engineering recuitment NFC Chemical Plant Operator Mock Test General Science Chemistry

What is the Chemical formula of Plaster of Paris?

1

(CaSO₄).2H₂O/(CaSO₄₎.^1/2H₂O

2

(CaSO3).4H2O/(CaSO4).1/2H2O

3

(CaSO4).6H2O/(CaSO4).1/3H2O

4

(CaSO2).7H2O/(CaSO4).1/4H2O

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