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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Related Questions
The reaction:
BaCl2 (aq) + H2SO4 (aq) ⟶ BaSO4 (s) + 2HCl (aq) is
(i) displacement reaction
(ii) neutralisation reaction
(iii) decomposition reaction
(iv) double displacement reaction
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(i) carbon dioxide
(ii) oxygen
(iii) sodium hydroxide
(iv) no other product
Match the following :
When hydrogen burns in oxygen, water is formed; when electricity is passed through water, hydrogen and oxygen are given out. Name the type of chemical changes involved in the two cases.