State the various characteristics of chemical reactions.
(b) State one characteristics each of the chemical reaction which takes place when:
(i) Dilute hydrochloric acid is added to sodium carbonate
(ii) Lemon juice is added gradually to potassium permanganate solution
(iii) Dilute sulphuric acid is added to barium chloride solution
(iv) Quicklime is treated with water
Wax is burned in the form of a candle

Question

State the various characteristics of chemical reactions.
(b)	State one characteristics each of the chemical reaction which takes place when:
(i)	Dilute hydrochloric acid is added to sodium carbonate
(ii)	Lemon juice is added gradually to potassium permanganate solution
(iii)	Dilute sulphuric acid is added to barium chloride solution
(iv)	Quicklime is treated with water
Wax is burned in the form of a candle

MyClass24 · Accepted Answer

A chemical reaction is a reaction that takes place to form new substance by reacting with It is characterised by Evolution of a gas, Change in colour, Formation of a precipitate, Change in temperature, Change in state.
(i) Evolution of Carbon dioxide gas
Change in colour from purple to colourless
Formation of a white precipitate of Barium sulphate
Change in temperature, an exothermic reaction
Change in state from solid to liquid and gas