Q. Fill in the blanks :
(a) A reaction in which two or more substances combine to form a single substance is called a ___ reaction.
(b) A ___ is a substance which changes the rate of a chemical reaction without undergoing a chemical change.
(c) The formation of gas bubbles in a liquid during a reaction is called___
(d) The reaction between an acid and a base is called ___
(e) Soluble bases are called ___
(f) The chemical change involving iron and hydrochloric acid illustrates a ___ reaction.
(g) In the type of reaction called ___ two compounds exchange their positive and negative radicals respectively.
(h) A catalyst either ___ or ___ the rate of a chemical change but itself remains ___ at the end of the reaction.
(i) The chemical reaction between hydogen and chlorine is a ___ reaction
(j) When a piece of copper is added to silver nitrate solutuions, it turns ___ in colour.
