Q.19 Nancy a class-VII student was performing an experiment in the Chemistry lab. Herteacher instructed her1) Not to waste/smell chemicals2) Not to dispose off all chemicals in the sink.3) Not to mix chemicals haphazardly for example, never add water to acid todilute it; always add acid slowly to water.Why did the teacher advice Nancy to follow the above safety measures?HOTS QUESTIONSQ.1 If you get Turmeric stain on your clothes while eating food, and try to wash it off withsoap, the stain becomes red. Why? Find out how to remove haldi stains from clothes.Q.2 Is the meaning of weak acid the same as that of dilute acid?Q.3 The waste of many factories contain acids. Why is it considered necessary toneutralize them before allowing the waste to flow into water bodies.?
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when acid is added slowly to water it become neutralized.if it not then it will get heated or explosion
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