Subject Experts Solutions for Exercise 1: SELF-ASSESSMENT TEST

Complete the following chemical equation:

${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}\underset{443\mathrm{K}}{\overset{\mathrm{Conc}. {\mathrm{H}}_2{\mathrm{SO}}_4}{\to }}$

Complete the following chemical equation:

${\mathrm{CH}}_3\mathrm{COOH}+{\mathrm{NaHCO}}_3\to$

 Name the products obtained on complete combustion of hydrocarbons? How is the gas evolved during combustion tested in the laboratory? Explain in brief.
 

Write the next higher homologue of: (a) ${\mathrm{C}}_3{\mathrm{H}}_6$ (b) ${\mathrm{C}}_5{\mathrm{H}}_8$

What is meant by "structural isomers"? Give reason why propane (${\mathrm{C}}_3{\mathrm{H}}_8$) cannot exhibit this characteristic. Draw the structures of possible isomers of butane (${\mathrm{C}}_4{\mathrm{H}}_{10}$).

 What are hydrocarbons? Distinguish alkanes from alkenes and each of them from alkynes, giving one example of each. Draw the structure of each compound cited as example of justify your answer.

You have three unlabelled test tubes containing ethanol, ethanoic acid and soap solution. Explain the method you would use to identify the compounds in different test tubes by chemical tests using litmus paper and sodium metal.

Give the reason of formation of scum when soaps are used with hard water.