Multiple choice questions XXXXVIII — task. Science CBSE, Class 9.

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1. A cell will swell up if :

The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.
The concentration of water molecules is same in the cell and in the surrounding medium.
The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium.
Concentration of water molecules does not matter.

2. Following are a few definitions of osmosis :
Read carefully and select the correct definition.

Movement of solvent molecules from its higher concentration to lower concentration.
Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.
Movement of solute molecules from lower concentration to higher concentration of solution through a semi-permeable membrane.
Movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane.

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