Q1: The unit of specific cake resistance is

ANS:A - gm/cm²

The unit of specific cake resistance is gm/cm² (grams per square centimeter). Here’s why:

1. Specific Cake Resistance:
   • Specific cake resistance (also known as specific filtration resistance) is a measure of the resistance offered by the filter cake formed during filtration.
   • It quantifies the difficulty of fluid flow through the filter cake and is influenced by factors such as cake thickness, porosity, and the characteristics of the solids being filtered.
2. Units:
   • Specific cake resistance is typically expressed in units of mass per unit area.
   • In the SI (International System of Units) system, the unit of mass is grams (g), and the unit of area is square centimeters (cm²).
   • Therefore, specific cake resistance is commonly measured in grams per square centimeter (gm/cm²).
3. Other Options:
   • cm/gm: This unit would represent the reciprocal of specific cake resistance, which is not typically used as a standard unit.
   • cm/gm²: This unit is not commonly used for specific cake resistance measurement, as it does not correctly represent the mass per unit area.
   • gm/gm: This unit does not correspond to specific cake resistance and is not applicable in this context.