Think before you answer — task. Science CBSE, Class 7.

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

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I) Emma placed some wet blue litmus papers for drying in sunlight. Suddenly, rain started. She was shocked to see there are no blue litmus papers. They were red. What do you think may happen there?

Acid rain may changed blue to red
She is lying. She placed red litmus only
Blue litmus will turn into red after drying
Rain water will always turn blue to red

II) Hendry is thinking about a chemical which is used to check whether a solution is acid or base. They are indicators. Which of the following is not an indicator?

Litmus solution
China rose paste
Turmeric paste
Distilled water

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16. Think before you answer

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