Safety & societal aspects in separation techniques — task. Science CBSE, Class 9 New.

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எங்கள் ஆசிரியர்களுடன் 1-ஆன்-1 ஆலோசனை நேரத்தைப் பெறுங்கள். டாப்பர் ஆவதற்கு நாங்கள் பயிற்சி அளிப்போம்

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Choose the correct answer:

1. Why should you always wear safety goggles during separation experiments?

To see the colours clearly
To protect eyes from splashes of chemicals
To look like a scientist
To avoid spilling liquids on the table

2. Who is Dilip Mahalanabis and what is his contribution to society?

An Indian scientist who promoted oral rehydration therapy
A scientist who discovered salt
A biologist who studied flowers
A chemist who invented pure water

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