Decomposition of H₂O₂ follows a first order reaction. In fifty minutes the concentration of H₂O₂ decreases
from 0.5 to 0.125 M in one such decomposition. When the concentration of H₂O₂ reaches 0.05 M, the rate of formation of O₂ will be :
JEE Main 2016 · Session, Shift 1 · Q469