Recent questions tagged ch-13

Describe a method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.

asked Dec 29, 2016 by sharmaaparna1

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How will you convert: (i) Ethanoic acid into methanamine (ii) Hexanenitrile into 1-aminopentane (iii) Methanol to ethanoic acid

asked Dec 29, 2016 by sharmaaparna1

1 answer

State reasons for the following : (i) $pKb$ value for aniline is more than that for methylamine. (ii) Ethylamine is soluble in water whereas aniline is not soluble in water. (iii) Primary amines have higher boiling points than tertiary amines.

asked Nov 28, 2016 by meena.p

1 answer

How is the basic strength of aromatic amines affected by the presence of an electron releasing group on the benzene ring ?

asked Nov 23, 2016 by meena.p

1 answer

Arrange the following (i) In decreasing order of basic strength in gas phase : $C_2H_5NH_2, (C_2H_5)_2NH, (C_2H_5)_3 N$ and $NH_3$ (ii) In increasing order of boiling point : $C_2H_5OH, (CH_3)_2NH,C_2H_5NH_2$

asked Nov 22, 2016 by meena.p

1 answer

Why is aniline soluble in aqueous HCl?

asked Nov 17, 2016 by meena.p

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An aromatic compound $(A)$ on treatment with ammonia followed by heating forms compound $(B)$, which on heating with $Br_2$ and $KOH$ forms a compound $(C)$ having molecular formula $C_6H_7N$. Give the structures of $A, B$ and $C$ and write the reactions involved.

asked Nov 16, 2016 by meena.p

1 answer

Why do amines act as nucleophiles ?

asked Nov 14, 2016 by meena.p

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Write the following conversions : $(i) nitrobenzene \to acetanilide \\ (ii) acetanilide \to p-nitroanilne$

asked Nov 11, 2016 by meena.p

1 answer

How do you explain the presence of an aldehydic group in a glucose molecule ?

asked Nov 7, 2016 by meena.p

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The structural feature that distinguishes proline from other amino acids are

asked Dec 15, 2015 by meena.p

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Nitration of aniline also gives M- nitro aniline in strong acidic medium because

asked Dec 15, 2015 by meena.p

1 answer

Among the following the weakest base is

asked Dec 15, 2015 by meena.p

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Which of the following will give carbylamine test ?

asked Dec 15, 2015 by meena.p

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Reaction of aniline with $HNO_2$ followed by treatment of dilute acid gives

asked Dec 15, 2015 by meena.p

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Best method to form aromatic iodide is

asked Dec 15, 2015 by meena.p

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The compound which on reaction with aqueous nitrous acid at low temperature produces an aity nitroso amine is

asked Dec 15, 2015 by meena.p

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Which of the following statement is true?

asked Dec 15, 2015 by meena.p

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Which of the following amines will not given gas on treatment with nitrous acid $NaNO_2+HCl$?

asked Dec 15, 2015 by meena.p

1 answer

Nitrobenzene on treatment with zinc dust aqueous ammonium chloride gives

asked Dec 15, 2015 by meena.p

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$C_6H_5CONHCH_3$ can be converted into $C_6H_5 CH_2NHCH_3$ by ?

asked Dec 14, 2015 by meena.p

1 answer

Among the following which one does not act as an intermediate in Hofmann rearrangement

asked Dec 14, 2015 by meena.p

1 answer

Which one of the following methods is neither meant for the synthesis nor for separation of amines

asked Dec 14, 2015 by meena.p

1 answer

Nitrobenzene $(PhNO_2) \underrightarrow{Zn+NH_4Cl} p.p $ will be

asked Dec 14, 2015 by meena.p

1 answer

Which of the following does not give nitroalkane?

asked Dec 14, 2015 by meena.p

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Cyanogen gas is obtained in the reaction

asked Dec 14, 2015 by meena.p

1 answer

Which of the following reaction does not yield a amine:

asked Dec 14, 2015 by meena.p

1 answer

Melting points are normally the highest for

asked Dec 14, 2015 by meena.p

1 answer

Aromatic nitnites (Arcn) are not prepared by reaction :

asked Dec 14, 2015 by meena.p

1 answer

Among the following the dissociation constant is highest for

asked Dec 14, 2015 by meena.p

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Nitrobenzene gives N-Phenylthyol- roxylamine by

asked Dec 14, 2015 by meena.p

1 answer

Among the following the weakest base is

asked Dec 14, 2015 by meena.p

1 answer

Acetamide and ethylamine can be distinguished by reacting with

asked Dec 14, 2015 by meena.p

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The reaction of primary amine with chloroform and ethanolic $KOH,$ is called

asked Dec 14, 2015 by meena.p

1 answer

Acetamine is treated separately with the following reagent. Which one of these would give methylamine .

asked Dec 14, 2015 by meena.p

0 answers

Nitrosoamines $(R-N-N=0)$ are soluble in water on heating them with concentrated $H_2SO_4$ they give secondary amines This reaction is called

asked Dec 14, 2015 by meena.p

1 answer

Reaction of nitrous acid with aliphatic primary amine will give

asked Dec 14, 2015 by meena.p

1 answer

In the presence of an acid , hydrolysis of methyl cyanide produces

asked Dec 14, 2015 by meena.p

1 answer

In the presence of an acid , hydrolysis of methyl cyanide produces

asked Dec 14, 2015 by meena.p

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On heating benzyl amine with chloroform and ethandic KOH , product Obtained is

asked Dec 14, 2015 by meena.p

1 answer

Amongest the following the most basic compound is

asked Dec 14, 2015 by meena.p

1 answer

Which one of the following methods is neither meant for the synthesis nor for separation of amines ?

asked Dec 14, 2015 by meena.p

1 answer

Flurobenzence $(C_6H_5F)$ can be synthesized in the laboratory

asked Dec 14, 2015 by meena.p

1 answer

In the chemical reaction $CH_3CH_2NH_2+CHCl_3 +3KOH \to (A)+(B)+3H_2O$ the compounds (A) and (B) are respectively

asked Dec 12, 2015 by meena.p

1 answer

Which one of the following is the strongest base in aqueous solution ?

asked Dec 12, 2015 by meena.p

1 answer

Flurobenzene and Phenal

asked Dec 12, 2015 by meena.p

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Which of the following is more basic than aniline ?

asked Dec 12, 2015 by meena.p

1 answer

Electrolytic reduction of nitrobenzene is weakly acidic medium gives,

asked Dec 12, 2015 by meena.p

1 answer

Intermediates formed during reaction of $RCNH_2$ with $Br_2$ and $KOH$ are

asked Dec 12, 2015 by meena.p

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Intermediates formed during reaction of $RCNH_2$ with $Br_2$ and $KOH$ are

asked Dec 12, 2015 by meena.p

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