Question

main characteristics of chemical reaction give at least one example in each case.

Answer 1

ANSWER

MAIN CHARACTERISTICS OF CHEMICAL REACTION

1. Evolution of gas- reaction between zinc granules and dilute sulphuric acid to form hydrogen gas.

2. Formation of precipitate- reaction between potassium iodide and lead nitrate to form yellow precipitate of lead iodide.

3. Change in colour- when citric acid react with potassium permanganate then purple colour of potassium permanganate disappears.

4. Change in temperature- reaction between zinc granules and dilute sulphuric acid.

5. Change in state- when wax is burnt then, water which is liquid and carbon dioxide which is gas are formed.

HOPE IT HELPS

THANKS

Answer 2

heya mate... here's ur answer..

characterstics:

*evolution of gas

(reaction between zinc and dilute sulphuric acid)

* formation of precipitation

(reaction between potassium iodide and lead nitrate)

*change in colour

(reaction between citric acid and purple coloured potassium permanganate)

*change in temperature

(reaction between zinc and dilute sulphuric acid)

*change in state

(combustion reaction of candle wax)

hope this helps you...

thanks :-)