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What Are Amines? - Chemistry

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प्रश्न

What are amines?

एक पंक्ति में उत्तर
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उत्तर

Amines are the organic derivatives of ammonia in which one, two or all the three hydrogens atoms attached to nitrogen are replaced by equivalent number of same or diferent alkyl or aryl group.

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2018-2019 (March) Set 1

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

Acetaldehyde, when treated with which among the following reagents does NOT undergo addition reaction?

(A) Ammonia

(B) Hydroxylamine

(C) Ammoniacal silver nitrate

(D) Semicarbazide


Write balanced chemical equations for action of ammonia on - formaldehyde


Arrange the following compound in increasing order of its reactivity in nucleophilic addition reactions.

Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Hint: Consider steric effect and electronic effect.


Predict the product of the following reaction:


What is meant by the following term? Give an example of the reaction in the following case.

Semicarbazone


What is meant by the following term? Give an example of the reaction in the following case.

Hemiacetal


What is meant by the following term? Give an example of the reaction in the following case.

Ketal


How will you bring about the following conversion in not more than two steps?

Bromobenzene to 1-Phenylethanol


Complete the synthesis by giving missing starting material, reagent or product.

\[\ce{C6H5CHO ->[H2NCONHNH2]}\]


Explain the mechanism of alkaline hydrolysis of tert-butyl bromide with energy profile diagram.


How are the following compounds prepared?

acetophenone from benzene


Write balanced chemical equations for action of ammonia on - acetone


How will you convert sodium acetate to methane?


Write a test to differentiate between pentan-2-one and pentan-3-one.


The pH of blood does not appreciably change by a small addition of acid or base because


Which one of the following gives only one monochloro derivative?


Acetaldehyde and acetone differ in their reaction with


Which will undergo faster nucleophilic addition reaction?

Acetaldehyde or Propanone


In the following reaction

\[\ce{Carbonyl compound + MeOH <=>[HCl] acetal}\]

Rate of the reaction is the highest for ______.


The following questions are case-based questions. Read the passage carefully and answer the questions that follow:

The carbon-oxygen double bond is polarised in aldehydes and ketones due to higher electronegativity of oxygen relative to carbon. Therefore, they undergo nucleophilic addition reactions with a number of nucleophiles such as HCN, NaHSO3, alcohols, ammonia derivatives and Grignard reagents. Aldehydes are easily oxidised by mild oxidising agents as compared to ketones. The carbonyl group of carboxylic acid does not give reactions of aldehydes and ketones. Carboxylic acids are considerably more acidic than alcohols and most of simple phenols.

Answer the following:

(a) Write the name of the product when an aldehyde reacts with excess alcohol in the presence of dry HCl. (1)

(b) Why carboxylic acid is a stronger acid than phenol? (1)

(c) (i) Arrange the following compounds in increasing order of their reactivity towards CH3MgBr: (1)

CH3CHO, \[\begin{array}{cc}
\ce{(CH3)3C-C-CH3}\\
\phantom{....}||\\
\phantom{....}\ce{O}
\end{array}\],  \[\begin{array}{cc}
\ce{CH3-C-CH3}\\
||\\
\ce{O}
\end{array}\]

(ii) Write a chemical test to distinguish between propanal and propanone. (1)

OR

(c) Write the main product in the following: (2)

(i)
(ii)

Draw structure of the following derivative.

Acetaldehydedimethylacetal


Draw the structure of the following derivative.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative:

Acetaldehydedimethylacetal


Draw structure of the following derivative.

The ethylene ketal of hexan-3-one


Draw structure of the following derivative.

The ethylene ketal of hexan-3-one


Give an example of the reaction in the following case.

Oxime


Give an example of the reaction in the following case.

Imine


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