In a multiple effect evaporator, the effect of boiling point elevation is to

Solution (By Examveda Team)

In a multiple effect evaporator, boiling point elevation refers to the increase in the boiling point of a solution due to the presence of dissolved solids (such as salts). This phenomenon occurs because the solutes lower the vapor pressure of the solution, requiring a higher temperature for boiling to occur.

As a result:

Reduce the economy: The boiling point elevation increases the energy required to evaporate the solvent in each effect of the evaporator system. This increase in energy consumption reduces the overall efficiency or economy of the evaporator system.

Reduce the capacity: Boiling point elevation does not directly reduce the capacity of the evaporator, as it refers to the efficiency rather than the maximum processing capacity.

Increase the economy: This is incorrect because boiling point elevation actually decreases the efficiency or economy of the evaporator system.

None of these: This option is incorrect because boiling point elevation does have a specific effect on the evaporator system.

Therefore, the correct answer is Option B: Reduce the economy.