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Question

Osmosis is the process of movement of water molecules from its

This question was previously asked in
CDS II 2021 General Knowledge Previous Year Paper (14-Nov-2021)
The correct answer is

higher concentration to its lower concentration through a semi-permeable membrane.

The correct answer is higher concentration to its lower concentration through a semi-permeable membrane.

Osmosis is the net movement of water (solvent) molecules across a selectively permeable membrane from a region of higher water concentration (dilute solution, high water potential) to a region of lower water concentration (concentrated solution).

A cell wall and a fully permeable membrane let solutes pass too, so there is no osmosis across them; water never moves net from lower to higher water concentration by osmosis (that would need reverse osmosis/applied pressure).

Short trick: Water flows "downhill": dilute → concentrated, across a semi-permeable membrane.

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