Question

Salt which is used to obtain immediate cooling and solidification of ice blocks for preserving fish is .

• A. magnesium chloride
• B. ammonium chloride
• C. sodium sulphate

Answer 1

The correct option is B ammonium chloride

In industries, large freezers are used to preserve fishes in ice blocks until they are out for sale. Ammonium chloride is used to keep the blocks of ice intact for a long period. This salt is added to obtain low temperature immediately and for fast solidification of ice. But ammonium chloride is harmful to the intestine hence, fishes should be washed thoroughly before consumption.