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  4. When orthophosphoric acid is heated to 600°C, the product formed is

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Q. When orthophosphoric acid is heated to $600^{\circ}C$, the product formed is

AIPMTAIPMT 1989The p-Block Elements - Part2

Solution:

When orthophosphoric acid $(H_3PO_4)$ is heated and dehydration takes place. It form metaphosphoric acid (HPO_3).
$H_3PO_4 \, \xrightarrow \Delta HPO_3 + H_2O$