Which of the following statements is incorrect?
- APolar stratospheric clouds $(PSCs)$ are clouds formed over Antarctica.
- BAcid rain dissolves heavy metals such as $Cu, Pb, Hg$ and $Al$ from soil,rocks and sediments.
- C$H_2SO_4$ is the major contributor to acid rain,$HNO_3$ ranks second and $HCl$ third in this respect.
- DFishes grow equally well in warm and cold water.
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The chemical entities present in the thermosphere of the atmosphere are
Match the pollutant in List-$I$ with its maximum permissible limit in drinking water given in List-$II$.
List-$I$ List-$II$ $(A)$ Lead $(I)$ $500 \text{ ppm}$ $(B)$ Sulphate $(II)$ $50 \text{ ppm}$ $(C)$ Nitrate $(III)$ $50 \text{ ppb}$
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ Lead | $(I)$ $500 \text{ ppm}$ |
| $(B)$ Sulphate | $(II)$ $50 \text{ ppm}$ |
| $(C)$ Nitrate | $(III)$ $50 \text{ ppb}$ |
The acceptable level of carbon monoxide gas $(CO)$ in the atmosphere in $ppm$ level is
Water filled in two glasses $A$ and $B$ have $BOD$ values of $10$ and $20$ respectively. The correct statement regarding them is:
DifficultJEE MAIN 2019
View SolutionIn environmental chemistry,the medium which is affected by a pollutant is called the
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