Fructose in presence of HIO4 gives ----> xHCOOH + yHCHO + CO₂ 
Ratio of x and y is ?

Dear Student,

x= 3 and y = 1, the balance reaction scheme for the given condition is expressed below,

$C_6{H}_{12}{O}_6\stackrel{5HI{O}_4}{\to }3HCOOH + HCHO + C{O}_2$
Hence under the presence of HIO₄ three equivalent formic acid and one equivalent of formaldehyde is produced from the reaction scheme.

Regards.