Chemistry Worksheet-Class X (Carbon and its Compounds)

1. Rectified Spirit is  

          a)50%ethanol                                  b)80% ethanol

          c)95% ethanol                                 d)40 to 50 %

2.The byproduct in soap industry is 

          a)Isoprene                                       b)Ethylene glycol

          c)glycerol                                        d)butane

3.Write the structures of :

(i)Ethanoic acid                                     (ii) Hex anal

4.Which organic compound is added to make ethanol unfit for drinking purpose?

   What is the nature of the mixture formed?

5.Write a test to identify the presence of ethanoic acid.

6.Give names for the following 

   a)An aldehyde derived from ethane

   b)Ketone derived from butane

   c)Compound obtained by the oxidation of ethanol by chromic anhydride

7.What is meant by denatured alcohol?What is the need to denature alcohol?

8. (a)Name the gas evolved during the fermentation process.

    (b)What is the role played by yeast in the conversion of cane sugar (C₁₂H₂₂O₁₁₎  to ethanol?

    (c)How may the following be obtained from pure ethanol?Express chemical reactions by the chemical       equations   (i)Sodium ethoxide     (ii)Ethyl ethanoate     (iii)Ethanal