PDF chapter test TRY NOW
1. Nancy kept some wet blue litmus papers in the sun to dry. The rain began to fall suddenly. She was surprised to find that blue litmus papers was turned to red colour. What might have happened there?
2. According to Nancy, rainwater is neither acidic nor basic. However, she noticed that it alters the colour of litmus paper. It has been determined that there is no acid rain. What changed the property of rainwater?
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