Question

9. The gas used in our kitchen is liquefied petroleum gas (LPG). It exists in the form of liquid inside the
cylinder. When it comes out of the cylinder, it becomes a gas (change-A) and then it burns (change-B).
What processes take place during this?
10. Give reasons for the following​

Answer 1

Answer :-

process takes place -

Change A is physical change - In this change, the liquefied gas changes it states from liquid to gas and hence no new substance are formed.

Change B is chemical change:- Burning produces new substance and hence the reaction can't be reversed back.

Gas burning_+ CO 2+heat+othersubstance

reason :-

The gas we use in the 'kitchen' is called 'Liquefied petroleum gas' (LPG). In the 'cylinder', it exists as a 'liquid'.19-May-2015