Substance(s) which reduces/reduce the rate of setting of Plaster of Paris is (are)
Substance(s) which reduces/reduce the rate of setting of Plaster of Paris is (are)
A. NaCl
B. Alum
C. Borax
D. `CaSO_4`
5 views
1 Answers
Correct Answer - B,C
Alum and borax reduce the rate of setting of Plaster of Paris. Sodium chloride accelerates the rate of setting while `CaSO_4` has no effect on the rate of setting.
5 views
Answered