MCQ
Superphosphate of lime contains
- A$C{a_3}{(P{O_4})_2}$
- B$CaHP{O_4}$
- C$C{a_3}{(P{O_4})_2} + {H_3}P{O_4}$
- ✓$Ca{({H_2}P{O_4})_2}$
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$A$. has been used in spaceship
$B$. has as efficiency of $40 \%$ to produce electricity
$C$. uses aluminium as catalysts
$D$. is eco-friendly
$E$. is actually a type of Galvanic cell only