TNPSC Chemistry Study Material & Notes in English
| 9. |
One of the gases polluting air is |
| |
- A. Sulphur dioxide
- B. Nitrogen
- C. Oxygen
- D. Hydrogen
|
| 10. |
The acid present in stomach juice is |
| |
- A. Citric acid
- B. Tartaric acid
- C. Lactic acid
- D. Hydrochloric acid
|
| 11. |
The reaction between an organic acid and an alcohol is called |
| |
- A. Reduction
- B. Hydrolysis
- C. Ozonalysis
- D. Esterification
|
| 12. |
The colouring agent used in the preparation of brown coloured glass is |
| |
- A. Ferric oxide
- B. Chromic oxide
- C. Cobalt oxide
- D. Manganese dioxide
|
