Question

3.What precautions should be taken while performing above experiment?*

A low resistance rheostat must be used.

Allow the current to flow in the resistance of wire for a long time.

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Answer 1

Answer:

1. Do not touch or taste any unknown substance.
2. Use only small quantity of chemical to carry out experiment.
3. Do not work alone in the laboratory.
4. Do not throw hot concentrated acids into the sink directly.
5. Always wear an apron in the laboratory to protect your clothes.