Which of the following gases is present under pressure in soft drinks
1). Oxygen
2). Nitrogen
3). Carbon dioxide
4). Nitrous oxide
2. Question 7.20:Which aerosols deplete ozone?
3. The most commonly used chemicals in the artificial rainmaking or cloud seeding are
4. Byproduct obtained by soap industry is
6. Commercial nitric acid is coloured because it contains dissolved :
7. Spontaneous change is one in which there is:
8. Which one of the following is not a greenhouse gas ?