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Give scientific reason first 2 answer will mark as brilliant​

Answer»

ong>Answer:

  1. Carbon dioxide reacts with calcium hydroxide solution to produce a white precipitate of calcium carbonate. Limewater is a solution of calcium hydroxide. If carbon dioxide is bubbled through limewater, the limewater turns MILKY or cloudy white.
  2. Biogas is an eco-friendly fuel because it helps to reduce the greenhouse gas emissions and our dependency on fossil fuels. It is PRODUCED from decomposition of organic matter, thus is an effective way of disposal of organic waste.

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