P-Block Elements Ques 245
Question: Phosphorus is manufactured by heating in a electric furnace a mixture of NCERT 1977; CPMT 1974, 78, 81, 86]
Options:
A) Bone ash and coke
B) Bone ash and silica
C) Bone ash, silica and coke
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ 2Ca_3{{(PO_4)} _2}+6SiO_2\xrightarrow{1770K} $ $ 6CaSiO_3+P_4O _{10} $
$ P_4O _{10}+10C\xrightarrow{1770K}\underset{\text{White }}{\mathop{P_4}}+10CO $
