Which one of the given is commonly known as blue vitriol and is used as a fungicide?

Which one of the given is commonly known as blue vitriol and is used as a fungicide?

Q. Which one of the given is commonly known as blue vitriol and is used as a fungicide?

  1. Potassium nitrate
  2. Copper sulphate
  3. Sodium carbonate
  4. Sodium chloride

Answer: Copper sulphate

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