Ozone is considered an important component in the stratosphere because $......$
- AIt prevents the formation of smog.
- BIt reacts with and removes toxic gases from the atmosphere.
- CIt absorbs ultraviolet radiation which is harmful to us.
- DIt destroys harmful bacteria.
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Dinitrogen is a robust compound,but reacts at high altitude to form oxides. The oxide of nitrogen that can damage plant leaves and retard photosynthesis is
Fill in the blanks:
$(1)$ Deficiency of fluoride is responsible for ............. .
$(2)$ The upper limit of lead concentration in drinking water is ............. .
$(3)$ The maximum limit of nitrate in drinking water is ............. .
$(4)$ ............. and ............. chemicals act as poisons for the nervous system.
$(1)$ Deficiency of fluoride is responsible for ............. .
$(2)$ The upper limit of lead concentration in drinking water is ............. .
$(3)$ The maximum limit of nitrate in drinking water is ............. .
$(4)$ ............. and ............. chemicals act as poisons for the nervous system.
Which of the following is a lung irritant?
Photochemical smog consists of an excessive amount of $X$ in addition to aldehydes,ketones,$PAN$,etc. $X$ is:
Easy
View SolutionMatch the following:
List-$I$ List-$II$ $A$. Insecticide $I$. $COD$ $B$. $K_2Cr_2O_7 / 50\% H_2SO_4$ $II$. $PAN$ $C$. Bleaching of clothes and paper $III$. $Na_3AsO_3$ $D$. Eye irritant $IV$. $BOD$ $V$. $H_2O_2$
The correct answer is:
| List-$I$ | List-$II$ |
|---|---|
| $A$. Insecticide | $I$. $COD$ |
| $B$. $K_2Cr_2O_7 / 50\% H_2SO_4$ | $II$. $PAN$ |
| $C$. Bleaching of clothes and paper | $III$. $Na_3AsO_3$ |
| $D$. Eye irritant | $IV$. $BOD$ |
| $V$. $H_2O_2$ |
The correct answer is:
DifficultAP EAMCET 2019
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