Question

Give a reason for taking each of the following precautions in the laboratory:
1. A large piece of sodium metal is not dropped into a beaker of water.
2. Water is not added to concentrated sulphuric acid 3. Unknown gas is not smelled with the nostrils close to the mouth of the test tube containing the gas.
4. Food is not eaten in the laboratory

Answer 1

Answer:

1)Na will react explosively in water

2)sulphuric acid reacts with water so they are diluted in other ways

3)some gases can be very dangerous

4)food can get mixed with other compounds which is dangerous

Explanation: