(a). While making baking powder tartaric acid id being added to it because when this mixture is heated or mixed with water carbon dioxide gas is evolved which causes the bread or cake to rise making them spongy and soft.
(b). Bleaching powder is used for disinfecting drinking water because bleaching powder is an oxidizing agent and helps in removing or killing the germs.
(c). Strong acid means those acids which gives a very high H+ ion concentration upon dilution or those which are able to generate a greater volume of H+ ions per unit quantity whereas concentrated acid means how many moles of the acid is present in a given quantity of a solvent. Higher concentration means greater amount of the acid per unit of the solvent.
