Given below are two statements :
Statement-I : If BOD is $4ppm$ and dissolved oxygen is $8ppm$ , then it is a good quality water.
Statement-II : If the concentration of zinc and nitrate salts are $5ppm$ each, then it can be a good quality water.
In the light of the above statements, choose the most appropriate answer from the options given below :

Question

Given below are two statements :

Statement-I : If BOD is $4ppm$ and dissolved oxygen is $8ppm$ , then it is a good quality water.

Statement-II : If the concentration of zinc and nitrate salts are $5ppm$ each, then it can be a good quality water.

In the light of the above statements, choose the most appropriate answer from the options given below :

Quantrex Academy · Accepted Answer

Correct answer: D. Both the statements I and II are correct

Drinking water has a BOD level of 1 - 2ppm . When the BOD value of water is in the range 3 - 5ppm , the water is moderately clean. Polluted water has a BOD value in the range of 6 - 9ppm . Healthy water should generally have dissolved oxygen concentrations above 6 . 5 - 8mg / L Drinking water with concentrations of nitrate (measured as nitrate-nitrogen) below 10mg of nitrate per liter of water ( mg / L ) is considered safe. Permissible limit of Zn in potable water is 5ppm .

Given below are two statements : Statement-I : If BOD is 4ppm and...

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