H3PO4 on heating at 220 C gives XX on heating at 320 C gives YH3PO4 on heating at 320 C - Chemistry - The p-Block Elements

Question

H3PO4 on heating at 220 C gives XX on heating at 320 C gives
YH3PO4 on heating at 320 C gives Y identify X and Y

na · Accepted Answer

X is pyrophosphoric acid i e
H4P2O7
Y is metaphosphoric acid i e (HPO3)n

H3PO4 on heating at 220 C gives XX on heating at 320 C gives YH3PO4 on heating at 320 C gives Y.identify X and Y.