Activation energies for different reactions are given below.
a) $\mathrm{A}\to$ products, $\mathrm{Ea}=14 \mathrm{K}·\mathrm{Cal}$
b) $\mathrm{B}\to$products, $\mathrm{Ea}=16 \mathrm{K}$.Cal
c) $\mathrm{C}\to$ products, $\mathrm{Ea}=12 \mathrm{K}$.Cal
d) $\mathrm{D}\to$products, $\mathrm{Ea}=10 \mathrm{K}$.Cal
If the temperature increases by $10°\mathrm{C}$ for which reactions the temperature coefficients are maximum and minimum respectively.

The given reactions are values of activation energy are:

          a) $\mathrm{A}\to$ products, $\mathrm{Ea}=14 \mathrm{K}·\mathrm{Cal}$
          b) $\mathrm{B}\to$products, $\mathrm{Ea}=16 \mathrm{K}$.Cal
          c) $\mathrm{C}\to$ products, $\mathrm{Ea}=12 \mathrm{K}$.Cal
          d) $\mathrm{D}\to$products, $\mathrm{Ea}=10 \mathrm{K}$.Cal

• As the temperature of the reaction increases, the rate of the reaction also increases and the activation energy increases. 
• In the given reactions, the activation energy of reaction b) is the highest due to which it will give the maximum temperature coefficient and the activation energy of reaction c) is the lowest due to which it will give the minimum temperature coefficient.