An aqueous solution turns the red litmus solution blue. Excess addition of which of the following solutions would reverse the change?
An aqueous solution turns the red litmus solution blue. Excess addition of which of the following solutions would reverse the change?

Q. An aqueous solution turns the red litmus solution blue. Excess addition of which of the following solutions would reverse the change?

  1. Baking powder
  2. Lime
  3. Ammonium hydroxide solution
  4. Hydrochloric acid

Answer: Option (D)
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