1) Which of these is a renewable source of fuel? a) Petrol b) b) Diesel c) c) Biogas d) d) Coal 2) Which fuel is formed from dead plants and animals buried millions of years ago? a) Petrol b) b) Biogas c) c) Solar energy d) d) Hydrogen 3) Which of these is the cleanest fuel? a) Wood b) b) LPG  c) c) Coal d) d) Kerosene 4) Which fuel is used in cars and buses? a) Biogas b) b) Petrol c) c) Firewood d) d) Electricity 5) CNG stands for: a) Common Natural Gas b) b) Compressed Natural Gas c) c) Cold Natural Gas d) d) Converted Natural Gas 6) Which fuel is stored in cylinders at homes? a) Coal b) b) Petrol c) c) LPG d) d) Biogas 7) Which fuel is used to generate electricity in thermal power plants? a) Coal  b) b) CNG c) c) Biogas d) d) Petrol 8) Which of the following is NOT a fossil fuel? a) a) Coal b) b) Biogas c) c) Petrol d) d) Diesel 9) Burning of which fuel causes the least pollution? a) Diesel b) b) CNG c) c) Coal d) d) Wood 10) Which of these is an inexhaustible source of energy? a) Solar energy b) b) Coal c) c) Petrol d) d) LPG

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