Which one of the following statements is not correct? (A) Ammonal is an explosive containing amm...

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Which one of the following statements is not correct?
(A) Ammonal is an explosive containing ammonium nitrate.
(B) Sodium azide is used as detonator.
(C) \( \mathrm{CaCN}_{2} \) is used as an insecticide.
(D) Urea, CAN, Ammonium sulphate are used as nitrogen fertilizers.
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