What do mean by Active transport ?
Movement of substances from a place of loweer to higher concentration by using the energy of the cell.
ICSE
What is semi permeable membrane ?
The membrane that allows the diffusion of water molecules through them but resist the movement of solute molecules.
What is Selectively permeable membrane ?
The membrane which allows the useful substances to pass in and harmful substances to diffuse out of the cell.
Define Osmosis.
Movement of water molecules from the region of their higher concentration to the region of their lower concentration through a semmi permeable membrane.
Define Diffusion.
Movement of molecules of solids, liquids and gases from a place of higher concentration to a place of lower concentration.
What are chemical equilibrium ?
An equilibrium, that is attained through a chemical change is known as a chemical equilibrium.
What are Redox reaction ?
A reaction in which oxidation and reduction take place simultaneously is known as Redox reaction.
What are Reducing agents ?
A reducing agent is one that reduces other substances either by providing electrons, or by providing hydrogen or an electropositive ion, or by removing oxygen or an electronegative ion.
What are Oxidising agent ?
An Oxidising agent is one that oxidizes other substances either by accepting electrons or by providing oxygen or an electronegative ion, or by removing hydrogen or an electropositve ion.
What is Reduction reaction ?
Reduction is a reaction in which a compound is deprived of all, or part, of the oxygen it contains.