In a packaging of dry grapes, the packaging material is made of polyethylene. The dry grapes have certain moisture content. Which of the following is true with respect to the diffusion of certain amount of moisture through the packing?

The diffusion in this case is called permeability

Explore topic-wise MCQs in Food Engineering.

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Explore topic-wise MCQs in Food Engineering.

In a packaging of dry grapes, the packaging material is made of polyethylene. The dry grapes have certain moisture content. Which of the following is true with respect to the diffusion of certain amount of moisture through the packing?

Statement 1: Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step.Statement 2: Diffusion of gas component through the gas-liquid inter-phase is the rate determining step.

Ratio of equilibrium concentrations of solute A in liquid phase and gas phase i.e. CAL* and CAg* respectively is . is called _____

Statement 1: Resistance is inversely proportional to the inter-facial area.Statement 2: The inter-facial area of a body is the area of the dispersed phase in a unit volume of the vessel.

Statement 1: Diffusion is faster than convective mass transfer.Statement 2: Mass transfer is proportional to the area of contact.

Statement 1: A phase boundary exists between alcohol and oxygen.Statement 2: Phase boundary varies with agitation. It is inversely proportional to the amount of agitation provided.

Statement 1: When alcohol is allowed to move from chamber A to chamber B when a barrier between them is removed, it is called multi phase diffusion.Statement 2: When oxygen is made to diffuse into the water, it s called continuous molecular diffusion.

Statement 1: Diffusion of gas component through the resistive film to the bulk of the liquid is the rate determining step.
Statement 2: Diffusion of gas component through the gas-liquid inter-phase is the rate determining step.

Ratio of equilibrium concentrations of solute A in liquid phase and gas phase i.e. CA_L* and CA_g* respectively is . is called _____

Statement 1: Resistance is inversely proportional to the inter-facial area.
Statement 2: The inter-facial area of a body is the area of the dispersed phase in a unit volume of the vessel.

Statement 1: Diffusion is faster than convective mass transfer.
Statement 2: Mass transfer is proportional to the area of contact.

Statement 1: A phase boundary exists between alcohol and oxygen.
Statement 2: Phase boundary varies with agitation. It is inversely proportional to the amount of agitation provided.

Statement 1: When alcohol is allowed to move from chamber A to chamber B when a barrier between them is removed, it is called multi phase diffusion.
Statement 2: When oxygen is made to diffuse into the water, it s called continuous molecular diffusion.