Which of the option shows following examle in ascending ordr in terms f BOD
(i) Distilled water
(ii) Tap water
(iii) Sewage wastes drained in river

Which of the option shows following examples in ascending order in terms of BOD? i) Distilled water ii) Tap water iii) Sewage wastes drained in river (A) i- ii - iii (B) ii- i- iii (C) iii- i- ii (D) iii- ii- i

Which of the following will have the minimum "BOD (A) Sea water (B) Potable water (Drinking water) (C) Polluted water (D) Sewage

Classify the following substances into element, compound and mixture. (i) Brass (ii) Distilled water

Classify the following substances into element, compound and mixture. (i) Brass (ii) Distilled water

Arrange the following options in ascending order of their BOD value. (i) Sample of highly polluted pond water. (ii) Sample from unpolluted pond water. (iii) Distilled water. (A) iii to i to ii (B) ii to iii to i (C) iii to ii to i (D) i to iii to ii

Which of the following are not the liquid forms of water? (i) Snow (ii) Lake water (iii) River water (iv) Water vapour (v) Ice Choose the correct combination from the options below.

A water body characterized by nutrient rich water supports abundant growth of phytoplanktons and other water plants on its surface. Over time, the water body gets filled with a large number of such plants and the process is called Eutrophication. In such water bodies, dissolved oxygen content is nil or very less. Which of the following steps are used to treat industrial wastes and reduce pollution? (i) Recycle the wastes (ii) Discharge the wastes into the sea (iii) Treat and neutralise harmful chemicals in the wastes

Which of the following is True/false The lower the BOD of waste water more is its polluting potential

Which of the following is True/false The lower the BOD of waste water more is its polluting potential