Question

. Give examples of following reactions with chemical equations. (8)
(a) Exothermic reaction
(b) Endothermic reaction
(c) Change in physical state
(d) Formation of precipitate

Answer 1

Answer:

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Answer 2

Answer:

(a) CH4+2O2--->CO2+H2O+heat energy

(b) 6CO2+6H2O --->C6H12O6+6O2

(c) Zn(s)+HCl(aq)--->ZnCl2(aq)+H2(g)

(d)CuSO4+2NaOH--->Na2SO4+Cu(OH)2(precipitate)

Explanation:

Note- (s)--> stands for solid

(aq)--> Stands for aqueous that is liquid

(g)--> stands for gas