define elecrolyte n osmotic pressure.

An electrolyte is a substance that contains free ions which makes it electrically conductive. In simple words, when an electric current is passed through an electrolyte, it conducts electricity. The carrier of charge are free ions which can have a net positive or negative charge

Osmotic pressure is the pressure required to prevent solvent from passing through a semipermeable membrane from a region of higher concentration of solute to a region of lower concentration of solute

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An electrolyte is a liquid substance which acts as a medium to conduct electricity. On passing electricity through a electrolyte, the ions move towards their respective electrode

Osmotic pressure is the pressure required to prevent solvent from passing through a semipermeable membrane from a region of higher concentration of solute to a region of lower concentration of solute. During the day time, due to the photosynthetic activity the guard cells swell because of increase in high osmotic pressure that is the pressure required to hold water increases and as a result the outer wall of the cells that lie towards the stomatal opening bulges outwards and thus the opening widens. During night time, when the osmotic pressure of the guard cells become low that is the pressure required to hold water decreases, water leaves these cells and this makes the cells flaccid and the aperture closes

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