The rate constants for decomposition of acetaldehyde have been measured over the temperature range $700-1000 \mathrm{K}$. The data has been analysed by plotting $\mathrm{lnk}$ vs $\frac{{10}^3}{ \mathrm{T}}$ graph. The value of activation energy for the reaction is ${\mathrm{kJmol}}^{-1}$. (Nearest integer) (Given : $\mathrm{R}=8.31 \mathrm{J}{\mathrm{K}}^{-1}{ \mathrm{mol}}^{-1}$)

Hence, the correct answer is 154.