Chemistry
Complete the following statements.
(a) The chemical change involving iron and hydrochloric acid illustrates a …………… reaction.
(b) In the type of reaction called …………… two compounds exchange their positive and negative radicals.
(c) A catalyst either …………… or …………… the rate of a chemical change but itself remains …………… at the end of the reaction.
(d) On heating, hydrated copper sulphate changes its colour from …………… to ……………
Chemical Reaction
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Answer
(a) The chemical change involving iron and hydrochloric acid illustrates a displacement reaction.
(b) In the type of reaction called double displacement two compounds exchange their positive and negative radicals.
(c) A catalyst either accelerates or decelerates the rate of a chemical change but itself remains unaffected at the end of the reaction.
(d) On heating, hydrated copper sulphate changes its colour from blue to white.
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