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151.

Diethyl amine on oxidation with `KMnO_(4)` producesA. EthanalB. PropanoneC. Tetraethyl hydrazineD. Ethyl amine and ethanol

Answer» Correct Answer - C
`{:(" "C_(2)H_(5)),(" |"),(2C_(2)H_(5)-N-H overset((O))(rarr)underset("Tetra ethyl hydrazine")((C_(2)H_(5))_(2)N-N(C_(2)H_(5))_(2))):}`
Discussion
152.

Treatment of ethyl amine and methyl magensium halide produces a gaseous substance X. X isA. EthaneB. AmmoniaC. MethaneD. Propane

Answer» Correct Answer - C
`CH_(3)CH_(2)NH_(2)+CH_(3)MgBr rarr CH_(4) uarr + (CH_(3)CH_(2)NH) MgBr`
Discussion
153.

Ethyl amine on oxidation in the presence of `KMnO_(4)` givesA. An aldehydeB. An acidC. An alcoholD. An N-oxide

Answer» Correct Answer - D
`C_(2)H_(5)NH_(2) overset([O])(rarr) underset("Ethylamine oxide")(C_(2)H_(5)-overset(O)overset(uarr)(N)H_(2))`
Discussion
154.

The gas evolved on reaction of ethyl amine with sidum metalA. `C_(2)H_(2)`B. `CO_(2)`C. `H_(2)`D. `N_(2)`.

Answer» Correct Answer - C
`C_(2)H_(5)NH_(2)+Na rarr C_(2)H_(5)NH^(-)Na^(+)+1//2 H_(2)`
Discussion
155.

Aniline when acetylated, the product on nitration followed by alkaline hydrolysis gaveA. `o-`NitroacetanilideB. `p-`NitroanilineC. `m-`NitroanilineD. Acetanilide

Answer» Correct Answer - B
p-Nitroaniline.
Discussion
156.

Which of the amine will not react with diethyl oxalate ?A. `(CH_(3))_(2)CH-NH_(2)`B. `C_(2)H_(5)NH_(2)`C. `(C_(2)H_(5))_(3)N`D. `(C_(2)H_(5))_(3)C-NH_(2)`.

Answer» Correct Answer - C
Tertiary amines do not react with diehtyl oxalate.
Discussion
157.

The amine which does not react with acetyl chloride is or which of the following cannot be acetylatedA. `CH_(3)NH_(2)`B. `(CH_(3))_(2)NH`C. `(CH_(3))_(3)N`D. None of these.

Answer» Correct Answer - C
Factual question.
Discussion
158.

Certain nitrogeneous compound with molecular mass (180) shown an increase in its molecular mass to 348 after treatment with acetyl chloride. The number of possible `-NH_(2)` groups in the molecule isA. 5B. 4C. 3D. 6

Answer» Correct Answer - B
The chemical reaction involved is as follows :
`-NH_(2)+Cl-overset(O)overset("||")(C)-CH_(3) underset(+CH_(3)CO)overset(-H)(rarr)-NH-overset(O)overset("||")(C)-CH_(3)`
Net increase in mol. mass on acylation of one `-NH_(2)` group = Mol. mass of `CH_(3)CO` group.
-At. mass of H
`=43-1=42`
Actual increase in mol. mass on acylation
`=348-180=168`
No. of group `CH_(3)-overset(O)overset("||")(C)-` added `=168//42=4`
the compound has `4-NH_(2)` groups.
Discussion
159.

The compound which on reaction with cold nitrous acid gives oily nitrosoamine isA. MethylamineB. DimethylamineC. TrimethylamineD. Triethylamine

Answer» Correct Answer - B
See reactions of amines (Comprehensive Review).
Discussion
160.

Tertiary amine is oxidized to oxide byA. `KMnO_(4)`B. `H_(2)O_(2)`C. `K_(2)Cr_(2)O_(7)`D. all of theses

Answer» Correct Answer - B
Discussion
161.

Following `2^(@)` amine has chiral carbon as indicated `H-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-NH_(2)`. This on reaction with `NaNO_(2)+ HCl`, fromA. `1^(@)` alcohol with reaction of configurationB. `2^(@)` alcohol with inverted configurationC. recemic mixture of `2^(@)` alcoholD. recemic mixture of `1^(@)` alcohol.

Answer» Correct Answer - C
Discussion
162.

`RNH_(2)` can be converted into R, NH and no other amine byA. its reaction with RXB. its reaction with `(CH_(3)Cl//KOH, Delta)` followed by reactionC. its reaction with `(CHCl_(3)//KOH, Delta)` followed by hydrolysisD. all of the above.

Answer» Correct Answer - B
Discussion
163.

The compound X `(C_(4)H_(11)N)` on treatement with nitrous acid gives a tertiary alcohol `(C_(4)H_(10)O)`. The compound X must also respond toA. Mustard oil reactionB. Libermann nitroso reactionC. Beckmann rearrangementD. Carbylamine reaction.

Answer» Correct Answer - A::D
X must be `1^(@)` amine as it produces alcohol by reaction with `HNO_(2)`. The probable structure of X is tertiary butyl amine
`{:(" "CH_(3)" "CH_(3)),(" |"" |"),(CH_(3)-C-NH_(2) overset(HNO_(2))(rarr) CH_(3)-C-OH),(" |"" |"),(" "CH_(3)" "CH_(3)),(" "(X) 1^(@)" Amine "3^(@)" Alcohol"):}`
X being `1^(@)` amine should also respond to mustard oil reaction and carbyl amine reaction.
Discussion
164.

The `1^(@)` amine which do not give an alcohol with `HNO_(2)` isA. `CH_(3)NH_(2)`B. `C_(2)H_(5)NH_(2)`C. `CH_(3)CH_(2)CH_(2)NH_(2)`D. None of these.

Answer» Correct Answer - A
Methylamine `(CH_(3)NH_(2))` on reaction with `HNO_(2)` does not give any alcohol.
Discussion
165.

Which of the following is produced by reaction of RCN in sodium and alcohol ?A. `RCONH_(2)`B. `RCO overset(-)(O) NH_(4)^(+)`C. `RCH_(2)NH_(2)`D. `R(CH_(2))_(3) NH_(2)`

Answer» Correct Answer - C
`R-C equiv N+4[H] overset(Na//C_(2)H_(5)OH)(rarr) RCH_(2)NH_(2)`
Discussion