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Answer:
1) Baking Soda
2) Basic Oxide - Sodium Oxide
Acidic Oxide - Sulphur Dioxide
3) pH paper, Litmus Paper, Universal Indicator and pH scale.
4) Egs. of Natural Indicator-- Turmeric, Tamarind Juice,etc.
Egs. of Synthetic Indicator-- Litmus Paper, pH paper,etc.
7) By dipping the pH Paper in it.
Explanation:
1) Baking Soda has the ability to make the batter fluppy.
2) Sodium Oxide reacts with water to give Sodium Hydroxide and SO2 reacts with Water to give Sulphurous Acid.
3) pH paper, Litmus Paper, etc. can be used to determine the Acid and Base.
4) Natural Indicator can be used instead of Synthetic Indicator.
7) By dipping the pH paper or Litmus Paper we can indicate the water because when the pH paper are dipped in Water it turns green because the Water is Neutral in Nature meanwhile the Litmus Paper doesn't change it's colour.