Consider the following observation.
(I) `pH` or rain water is `5.6`
(II) Amount of `CO_(2)` in the atmosphere is `0.03%`
(III) Biochemical oxygen demand is 10 ppm
(IV) Eutrophication

Which of the following is/are polluted? (a) Rain water, with pH 5.6 (b) The atmosphere contains 0.03 % CO_(2) (c) River water with a COD value 10 ppm (d) Pond water with phenomenon of eutrophication. The correct answer is

Show the following on number lines. i) 7/6 , ii) 5/2 iii) 7/5 iv) 9/6

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Name two main acids present in acid rain. From where do these acids come in acid rain ?

Rearrange the following (I to IV) in the order of increasing masses : (I) 0.5 mole of O_(3)" "(II) 0.5 gm atom of oxygen (III) 3.011 xx 10^(23) molecules of O_(2) " " (IV) 5.6 litre of CO_(2) at STP

Rearrange the following (I to IV) in the order of increasing masses : (I) 0.5 mole of O_(3)" "(II) 0.5 gm atom of oxygen (III) 3.011 xx 10^(23) molecules of O_(2) " " (IV) 5.6 litre of CO_(2) at STP

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. What is PAN?

Carbon dioxide is an essential component of atmosphere. However, when the concentration of CO_2 increases in the atmosphere, it can lead to global warming through green house effect. Similarly, rain water is an essential source of water. It has pH of 5.6 due to the formation of H^+ ions from the reaction of rain water with CO_2 present in the atmosphere. When pH of the rain water falls below 5.6 due to the presence of acids in the atmosphere, it has very damaging effects. Why does the rain water normally have a pH of about 5.6 ?

(A): The pH of normal rain is 5.6. (R) CO_2 present in atmosphere absorbed in moisture to give H^+ and HCO_(3)^(-)