What is the most common salt in sea water ?
1). Calcium carbonate
2). Potassium chloride
3). Sodium chloride
4). Magnesium sulphate
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1. Which of the following metals causes ItaiItal disease ?
2. Which of the following is the petroleum wax ?
3. Dry ice is the solid form of :
4. Which of the following gases is present under pressure in soft drinks
5. The metal that is used as a catalyst in the hydrogenation of oils is
6. Metal are good conductors because
7. Which of the following fibres catches fire least ?
8. The influence of temperature on reaction rate is predicted by
9. Question 1.11:Name the parameters that characterize a unit cell.