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Identify the correct statements regarding Mass flow hypothesis. (A) Mass flow is faster than diffusion. (B) Mass flow is the result of pressure difference between the end points. (C) Different substances involved in mass flow move at different paces. (D) Mass flow can result through either a positive or a negative hydrostatic pressure gradient. Choose the correct answer from the options given below:
Detailed Solution
Mass flow (bulk flow) is faster than diffusion (A is correct) and results from a pressure gradient (positive or negative) between the source and sink ends (B and D are correct). However, in mass flow, all substances move together at the same rate/pace (they are simply carried along in the bulk flow), not at different paces — so C is incorrect. Correct: A, B, D only.