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Class 9 Science Exploration: Entering the World of Secondary Science Hypothesis and experimentationEasy

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Why is it necessary to wash hands after an experiment?

Answer and explanation

Correct answer: To remove residues of harmful substances

Washing hands removes residues of chemicals or microorganisms. In exams remember cleaning after experiments.

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Hand Washing Laboratory Safety Hygiene Hypothesis And Experimentation Exploration: Entering The World Of Secondary Science Exploration Entering The World Of Secondary Science Science Class 9 Mcq

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