What are pesticides and herbicides? Explain giving examples.
What are pesticides and herbicides? Explain giving examples.
Pesticides are a mixture of two or more substances. They are used for killing pests. Pests include insects, plant pathogens, weeds, mollusks, etc., that destroy the plant crop and spread diseases. Aldrin and dieldrin are the names of some common pesticides
Herbicides are pesticides specially meant for killing weeds. For example, sodium chlorate $\left( NAClO _{3}\right),$ sodium arsenite $\left( Na _{3} AsO _{3}\right),$ etc.
Similar Questions
From where the biodegradeble wastes are generated ?
From where the biodegradeble wastes are generated ?
What is green house effect ?
What is green house effect ?
Match List$-I$ with List$-II$
List$-I$
List$-II$
$(a)$ $2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow$ $2 \mathrm{SO}_{3}(\mathrm{~g})$
$(i)$ Acid rain
$(b)$ $\mathrm{HOCl}(\mathrm{g}) \stackrel{\mathrm{h} \nu}{\longrightarrow}$
$\dot{\mathrm{O}} \mathrm{H}+\dot{\mathrm{Cl}}$
$(ii)$ Smog
$(c)$ $\mathrm{CaCO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow$
$\mathrm{CaSO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}$
$(iii)$ Ozone depletion
$(d)$ $\mathrm{NO}_{2}(\mathrm{~g}) \stackrel{\mathrm{h} v}{\longrightarrow}$
$\mathrm{NO}(\mathrm{g})+\mathrm{O}(\mathrm{g})$
$(iv)$ Tropospheric pollution
Choose the correct answer from the options given below.
Match List$-I$ with List$-II$
| List$-I$ | List$-II$ |
| $(a)$ $2 \mathrm{SO}_{2}(\mathrm{~g})+\mathrm{O}_{2}(\mathrm{~g}) \rightarrow$ $2 \mathrm{SO}_{3}(\mathrm{~g})$ | $(i)$ Acid rain |
|
$(b)$ $\mathrm{HOCl}(\mathrm{g}) \stackrel{\mathrm{h} \nu}{\longrightarrow}$ $\dot{\mathrm{O}} \mathrm{H}+\dot{\mathrm{Cl}}$ |
$(ii)$ Smog |
|
$(c)$ $\mathrm{CaCO}_{3}+\mathrm{H}_{2} \mathrm{SO}_{4} \rightarrow$ $\mathrm{CaSO}_{4}+\mathrm{H}_{2} \mathrm{O}+\mathrm{CO}_{2}$ |
$(iii)$ Ozone depletion |
|
$(d)$ $\mathrm{NO}_{2}(\mathrm{~g}) \stackrel{\mathrm{h} v}{\longrightarrow}$ $\mathrm{NO}(\mathrm{g})+\mathrm{O}(\mathrm{g})$ |
$(iv)$ Tropospheric pollution |
Choose the correct answer from the options given below.
- [NEET 2021]
Mention the main causes for water pollution.
Mention the main causes for water pollution.
Have you ever observed any water pollution in your area? What measures would you suggest to control it?
Have you ever observed any water pollution in your area? What measures would you suggest to control it?