Adding iron filing to aerated water
Adding sodium metal to water
Cooling a solution of Iron (II) sulphate to obtain the hydrated salt
Cooling water to obtain ice
Burning the domestic gas (Utilgas) for cooking
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Discussions (26)
ALL i knw z dat no new substance z formed(i.e liquid 2 solid
A physical change is that in which is reversible and no new substances are formed
All change of state processes such as melting, freezing, sublimation, condensation and so on undergo physical changes.
the process is reversible and so no new substance is formed..,its therefore a physical change.
since its a physical change, its meant to be reversible.i.e cooling of water to form ice can be reversed to form water back but burning of domestic gas for cooking cannot be reversed cuz the gas is completely burnt in oxygen and a new product is formed
very interesting! Wen water(liquid) put in a fridge to make block (ice) dats d process of FREEZING as a (physical) change of form & state of matter. Wic d change is easily reversible (back to melting). Therefore, answer is "D"
Physical change z reversible nd no new substance z 4med;water undergoes fusion 2 4m ice on coolin,ice undergoes melting n turns 2 water on heatin,as u can c d change z rversible n no new substance 4med
