Question

Which among the given salts is used as a fungicide?

• A. Sylvine
• B. Gypsum
• C. Blue vitriol
• D. Table salt

Answer 1

The correct option is C

Blue vitriol

${\text{CuSO}}_4.5{\text{H}}_2\text{O}$ is a copper salt. It is also called blue vitriol. It is a blue, crystalline compound of copper sulphate.

Blue vitriol is soluble in water and is a very important industrial salt of copper. Some uses of copper sulphate salt are:

• It is used in insecticides.
• It is used in electrolytes for batteries, and in electroplating baths.
• It is used as an ingredient in Bordeaux Mixture which is sprayed as a fungicide to control plant diseases.

Hence, blue vitriol is the salt which is used as a fungicide.