COD is measure the capacity of water to consume oxygen during …………….
a) decomposition of organic matter
b) oxidation of inorganic matter
c) both a & b
d) none of these
………… are inorganic chemicals.
a) Ammonia
b) Nitrate
c) both a & b
d) none of these
Household Wastes:-
When household water enters the water bodies such as streams, canals etc. it cause.…
a) water pollution
b) noise pollution
c) air pollution
d) all of these
Household wastes remains in water in.……… for long time and affect the aquatic life.
a) dissolve form
b) suspension form
c) solved form
d) both a & b
Household wastes can be broadly divides into …………categories.
a) two
b) three
c) four
d) five
