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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( $\rho_{ Ni }$ (density of Nickel) is $10 \,gmL ^{-1}$, Molar mass of Nickel is $60\,gmol ^{-1} F =96500\,C\,mol ^{-1}$ )
