Describe the classification of organic compounds based on their structure.

Write a note on homologous series.

Write the molecular and possible structural formula of the first four members of homologous series of carboxylic acids.

Describe the reactions involved in the detection of nitrogen in an organic compound by Lassaigne method.

Briefly explain geometrical isomerism in alkene by considering 2- butene as an example.

0.30 g of a substance gives 0.88 g of carbon dioxide and 0.54 g of water calculate the percentage of carbon and hydrogen in it.

The ammonia evolved form 0.20 g of an organic compound by kjeldahl method neutralised 15ml of N/20 sulphare acid solution. Calculate the percentage of Nitrogen.

How many sigma and pi bonds are present in
(i) \({ CH }_{ 3 }-C\equiv N\)
(ii) \({ CH }_{ 3 }=C=N?\)

What is the type of hybridisation of each carbon in the following compounds?
(i) CH₃ - CH₃
(ii) (CH₃)₂ Co

Indicate the \(\sigma \& \pi \) bonds in
(i) CH₂ CI₂
(ii) \({ CH }_{ 3 }-C\equiv C-C-{ CH }_{ 3 }\)

Which of the following represents the correct IUPAC name for the compounds concerned?
(i) 2,2-dimethylpentane or 2-dimethylpentane.
(ii) 2,4,7-trimethyloctane or, 2,5,7-trimethyloctane.
(iii) 2-chlor0-4-methylpentane or 4-chloro-2. methylpentane.
(iv) But-3-yn-I-01 or But-4-0I-1-yne

Define optical isomerism.

Distinguish between dextrarotatory and lavorotatory compounds.

Denote the methods employed for the purification of solid and liquid organic compounds.

In steam distillation why does an organic liquid  vapourises at a temperature lower than its boiling point?