2-en-4-amine
  • D
    4-Methyl but-2-en-4-amine
Answer
Correct option: B.
Pent-3-en-2-amine
(b) :
Image
The IUPAC name of the compound is pent-3-en-2-amine.
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MCQ 331 Mark
What is molecular formula of cyclohexylamine?
  • A
    $C _6 H _8 N$
  • ✓
    $C _6 H _{10} N$
  • C
    $C _6 H _{12} N$
  • D
    $C _6 H _{13} N$
Answer
Correct option: B.
$C _6 H _{10} N$
(b) :
Image
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MCQ 341 Mark
Which of the following amines on heating with chloroform generate foul smelling product?
  • ✓
    Ethanamine
  • B
    Ethylmethyl amine
  • C
    Ethyldimethyl amine
  • D
    Diethylmethyl amine
Answer
Correct option: A.
Ethanamine
(a) : Primary amines, when heated with chloroform and alcoholic $KOH$, give foul smelling product i.e., isocyanide.
$
\underset{\text { Ethanamine }}{ C _2 H _5 NH _2} \xrightarrow{ CHCl _3+\text { alc. } KOH } \underset{\text { Ethyl isocyanide }}{ C _2 H _5 NC }+3 KCl +3 H _2 O
$
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MCQ 351 Mark
Which isomer among the following has highest boiling point?
  • ✓
    n-Butylamine
  • B
    tert-Butylamine
  • C
    Ethyldimethylamine
  • D
    Diethylamine
Answer
Correct option: A.
n-Butylamine
(a) : In case of isomeric amines, boiling point decreases with branching.
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MCQ 361 Mark
Identify the product ' $B$ ' in the following sequence of reactions.$CH _3 Br \xrightarrow{ KCN } A \xrightarrow{ Na / C _2 H _3 OH } B$
  • A
    Methyl cyanide
  • ✓
    Ethylamine
  • C
    Methylamine
  • D
    Ethyl cyanide
Answer
Correct option: B.
Ethylamine
(b):
$
CH _3 Br \xrightarrow{ KCN } \underset{(A)}{ CH _3 CN } \xrightarrow{ Na  / C _2 H _5 OH } \underset{\text { Ethylamine (B) }}{ CH _3 CH _2 NH _2}
$
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MCQ 371 Mark
What is the IUPAC name of $\left( CH _3\right)_2 N - CH _3$ ?
  • A
    Trimethylamine
  • B
    2,2-Dimethylmethanamine
  • ✓
    N,N-Dimethylmethanamine
  • D
    $N$-Methyldimethanamine
Answer
Correct option: C.
N,N-Dimethylmethanamine
(c) :
Image
Trimethylamine (common name)
$N, N$-Dimethylmethanamine(IUPAC name)
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MCQ 381 Mark
Which among the following reagents is used to distinguish primary, secondary and tertiary amines according to solubility in alkaline medium?
  • ✓
    Benzenesulphonyl chloride
  • B
    Iodoform
  • C
    Ethylene glycol
  • D
    Acetyl chloride
Answer
Correct option: A.
Benzenesulphonyl chloride
(a) : Benzenesulphonyl chloride $\left( C _6 H _3 SO _2 Cl \right)$, which is also known as Hinsberg reagent is used to distinguish primary, secondary and tertiary amines.
The reaction of benzenesulphonyl chloride with primary amine yields $N$-alkylbenzene sulphonamide which is soluble in alkali. With secondary amine, it yields $N , N$-dialkylbenzene sulphonamide which is insoluble in alkali. Tertiary amines do not react with benzenesulphonyl chloride.
$
C _6 H _5 SO _2 Cl + RNH _2 \longrightarrow C _6 H _5 SO _2 NHR
$
(Soluble in alkali due to presence of acidic hydrogen atom attached to nitrogen atom.)
$
C _6 H _5 SO _2 Cl + R _2 NH \longrightarrow C _6 H _5 SO _2 NR _2
$
(Insoluble in akali due to absence of any hydrogen atom attached to nitrogen atom.)
$
C _6 H _5 SO _2 Cl _3+ R _3 N \longrightarrow \text { No reaction. }
$
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MCQ 391 Mark
Tertiary amines with Hinsberg's reagent give
  • ✓
    no reaction
  • B
    products which are same as that of $1^{\circ}$ amine
  • C
    products which are same as that of $2^{\circ}$ amine
  • D
    products which are a quaternary salt.
Answer
Correct option: A.
no reaction
(a) : Benzenesulphonyl chloride $\left( C _6 H _3 SO _2 Cl \right)$ is also known as Hinsberg's reagent and tertiary amines do not react with Hinsberg's reagent.
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MCQ 401 Mark
Which of the following reactions does not yield an amine?
  • A
    $R - X + NH _3 \longrightarrow$
  • B
    $R - CH = NOH +[ H ] \xrightarrow[ C _2 H _2 OH ]{ Na }$
  • ✓
    $R - CN + H _2 O \xrightarrow{ H ^{+}}$
  • D
    $R - CONH _2+[ H ] \xrightarrow{ LiAlH _4}$
Answer
Correct option: C.
$R - CN + H _2 O \xrightarrow{ H ^{+}}$
(c) :
$\begin{array}RR-X+ NH _3 \longrightarrow R- NH _2+ H X \\
R- CH = NOH +4[ H ] \xrightarrow[\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}]{\mathrm{Na}} R CH _2 NH _2+ H _2 O \\
R- CONH _2+4[ H ] \xrightarrow{ LiAl _4} R CH _2 NH _2+ H _2 O
\end{array}
$
$R- CN + H _2 O \xrightarrow{ H ^{+}} R- COOH$
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MCQ 411 Mark
Nitroalkanes are obtained in laboratory from primary or secondary alkyl halides by the action
  • ✓
    $AgNO _2$
  • B
    $NaNO _3$
  • C
    $AgNO _3$
  • D
    $HNO _3$
Answer
Correct option: A.
$AgNO _2$
(a) : $R-X+ AgNO _2 \xrightarrow{\Delta} R- NO _2+ AgX$ (akc.)
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MCQ 421 Mark
Identify the amine formed when ethyltrimethyl ammonium iodide is treated with silver hydroxide and further heated strongly.
  • A
    $C _2 H _5 N \left( CH _3\right)_2$
  • B
    $C _2 H _5 NH _2$
  • ✓
    $\left( CH _3\right)_3 N$
  • D
    $CH _3 NH _2$
Answer
Correct option: C.
$\left( CH _3\right)_3 N$
(c) :
Image
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MCQ 431 Mark
$\alpha$-Chlorosodium acetate on boiling with aqueous sodium nitrite gives
  • ✓
    nitromethane
  • B
    $\alpha$-chloronitromethane
  • C
    nitroethane
  • D
    acetyl chloride.
Answer
Correct option: A.
nitromethane
(a) :
Image
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MCQ 441 Mark
Which of the following reactions is used to prepare aryl fluorides from diazonium salts and fluoroboric acid?
  • A
    Sandmeyer reaction
  • ✓
    Balz-Schiemann reaction
  • C
    Gattermann reaction
  • D
    Swarts reaction
Answer
Correct option: B.
Balz-Schiemann reaction
(b): Balz-Schiemann reaction,
Image
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MCQ 451 Mark
Identify the product ' $C$ ' in the following reaction:$\text { Aniline }\xrightarrow[\text { Pyridine }]{\left( CH _3 CO \right)_2 O } A \xrightarrow[ CH _3 COOH ]{ Br _2}$$B \xrightarrow{ H ^{+} \text {or } OH ^{-}} C$
  • A
    Acetanilide
  • B
    $p$-Bromoacetanilide
  • ✓
    p-Bromoaniline
  • D
    o-Bromoaniline
Answer
Correct option: C.
p-Bromoaniline
(c) :
Image
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MCQ 461 Mark
The amine which reacts with p-toluenesulphonyl chloride to give a clear solution which on acidification gives insoluble compound is
  • ✓
    $C _2 H _5 NH _2$
  • B
    $\left( C _2 H _5\right)_2 NH$
  • C
    $\left( C _2 H _5\right)_3 N$
  • D
    $CH _3 NHC _2 H _5$
Answer
Correct option: A.
$C _2 H _5 NH _2$
(a): A primary amine gives a clear solution on reaction with $p$-toluenesulphonyl chloride which on further acidification gives an insoluble $N$-alkylbenzene sulphonamide.
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MCQ 471 Mark
Which of the following statement is incorrect in case of Hofmann bromamide degradation?
  • A
    Reaction is useful for decreasing length of carbon chain by one carbon atom.
  • ✓
    It gives tertiary amine.
  • C
    It gives primary amine.
  • D
    Aqueous or alcoholic $KOH$ is used with bromine.
Answer
Correct option: B.
It gives tertiary amine.
(b) : Hofmann bromamide reaction converts acid amides to primary amines.
$
R CONH _2+ Br _2+4 KOH \xrightarrow{\text { Heat }} \underset{amine}R NH _2+2 KBr + K _2 CO _3+2 H _2 O
$
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MCQ 481 Mark
Nitration of which among the following compounds yields cyclonite?
  • A
    Formaldehyde
  • B
    Benzaldehyde
  • ✓
    Urotropine
  • D
    Acetaldehyde ammonia
Answer
Correct option: C.
Urotropine
(c) :
Image
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MCQ 491 Mark
Primary nitroalkanes are obtained in good yield by oxidising aldoximes with the help of
  • ✓
    trifluoroperoxyacetic acid
  • B
    acidified potassium permanganate
  • C
    concentrated nitric acid
  • D
    potassium dichromate and dilute sulphuric acid.
Answer
Correct option: A.
trifluoroperoxyacetic acid
(a) :
Image
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MCQ 501 Mark
Select the compound which on treatment with nitrous acid liberates nitrogen.
  • A
    Nitroethane
  • B
    Triethylamine
  • C
    Diethylamine
  • ✓
    Ethylamine
Answer
Correct option: D.
Ethylamine
Primary aliphatic amines react with nitrous acid to form aliphatic diazonium salts which being unstable, liberate nitrogen gas and alcohols.
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