Some Basic Concepts of Chemistry - Result Question 31 — JEE PYQ Chapterwise

Answer:

Correct Answer: 31. (1008 g)

Solution:

31. The balanced reaction is

$\begin{aligned} & \qquad 6 \mathrm{CaO}+\mathrm{P}4 \mathrm{O}{10} \longrightarrow 2 \mathrm{Ca}_3\left(\mathrm{PO}_4\right)_2 \\ & \text { Moles of } \mathrm{P}4 \mathrm{O}{10}=\frac{852}{284}=3 \\ & \text { Moles of } \mathrm{CaO} \text { required }=3 \times 6=18 \\ & \text { Mass of } \mathrm{CaO} \text { required }=18 \times 56=1008 \mathrm{~g} \end{aligned}$