chapter 4 carbon and its compound dec 2015 | Page 12

9.

Would you be able to check if water is soft by using a soap?

10.

Write the molecular formula of an alkyne containing 10 atoms of hydrogen.

2 MARKS
1. Define saponification. Write a chemical equation for it.
2. Covalent compounds generally don't conduct electricity. Why?
3.

Specify the condition in which ethanol undergo oxidation to form ethanoic
acid. Write the chemical equation.

4.

Define isomerism. Draw the structures of the two isomers of butane.

5.

Identify the functional group present in the following compounds: HCOOH,
HCHO, CH3Br and C10H21OH

3 MARKS
1.

What is a homologous series? Write any two characteristic features of any
homologous series using one example.

2.

Write any three differences between soaps and detergents.

5 MARKS
1.

Differentiate between ethanol and ethanoic acid on the basis of any three
physical properties and two chemical properties.

2.

An organic compound 'A' is used as a preservative in pickles and has molecular
formula C2H4O2. This compound reacts with ethanol to form a sweet smelling
compound 'B'.
i)

Determine the compound 'A'.

ii)

Write the chemical equation for its reaction with ethanol to form
compound 'B'.

iii)

Write any two uses of compound 'B'.

iv)

Which gas is produced when compound 'A' reacts with washing soda?
Write the chemical equation

v)

How can vinegar be obtained from compound 'A'?

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