Which of the following is not correct?
- AAmmonia is used as a refrigerant.
- B$A$ mixture of $Ca(CN)_2$ and $C$ is known as nitrolim.
- C$A$ mixture of $Ca(H_2PO_4)_2$ and $CaSO_4 \cdot 2H_2O$ is known as superphosphate of lime.
- DHydrolysis of $NCl_3$ gives $NH_3$ and $HOCl$.
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