The smog is essentially caused by the presence of
A). O3 and N2
B). O2 and N2
C). Oxides of N and S
D). O2 and O3
Oxides of N and S
Photochemical smog is caused by oxides of sulphur and nitrogen.
1. Which of the following constitute to form a gene?
2. The National Chemical Laboratoly (India) is located in
3. An electric iron has a heating element made of:
4. The most suitable unit for expressing nuclear radius is :
7. ___________gives hardness to stainless steel.
10. Sodium vapour lamps glow with yellow colour. This is due to