\[ \begin{array}{l} \mathrm{P}_{4}+5 \mathrm{O}_{2} \rightarrow \ma...
0\[
\begin{array}{l}
\mathrm{P}_{4}+5 \mathrm{O}_{2} \rightarrow \mathrm{P}_{4} \mathrm{O}_{10}(\mathrm{x} \% \text { yields }) \\
\mathrm{P}_{4} \mathrm{O}_{10}+6 \mathrm{H}_{2} \mathrm{O} \rightarrow 4 \mathrm{H}_{3} \mathrm{PO}_{4}(\mathrm{y} \% \text { yields }) \\
\mathrm{H}_{3} \mathrm{PO}_{4}+3 \mathrm{NaOH} \rightarrow \mathrm{Na}_{3} \mathrm{PO}_{4}+3 \mathrm{H}_{2} \mathrm{O} \text { (z\% yields) }
\end{array}
\]
P
W
0.8 mole of \( \mathrm{P}_{4} \) react with oxygen and form 0.4 mole of \( \mathrm{P}_{4} \mathrm{O}_{10}, \mathrm{P}_{4} \mathrm{O}_{10} \) further hydrolysis and form 0.8 mole of \( \mathrm{H}_{3} \mathrm{PO}_{4} \). If all \( \mathrm{H}_{3} \mathrm{PO}_{4} \) neutralise by \( \mathrm{NaOH} \) and form 0.6 mole \( \mathrm{Na}_{3} \mathrm{PO}_{4} \).
Calculate value of \( \frac{x}{100}+\frac{y}{100}+\frac{\mathrm{Z}}{100} \)
(A) 1
(B) 1.75
(C) 2
(D) 1.8
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