Milk of Magnesia is a suspension of :
1). magnesium sulphate
2). magnesium carbonate
3). magnesium hydroxide
4). magnesium chloride
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2. Percentage of lead in lead pencils is
3. The element with highest first ionisation energy is
4. The advantage of detergents over soaps is
5. Question 16.20:How are synthetic detergents better than soap?
8. The material used in solar cells contains