Description : Which of the following substance is highly plastic? (1) Quartz (2) Mica (3) Granite (4) Clay
Last Answer : (4) Clay Explanation: Clays exhibit plasticity when mixed with water in certain proportions. When dry, clay becomes firm and when fired in a kiln, permanent physical and chemical changes ... with different minerals and firing conditions, are used to produce earthenware, stoneware, and porcelain.