Addition of gypsum to cement:  

Question: Addition of gypsum to cement:   (a) Reduces setting time of cement (b) Produces very light colour cement (c) Increases setting time of cement (d) Shining surface is formed

Washing soda is the common name for:

Question: Washing soda is the common name for: (a) Calcium Carbonate (b) Magnesium Carbonate (c) Sodium Carbonate (d) Potassium Carbonate Answer: (c) Sodium Carbonate

Which of the following is water gas?

Question: Which of the following is water gas? (a) Mixture of carbon monoxide and hydrogen (b) Mixture of carbon monoxide and nitrogen (c) Mixture of carbon dioxide and water vapour

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