TNPSC Chemistry Study Material & Notes in English
| 1. |
First atomic model was proposed by |
| |
- A. De Broglie
- B. John Dalton
- C. E.Rutherford
- D. Mendeleef
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| 2. |
The catalyst used in the preparation of NH3 by Haber's process is |
| |
- A. Iron
- B. Platinum
- C. Sunlight
- D. Manganese dioxide
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| 3. |
The chemical name for vitamin c is |
| |
- A. Ascorbic acid
- B. Salicyclic acid
- C. Crotonic acid
- D. Benzoic acid
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| 4. |
What is the most common soil in sea water? |
| |
- A. Calcium carbonate
- B. Potassium chloride
- C. Sodium chloride
- D. Magnesium sulphate
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