UPPSC 2019 General Studies I Solved Paper

(c) Gypsum (CaSO ${}_4^{}.2{\mathit{H}}_2\mathit{O}$ ) contains calcium in the form of calcium sulphate. It is an air-hardening material commonly used as a building material. It is found in layered sedimentary deposits along with halite, anhydrite, sulfur, calcite and dolomite.