Question

In which of the following process, chemical change occur? 1-evaporation 2-burning 3-moisturisations 4-boiling Pls tell me the answer

Answer 1

Hi mate!!
Your question has been answered here


★ Chemical change :-
When a substance combines to form a new substance it is known as chemical change.

★ Physical change :- when no new substance is formed, it is known as physical change.


* Evaporation is a physical change.

* Burning is a chemical change.

* Moisturization is a chemical change.

* Boiling is a physical change.


Hope it helps you.

Answer 2

hiii!!!

here's ur answer...

first of all, what are chemical and physical changes??

PHYSICAL CHANGE - it's a reversible change in which there's no change in it's chemical properties. only change in it's physical properties like shape, size etc.

CHEMICAL CHANGE - it's a irreversible change and there's change in the chemical properties of the the substances. the substance react and form a new substance.

given :-

1. evaporation

2. burning

3. moisturisation

4. boiling

we have to identity in which, chemical change occur.

EVAPORATION is the process in which a liquid is converted in it's vapours. and by condensation we can get back that liquid. so it's a physical change.

next is BURNING, during burning, the particles of the object react with oxygen and give off light and heat.. and new molecules are formed. hence it's a chemical Change.

MOSTURIZING is a physical change. as we know it's applied in dry skin to mosturize it but it's not permanent. so it's a physical change.

BOILING is also a physical change. because no new substance is formed. only change in it's physical properties.

hence, the only chemical process is BURNING here...

hope this helps..!!