(a) State the various characteristics of chemical reactions.
(b) State one characteristic each of the chemical reaction which takes place when:
(1) dilute HCL is added to sodium carbonate
(2) lemon juice is added gradually to potassium, permanganate solution
(3) dilute sulphuric acid is added to barium chloride solution
(4) quicklime is treated with water
(5) wax is burned in the form of a candle
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(a) 1. Chemical reactions are mostly irreversible
2. Chemical reactions produce new products which are different from the constituent reactants.
3. Chemical reactions are of different types such as combination, redox etc.
(B) 1. HCl + Na2CO3 -> NaCl + H20 + CO2
brisk effervescence
2.
3. H2SO4 + BaCl2 -> BaSO4 + HCl
BaSO4 is white precipitate
4.CaO + H2O -> Ca(OH)2
5. change in physical state
2. Chemical reactions produce new products which are different from the constituent reactants.
3. Chemical reactions are of different types such as combination, redox etc.
(B) 1. HCl + Na2CO3 -> NaCl + H20 + CO2
brisk effervescence
2.
3. H2SO4 + BaCl2 -> BaSO4 + HCl
BaSO4 is white precipitate
4.CaO + H2O -> Ca(OH)2
5. change in physical state
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