A) \[Ca{{(HP{{O}_{4}})}_{2}}.{{H}_{2}}O+2CaS{{O}_{4}}.2{{H}_{2}}O\]
B) \[C{{a}_{3}}{{(P{{O}_{4}})}_{2}}+2CaS{{O}_{4}}\]
C) \[CaS{{O}_{4}}+CaO\]
D) \[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}.{{H}_{2}}O+CaS{{O}_{4}}\]
Correct Answer: A
Solution :
Mixture of calcium dihydrogen phosphate and gypsum is known as super phosphate of lime. The formula is: \[Ca{{({{H}_{2}}P{{O}_{4}})}_{2}}.{{H}_{2}}O+2(CaS{{O}_{4}}.2{{H}_{2}}O)\]
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