For your agricultural field or garden you have developed a compost producing pit. Discuss process in

English

Gujarati

Hindi

Environmental Study

normal

For your agricultural field or garden you have developed a compost producing pit. Discuss the process in the light of bad odour, flies and recycling of wastes for a good produce.

Option A

Option B

Option C

Option D

Solution

Compost seals to protect man from bad smell proper fitness is needed. Keeping it covered keeps it in its scalp these who can be recycled should be brought who can be recyeled should be brought back to the industry for reproduction.

Standard 11

Chemistry

What efforts are being made by the government to save the Taj Mahal ?

medium

Write two uses of $PCBs$.

easy

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.

easy

(NEET-2021)

Fill in the Blanks :

$(1)$ The substance that spreading pollution is called …….

$(2)$ The fullform $DDT$ is …….

$(3)$ The area of $10\, km$ to $50\, km$ from the sea level is called ………

$(4)$ Harmful ultraviolet sun radiation come to the earth is blocked by …..

hard

Summarize the quantities and differentiated quantities of different metals and ions at the international level of drinking water.