Chemistry
What is the maximum Water Vapour content in the atmosphere?

4 to 5 per cent
5 to 6 per cent
2 to 3 per cent
3 to 4 per cent

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Chemistry
The main use of salt in the diet is to

ease the process of cooking
produce in small amounts the hydrochloric acid required for the digestion of food
increase the solubility of food particles in water
make the taste of food better

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