Q1: Pick out the wrong statement.

ANS:C - For Laminar flow over a plate of length L, the local mass transfer co-efficient at a distance L from the leading edge is 1.5 x 10^-2m/s. Then the average mass transfer co-efficient for the plate is 2 x 10^-2m/s.

The wrong statement is: "For Laminar flow over a plate of length L, the local mass transfer coefficient at a distance L from the leading edge is 1.5 x 10^-2 m/s. Then the average mass transfer coefficient for the plate is 2 x 10^-2 m/s." This statement is incorrect. The average mass transfer coefficient for laminar flow over a plate cannot simply be obtained by averaging the local mass transfer coefficient at a single distance from the leading edge. Instead, it requires integrating the local mass transfer coefficient over the entire length of the plate and considering the velocity profile of the fluid. Therefore, the correct statement should involve a method for calculating the average mass transfer coefficient, such as using the appropriate integral relationship based on the fluid dynamics and mass transfer principles governing the flow over the plate.