NOTES BY ADITYA SIR Something which is ‘living’ (not dead) is said to be ‘alive’. ‘alive’ means ‘having Life’. Those things which are alive are called ‘living thing. • What criteria do we use to decid...

CHEMICAL REACTION : process in which new substance are formed with new chemical or properties is called as chemical reaction or chemical change. Example: rusting of iron, digestion, respiration, makin...