Q9 of 33 Page 225

i) Identify A & B.


ii) Convert ethanol into power alcohol. Mention one of its uses.


iii) What should be added to obtain denatured spirit?


iv) Give one use of denatured spirit.


i) A is methylated spirit which is a mixture of 95% of ethanol and 5% of methanol.


B is rectified spirit which is a mixture of 95.5% of ethanol and 4.5% of water.


ii) By adding petrol to ethanol, we can get power alcohol.


Power alcohol is used in automobiles. It acts as best fuel for automobiles.


iii) Pyridine should be added to obtained denatured spirit. This makes alcohol unfit for drinking.


iv) Denatured spirit is used as a solvent and a fuel.


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7

Complete the following table:

 8

Ethanoic acid is a member of Homologous series with general formula

CnH2n+1 COOH.


i) Name the series and give its functional group.


ii) Give the molecular formula and the common name of ethanoic acid.


iii) If this compound is mixed with ethanol in the presence of Conc.H2SO4, a sweet smelling compound is formed. Give the equation and name the compound.


iv) Ethanoic acid reacts with carbonates. Which gas is liberated during this reaction?


v) Write the balanced equation for the reaction of ethanoic acid with carbonate.


vi) Your grandmother has prepared mango pickle. What has she added to preserve it for a long time?


 10

Write a balanced equation using the correct symbols for these chemical reactions:

i) Action of hydrogen on ethene in the presence of nickel catalyst.


ii) Combustion of methane evolving carbondioxide and water.


iii) Dehydrogenation of ethanol.


iv) Decarboxylation of Sodium salt of ethanoic acid.


 11

Look at the picture and identify what happens. Support your answer with equations.

i) How is B formed from A?



ii) What happens when acetic acid is treated with carbonate salt. Name the gas produced. What happens when this gas is treated with lime water?



iii) What happens when acetic acid is treated with ethanol in the presence of concentrated H2SO4? Give the equation.