The gas we use in the kitchen is called liquified petroleum gas (LPG). In the cylinder, it exists as a liquid. When it comes out from the cylinder it becomes a gas (Change - A) then it burns (Change - B). The following statements pertain to these changes. Choose the correct one.<b>(i)</b> Process - A is a chemical change.<b>(ii) </b>Process - B is a chemical change.<b>(iii) </b>Both processes A and B are chemical changes.<b>(iv) </b>None of these processes is a chemical change.<b>2.</b> Anaerobic bacteria digest animal waste and produce biogas (Change - A). The biogas is then burnt as fuel (Change - B). The following statements pertain to these changes. Choose the correct one.<b>(i) </b>Process - A is a chemical change.<b>(ii)</b> Process