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1. use test tube holder while performing the experiment.
2. use less acids for less heat evolution.
3. keep the test tube at a distance so that if the acid comes out it won't harm you and even the chocking smell.
1 5 1
You should use so u should use test tube holder while performing this experiment   u should pour less acid for less heat you should keep hand at a distance so that it doesn't harm u
3 5 3
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