MCQ
The most common minerals of phosphorus are
- AHydroxy apatite and kernite
- BColemanite and fluoraptite
- CBorax and fluoraptite
- ✓Hydroxy apatite and fluorapatile
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$A+B\xrightarrow{K}C$
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${K_2}Cr_2{O_7}/{H^ + } + y \to \mathop {C{r^{ + 3}} + Others}\limits_{(green)\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} $
