Which of the following can reduce decomposition of H _ 2 O _ 2 on...

${H}_{2}{O}_{2}$ decomposes on exposure to sunlight or on heating. It also decomposes on standing but at a slow rate. These reactions occur explosively when ${H}_{2}{O}_{2}$ is in contact with dust. Urea acts as a negative catalyst to this reaction and slow down the decomposition of hydrogen peroxide.