MCQ

MCQ 11 Mark

Identify Swartz reaction from the following.

A
$R - OH + HX \underset{\text { condition }}{\stackrel{\text { Suitable }}{\longrightarrow}} R - X + H _2 O$
✓
$R - Cl + AgF \stackrel{\Delta}{\longrightarrow} R - F + AgCl$
C
$R - OH + PCl _5 \longrightarrow R - Cl + HCl + POCl _3$
D
non of these

Answer

Correct option: B.

$R - Cl + AgF \stackrel{\Delta}{\longrightarrow} R - F + AgCl$

View full question & answer→

MCQ 21 Mark

Which among the following is NOT an example of Wurtz reaction?

A
$CH _3 Br + C _2 H _5 Br \underset{\text { dry ether }}{\longrightarrow} C _2 H _6+ C _3 H _8+ C _4 H _{10}$
✓
C
$2 CH _3 Br +2 Na \stackrel{\text { dry ether }}{\longrightarrow} C _2 H _6+2 NaBr$
D
$2 C _2 H _5 Br +2 Na \stackrel{\text { dry ether }}{\longrightarrow} C _4 H _{10}+2 NaBr$

Answer

Correct option: B.

View full question & answer→

MCQ 31 Mark

Which among the following examples of halogen derivatives does NOT correctly match with its type of compound?

A
Halo alkane $\quad: \quad$ Methyl chloride
B
Benzylic halide $\quad: \quad$ Benzyl chloride
C
Haloarene : Chlorobenzene
✓
Allylic halide $\quad: \quad$ 1-chloroethene

Answer

Correct option: D.

Allylic halide $\quad: \quad$ 1-chloroethene

View full question & answer→

MCQ 41 Mark

Which among the following compounds has chiral carbon atom?

A
$\left( CH _3 CH _2\right)_2 CHCl$
✓
$CH _3 CH ( Cl ) CH _2 CH _3$
C
$\left( CH _3\right)_3- CCl$
D
$\left( CH _3\right)_2- CHCl$

Answer

Correct option: B.

$CH _3 CH ( Cl ) CH _2 CH _3$

View full question & answer→

MCQ 51 Mark

Which of the following compounds has difficulty in breaking $C - X$ bond ?

A
2,4,6-trinitrochlorobenzene
✓
$m$ - nitrochlorobenzene
C
0 - nitrochlorobenzene
D
$P$ - nitrochlorobenzene

Answer

Correct option: B.

$m$ - nitrochlorobenzene

View full question & answer→

MCQ 61 Mark

The correct order of reactivity for reactions involving cleavage of $C - X$ bond in following compounds is

A
I $>$ II $>$ III
✓
III $>$ II $>$ I
C
II $>$ III $>$ I
D
I $>$ III $>$ II

Answer

Correct option: B.

III $>$ II $>$ I

View full question & answer→

MCQ 71 Mark

Identify optically active substance from the following.

✓
$CH _3 CH ( Br ) CH _2 CH _3$
B
$\left( CH _3\right)_2 C ( Br ) CH _3$
C
$CH _3\left( CH _2\right)_3 CH _2 Br$
D
$\left( CH _3\right)_2 CH CH ( Br ) CH \left( CH _3\right)_2$

Answer

Correct option: A.

$CH _3 CH ( Br ) CH _2 CH _3$

View full question & answer→

MCQ 81 Mark

Identify tertiary alkyl halide from the following.

A
$\left( CH _3\right)_3- C - CH _2- Br$
B
$CH _3-\left( CH _2\right)_4- CH _2- Br$
C
$\left( CH _3\right)_2- CH - CH _2- Br$
✓
$\left( CH _3\right)_3- C - Br$

Answer

Correct option: D.

$\left( CH _3\right)_3- C - Br$

View full question & answer→

MCQ 91 Mark

{ Identify the alkyl halide that undergoes } $SN ^2 $ { reaction most fastly. }

Answer

Correct option: B.

View full question & answer→

MCQ 101 Mark

Identify product $P$ in the following reaction.
$C _2 H _5- Mg - Br + NH _3 \longrightarrow P$

✓
$C _2 H _6$
B
$HC \equiv CH$
C
$H _2 C = CH _2$
D
$C _2 H _5 Br$

Answer

Correct option: A.

$C _2 H _6$

View full question & answer→

MCQ 111 Mark

Identify Finkelstein reaction from the following

A
$C _2 H _5 Cl + KCN \stackrel{\Delta}{\longrightarrow} C _2 H _5 CN + KCl$
B
$C _2 H _5 Cl + AgF \stackrel{\Delta}{\longrightarrow} C _2 H _5 F + AgCl$
✓
$C _2 H _5 Cl + NaI \stackrel{\text { acetone }}{\longrightarrow} C _2 H _5 I + NaCl$
D
$C _2 H _5 Cl + NaOH \longrightarrow C _2 H _5 OH + NaCl$

Answer

Correct option: C.

$C _2 H _5 Cl + NaI \stackrel{\text { acetone }}{\longrightarrow} C _2 H _5 I + NaCl$

View full question & answer→

MCQ 121 Mark

Choose the false statement from following.

A
Good yield of alkyl halide may be obtained by heating alcohols with $NaI$ in 95\% $H _3 PO _4$.
B
Constant boiling $HBr (48 \%)$ is used for the preparation of alkyl bromides from alcohols.
C
Tertiary alcohol readily react with conc. $HCl$ in absence of zinc chloride.
✓
The order of reactivity of alcohols with a given halo acid $1^{\circ}>2^{\circ}>3^{\circ}$

Answer

Correct option: D.

The order of reactivity of alcohols with a given halo acid $1^{\circ}>2^{\circ}>3^{\circ}$

View full question & answer→

MCQ 131 Mark

WLive Which of the following reactions is used to prepare toluene from bromobenzene?

A
Wurtz reaction
B
Fittig reaction
✓
Wurtz-Fittig reaction
D
Swartz reaction

Answer

Correct option: C.

Wurtz-Fittig reaction

View full question & answer→

MCQ 141 Mark

What is the product formed when aniline is treated with $NaNO _2+ HCl$ previous to hydrolysis?

✓
Benzene diazonium chloride
B
Phenol $+ N _2 \uparrow$
C
Benzene
D
Phenol

Answer

Correct option: A.

Benzene diazonium chloride

View full question & answer→

MCQ 151 Mark

Which among the following statements is NOT correct about $SN ^2$ reaction mechanism?

A
Rate of reaction is dependent on the concentration of nucleophile.
B
Nucleophile attacks the carbon atom from the side opposite to halogen.
C
Bond formation and bond breaking occurs simultaneously.
✓
$SN ^2$ mechanism is observed in tertiary alkyl halides.

Answer

Correct option: D.

$SN ^2$ mechanism is observed in tertiary alkyl halides.

View full question & answer→

MCQ 161 Mark

Which among the following compounds is used in Swartz reaction?

✓
AgF
B
KCN
C
$AgCN$
D
$Nal$

Answer

Correct option: A.

AgF

View full question & answer→

MCQ 171 Mark

Identify chiral molecule from the following.

A
$\left( CH _3\right)_2- CH - CH ( Cl )- CH -\left( CH _3\right)_2$
✓
$CH _3 CH ( Cl ) CH _2 CH _3$
C
$CH _3 CH ( Cl ) CH _3$
D
$\left( CH _3\right)_3- C - Cl$

Answer

Correct option: B.

$CH _3 CH ( Cl ) CH _2 CH _3$

View full question & answer→

MCQ 181 Mark

Which among the following compounds is vinylic halide?

A
2-chloropropane
B
2-Bromo-2-methylpropane
C
Bromoethane
✓
1-chloroethene

Answer

Correct option: D.

1-chloroethene

View full question & answer→

MCQ 191 Mark

Which among the following compounds converts alkyl halides to nitro alkanes?

A
alc. Potassium cyanide
B
Potassium nitrite
C
alc. Silver cyanide
✓
Silver nitrite

Answer

Correct option: D.

Silver nitrite

View full question & answer→

MCQ 201 Mark

Which among the following compounds have highest boiling point ?

✓
$CH _3 CH ( Cl ) CH _2 CH _3$
B
$CH _3 Cl$
C
$CH _3 CH _2 CH _2 Cl$
D
$CH _3 CH _2 Cl$

Answer

Correct option: A.

$CH _3 CH ( Cl ) CH _2 CH _3$

View full question & answer→

MCQ 211 Mark

Which among the following is a Lucas reagent?

A
$H _2 / Ni$
✓
$HCl / ZnCl _2$
C
$Na - Hg / H _2 O$
D
$Zn - Hg / HCl$

Answer

Correct option: B.

$HCl / ZnCl _2$

View full question & answer→

MCQ 221 Mark

Which among the following reactions does not occur?

A
$C _2 H _5 Br + KNO _2 \longrightarrow C _2 H _5- O - N = O + KBr$
B
C
$C _2 H _5 Br + AgCN \longrightarrow C _2 H _5 NC + AgBr$
✓
$C _2 H _5 Br + KCN \longrightarrow C _2 H _5 NC + KBr$

Answer

Correct option: D.

$C _2 H _5 Br + KCN \longrightarrow C _2 H _5 NC + KBr$

View full question & answer→

MCQ 231 Mark

Which among the following compounds undergoes $\mathrm{SN}^2$ reaction fastly ?

Answer

Correct option: B.

View full question & answer→

MCQ 241 Mark

Which of the following is used as source of dichlorocarbene

A
tetrachloromethane
✓
chloroform
C
iodoform
D
$\text{DDT}$

Answer

Correct option: B.

chloroform

View full question & answer→

Question 251 Mark

The product ‘B’ in the above reaction sequence is,

Answer

View full question & answer→

MCQ 261 Mark

Choose the compound from the following that will react fastest by $S _{ N } 1$ mechanism.

A
1-iodobutane
B
1-iodopropane
✓
2-iodo-2 methylbutane
D
2-iodo-3-methylbutane

Answer

Correct option: C.

2-iodo-2 methylbutane

View full question & answer→

MCQ 271 Mark

Butanenitrile may be prepared by heating

A
propanol with KCN
B
butanol with KCN
C
n-butyl chloride with KCN
✓
n-propyl chloride with KCN

Answer

Correct option: D.

n-propyl chloride with KCN

View full question & answer→

Question 281 Mark

An alkyl chloride on Wurtz reaction gives 2,2,5,5-tetramethylhexane. The same alkyl chloride on reduction with zinc-copper couple in alchol give hydrocarbon with molecular
formula $C_5H_{12}.$ What is the structure of alkyl chloride

Answer

View full question & answer→

MCQ 291 Mark

Identify the chiral molecule from the following.

A
1-Bromobutane
B
1,1- Dibromobutane
C
2,3- Dibromobutane
✓
2-Bromobutane

Answer

Correct option: D.

2-Bromobutane

View full question & answer→

MCQ 301 Mark

The best method for preparation of alkyl fluorides is

A
Finkelstein reaction
✓
Swartz reaction
C
Free radical fluorination
D
Sandmeyer’s reaction

Answer

Correct option: B.

Swartz reaction

View full question & answer→

MCQ 311 Mark

Which of the following is likely to undergo racemization during alkaline hydrolysis?

✓
Only I
B
only II
C
II and IV
D
Only IV

Answer

Correct option: A.

Only I

View full question & answer→

Question 321 Mark

$CH _3- CH = CH _2 \underset{\text { peroxide }}{\stackrel{\text { HI }}{\longrightarrow}}$

The major product of the above reaction is,

Answer

View full question & answer→

MCQ 331 Mark

The correct order of increasing reactivity of C-X bond towards nucleophile in the following compounds is

A
I < II < III < IV
B
II < I < III < IV
C
III < IV < II < I
✓
IV < III < I < II

Answer

Correct option: D.

IV < III < I < II

View full question & answer→

MCQ 341 Mark

Identify the reagent $A$ in the following conversion : Alkyl halide $\xrightarrow{A}$ Alkyl nitrite

A
$KNO _3$
B
$NaNO _3$
C
$Ag NO _2$
✓
$KNO _2$

Answer

Correct option: D.

$KNO _2$

(d) : Alkyl halide $\xrightarrow{ KNO _3}$ Alkyl nitrite

View full question & answer→

MCQ 351 Mark

Identify the chiral molecule from following.

A
2-Bromopropane
B
2-Bromo-2-methylbutane
✓
2-Bromo-3-methylbutane
D
3-Bromopentane

Answer

Correct option: C.

2-Bromo-3-methylbutane

${ }^*$Represents chiral centre having four different groups attached to carbon.

View full question & answer→

MCQ 361 Mark

Which among the following is haloalkyne?

✓
Chloroethyne
B
3-Chlorobut-1-yne
C
1-Chloropent-2-yne
D
4-Chloropent-2-yne

Answer

Correct option: A.

Chloroethyne

(a) : $\mathrm{HC} \equiv \mathrm{C}-\mathrm{Cl}$
Chloroethyne
In haloalkyne, halogen atom is bonded to an alkynyl group.

View full question & answer→

MCQ 371 Mark

Which of the following is a structural formula of DDT?

Answer

Correct option: C.

View full question & answer→

MCQ 381 Mark

Which among the following is not a true statement for enantiomers?

A
Enantiomers have identical refractive index.
B
Enantiomers have same chemical properties.
✓
Enantiomers are superimposable mirror images of each other.
D
Enantiomers have equal but opposite optical rotation.

Answer

Correct option: C.

Enantiomers are superimposable mirror images of each other.

(c): Enantiomers are the optical isomers which are non-superimposable mirror images of each other.

View full question & answer→

MCQ 391 Mark

What is IUPAC name of the following compound?

A
3-Bromo-4-ethylbut-3-ene
✓
3-Bromo-4-methylhex-3-ene
C
4-Bromo-3-methylhex-3-ene
D
4-Bromo-4-ethyl-3-methylbut-3-ene

Answer

Correct option: B.

3-Bromo-4-methylhex-3-ene

(b) :

View full question & answer→

MCQ 401 Mark

Identify the product obtained when bromoethane is heated with excess of alcoholic ammonia under pressure.

A
Ethene
✓
Ethanamine
C
Nitroethane
D
Ethanol

Answer

Correct option: B.

Ethanamine

(b): $C _2 H _5 Br + NH _3 \xrightarrow{\text { alc. }} C _2 H _5 NH _2+ HBr$
$\quad$$\quad$Bromoethane$\quad$Excess$\quad$$\quad$Ethanamine
When primary alkyl halide is treated with excess of alcoholic ammonia, then primary amine is obtained as the major product.

View full question & answer→

MCQ 411 Mark

Identify tertiary alkyl halide from the following.

A
$\left( CH _3\right)_3 C - CH _2- Br$
✓
$\left( CH _3\right)_3 C - Br$
C
$CH _3-\left( CH _2\right)_4- CH _2- Br$
D
$\left( CH _3\right)_2- CH - CH _2- Br$

Answer

Correct option: B.

$\left( CH _3\right)_3 C - Br$

(b) : The alkyl halide in which a halogen atom is directly attached to tertiary carbon atom is known as tertiary alkyl halide. The other three are primary alkyl halides.

View full question & answer→

MCQ 421 Mark

Which of the following is obtained by the following reaction? $ 2 C _2 H _5 Br +2 Na \xrightarrow{\text { Dry ether }}$

✓
Butane
B
Propane
C
Ethane
D
Methane

Answer

Correct option: A.

Butane

(a): $CH _3 CH _2 Br +2 Na + BrCH _2 CH _3 \xrightarrow{\text { Dry ether }}$
$
\underset{\text { Butane }}{ CH _3 CH _2 CH _2 CH _3+2 NaBr }
$

View full question & answer→

MCQ 431 Mark

What is the IUPAC name of the following compound?

✓
2-Bromo-4,4,6-trimethyl octane
B
3-Bromo-5,5,7-trimethyl octane
C
2-Bromo-4,4,6-trimethyl nonane
D
3-Bromo-5,5,7-trimethyl nonane

Answer

Correct option: A.

2-Bromo-4,4,6-trimethyl octane

(a) 2-Bromo-4,4,6-trimethyl octane

View full question & answer→

MCQ 441 Mark

Which reaction is useful in exchange of halogen in alkyl chloride by iodide?

A
Wurtz reaction
✓
Finkelstein reaction
C
Reimer-Tiemann reaction
D
Williamson synthesis

Answer

Correct option: B.

Finkelstein reaction

(b): Iodoalkanes can be easily prepared from the corresponding chloroalkanes by heating the chloroalkane with sodium iodide in acetone or methanol. This reaction is called Finkelstein reaction.

View full question & answer→

MCQ 451 Mark

The reaction in which two molecules of chlorobenzene reacts with metallic sodium in presence of dry ether forming diphenyl is an example of

✓
Wurtz-Fittig reaction
B
Wurtz reaction
C
Rosenmund reaction
D
Balz-Schiemann reaction.

Answer

Correct option: A.

Wurtz-Fittig reaction

(a): When a mixture of an alkyl halide and aryl halide gives an alkylarene on treatment with sodium in dry ether, the reaction is called Wurtz-Fittig reaction.
When only haloarenes are treated with sodium, aryls are formed. This reaction is called Fittig reaction.

Note : Option (a) should be Fittig reaction in place of Wurtz-Fittig reaction.

View full question & answer→

MCQ 461 Mark

In case of $R, S$ configuration the group having highest priority is

A
$- NO _2$
B
$- NH _2$
C
$- CN$
✓
$- OH$

Answer

Correct option: D.

$- OH$

(d) : Atomic mass of oxygen is more than that of $C$ and $N$.

View full question & answer→

MCQ 471 Mark

Arenes on treatment with chlorine in presence of ferric chloride as a catalyst undergo what type of reaction?

✓
Electrophilic substitution
B
Nucleophilic substitution
C
Electrophilic addition
D
Nucleophilic addition

Answer

Correct option: A.

Electrophilic substitution

(a) :

This is an electrophilic substitution reaction.

View full question & answer→

MCQ 481 Mark

In assigning $R, S$-configuration which among the following groups has highest priority?

✓
$- SO _3 H$
B
$- COOH$
C
$- CHO$
D
$- C _6 H _5$

Answer

Correct option: A.

$- SO _3 H$

(a) $- SO _3 H$

View full question & answer→

MCQ 491 Mark

The conversion of ethyl bromide to ethyl iodide using sodium iodide and dry acetone, this reaction is known as

A
Swarts reaction
✓
Finkelstein reaction
C
Sandmeyer reaction
D
Stephen reaction

Answer

Correct option: B.

Finkelstein reaction

(b) : Finkelstein reaction is used for the preparation of alkyl iodides from alkyl chlorides or bromides using sodium or potassium iodide and acetone.
$
\underset{\text { Ethyl bromide }}{ CH _3 CH _2 Br + KI \xrightarrow{\text { Acetone }}} \underset{\text { Ethyl iodide }}{ CH _3 CH _2 I }+ KBr
$

View full question & answer→

MCQ 501 Mark

While assigning $R, S$ configuration the correct order of priority of groups attached to chiral carbon atom is

A
$CONH _2> COCH _3> CH _2 OH > CHO$
✓
$CONH _2> COCH _3> CHO > CH _2 OH$
C
$COCH _3> CONH _2> CHO > CH _2 OH$
D
$CHO > CH _2 OH > COCH _3> CONH _2$

Answer

Correct option: B.

$CONH _2> COCH _3> CHO > CH _2 OH$

(b) : The order of priority is
$
CONH _2> COCH _3> CHO > CH _2 OH
$

View full question & answer→

Chemistry MCQ

Test yourself on this topic