DDT on exposure to water decomposes. Half-life = 10 years. How much time will it
take for its 90% de

Question

DDT on exposure to water decomposes. Half-life = 10 years. How much time will it
take for its 90% decomposition?

Professor PC Thomas Classes · Answer

$t = \frac{2.303}{k} \log(\frac{100}{10})$. $k = 0.693/10$.