i. Classify the following reactions into different types:
a. AgNO3(aq) + NaCl(aq) →AgCl(s) + NaNO3(aq)
b. CaO(s) + H2O(l) → Ca(OH)2(aq)
c. 2KClO3(s) →2KCl(s) + 3O2(g)

ii. Which of the above reaction(s) is/are precipitation reaction(s)? Why is a reaction called precipitation reaction?

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1 Answers

i. a. Double displacement reaction
b. Combination reaction
c. Thermal decomposition reaction
ii. Reaction (a) is a precipitation reaction because precipitate of silver chloride is formed as the product. When a product of a chemical reaction is obtained in the form of a precipitate (insoluble substance), then that reaction is called as precipitation reaction.

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