A power plant flue gas contains 0.064 % SO2 by mass. It is treated with hydrogen peroxide: SO2 + H2O2 -> H2SO4. Using S = 32, O = 16, H = 1, the mass of H2O2 (molar mass 34) required to convert all the SO2 in 1000 kg of flue gas is

JEE Advanced levelSingle correct optionDifficulty 3 of 3ev042

A power plant flue gas contains 0.064 % $SO X_{2}$ by mass. It is treated with hydrogen peroxide: $SO X_{2} + H X_{2} O X_{2} H X_{2} SO X_{4}$ . Using $S = 32$ , $O = 16$ , $H = 1$ , the mass of $H X_{2} O X_{2}$ (molar mass 34) required to convert all the $SO X_{2}$ in 1000 kg of flue gas is

SO X_{2}

in 1000 kg =

1000 \times 0.064/100 = 0.64 kg = 640 g

, which is

640/64 = 10.0

mol. The equation is balanced 1:1, so 10.0 mol

H X_{2} O X_{2}

is needed:

10.0 \times 34 = 340 g

. (640 g is the mass of

SO X_{2}

itself.)