A) Digestion of food
B) Conversion of liquified petroleum gas into gas on opening the cylinder.
C) Photosynthesis
D) Production of biogas from animal waste
Correct Answer: B
Solution :
The liquified petroleum gas is in liquid state because of high pressure. On opening the cylinder valve, the pressure releases and gas comes out. However if released gas is collected and pressurized, we will get back LPG.
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