Question

Tick the correct options

3. Human faeces and animal wastes are ________ impurities.

Options

(a) organic (b) physical (c) inorganic (d) chemical

4. Which of the following diseases is not caused by stagnant sewage?

Options

(a) diarrhoea (b) malaria
(c) cholera (d) common cold

5. An underground water pipe which carries away dirty wastewater is called a _______ .

Options

(a) sewage (b) sewer (c) manhole (d) sewerage​

Answer 1

Answer:

3. Human faeces and animal wastes are organic impurities.

Answer 2

Answer:

organic

common cold

..