Question

6. How addition of undesirable substances and change in temperature affect the water life.

Answer 1

Answer:

Majority of the water life comprises of fishes

fishes don't have lungs so they simply breathe through their gills by taking the oxygen rich water in.

now suppose if you add some HCl in the water

that HCL will be mixed with water and fish will take that water in

now that HCl will definately hurt fish's respiratory track and its gills  thus that fish will eventually die

what could be worse?

suppose if you eat that fish

you will face pelvic ulser and many other painful diseases

and change in temperature decreases the solubility of oxygen in water which makes it hard for the fishes to extract oxygen from the water.

hope this helped you

Answer 2

Answer:

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