Ozone consists of
A). Oxygen only
B). Oxygen and Nitrogen
C). Hydrogen and Carbon
D). Oxygen and Carbon
Oxygen only
Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere).
1. Which among the following is pure matter ?
2. Question 10.13:Give the uses of freon 12, DDT, carbon tetrachloride and iodoform.
3. Percentage of carbon in steel i ranges from
4. Name the acid present in lemon.
5. Which of the following metals is not a pollutant ?
7. Which halide is used in making sensitive emulsion on photograhic film?
8. The constituents of automobile exhaust that can cause cancer is/are :