Chemistry
Answer
(a) A chemical reaction in which two compounds in their aqueous state react to form an insoluble solid (a precipitate) as one of the products is known as a precipitation reaction.
(b) A chemical reaction in which a base or an alkali reacts with an acid to produce a salt and water only is known as a neutralization reaction.
(c) A catalyst is a substance that either increases or decreases the rate of a chemical reaction without itself undergoing any chemical change during the reaction.
(d) All metallic oxides and metallic hydroxides are called bases, whereas those bases that dissolve in water are known as alkalis.
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