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Question

Which of the following does not contain nitrogen?


A
Proteins in plants and animals
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B
Members of apatite family
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C
Indian saltpetre
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D
Chile saltpetre
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Solution

The correct option is C Members of apatite family
Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, with high concentrations of $$OH^{-},F{-},Cl{-}$$ respectively, in the crystal. Proteins in plants and animals have nitrogen. Chile saltpetre and Indian saltpetre are $$NaNO_3$$ and $$KNO_3$$ respectively.

Chemistry

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