HSC Science इयत्ता १२ - Tamil Nadu Board of Secondary Education Question Bank Solutions for Chemistry

Write a short note on the following.

Carbylamine reaction

Write a short note on the following.

Mustard oil reaction

How will you distinguish between primary secondary and tertiary aliphatic amines?

Account for the following.

pK_b of aniline is more than that of methylamine.

Account for the following.

Gabriel phthalimide synthesis is preferred for synthesising primary amines.

Account for the following.

Ethylamine is soluble in water whereas aniline is not.

Account for the following.

Although amino group is o- and p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.

Arrange the following:

In increasing order of solubility in water:

C₆H₅NH₂, (C₂H₅)₂NH, C₂H₅NH₂

Arrange the following.

In decreasing order of basic strength in gas phase (C₂H₅)NH₂, (C₂H₅)NH, (C₂H₅)₃N and NH₃.

Arrange the following.

In increasing order of boiling point C₆H₅OH, (CH₃)₂NH, C₂H₅NH₂.

Arrange the following.

In decreasing order of the pK_b values C₂H₅NH₂, C₆H₅NHCH₃, (C₂H)₂NH and CH₃NH₂.

Arrange the following.

Increasing order of basic strength C₆H₅NH₂, C₆H₅N(CH₃)₂, (C₂H₅)₂NH and CH₃NH₂.

Arrange the following.

In decreasing order of basic strength

How will you prepare propan-1-amine from butane nitrile?

How will you prepare propan-1-amine from propanamide?

How will you prepare propan-1-amine from 1-nitropropane?

Identify A, B and C.

\[\ce{CH3 - NO2 ->[LiAlH4] A ->[2CH3CH2Br] B ->[H2SO4] C}\]

How will you convert diethylamine into N, N-diethyl acetamide?

How will you convert diethylamine into N-nitrosodiethylamine?

The central dogma of molecular genetics states that the genetic information flows from: