MCQ
In the electrothermal process, the compound displaced by silica from calcium phosphate is
- ACalcium
- BPhosphine
- CPhosphorus
- ✓Phosphorus pentoxide
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$t/s$ $0$ $30$ $60$ $90$
$Ester/mol\, L^{-1}$ $0.55$ $0.31$ $0.17$ $0.085$
What will be the average rate of reaction between the time interval $30$ to $60$ seconds?

(At. nos. $Cr = 24, \,Mn = 25,\, Fe = 26, \,Co = 27$)