What is green chemistry?
- A$A$ branch of chemistry that focuses on the production of chemicals using toxic reagents.
- B$A$ design of chemical products and processes that reduce or eliminate the use and generation of hazardous substances.
- CThe study of chemical reactions occurring specifically in plant life.
- D$A$ method of using chemical fertilizers to increase crop yield.
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Have you ever observed any water pollution in your area? What measures would you suggest to control it?
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$(1)$ $A$ special cloud is formed over the Antarctica region in winter,which is called ..............
$(2)$ $A$ known source of pollution is called ..............
$(3)$ An unknown source of pollution is called ..............
$(4)$ The concentration of dissolved oxygen in water is ......... and the concentration of dissolved oxygen in air is ............
$(1)$ $A$ special cloud is formed over the Antarctica region in winter,which is called ..............
$(2)$ $A$ known source of pollution is called ..............
$(3)$ An unknown source of pollution is called ..............
$(4)$ The concentration of dissolved oxygen in water is ......... and the concentration of dissolved oxygen in air is ............
What are $X$ and $Y$ in the following reaction?
$CF_2Cl_2 \stackrel{UV}{\longrightarrow} X + Y$
$CF_2Cl_2 \stackrel{UV}{\longrightarrow} X + Y$
Which of the following is one of the products of the ozonolysis of CFCs in the ozone layer in the atmosphere?
Soil containing both $Al$ and $Fe$ is called
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