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Q 1. Choose the incorrect statement We are encouraged to plant more trees so as to ensure clean environment and also provide biomass fuel Gobar-gas is produced when crops, vegetable wastes, etc., decompose in the absence of oxygen The main ingredient of biogas is methane and it gives a lot of smoke and also produces a lot of residual ash. Bio-mass is a renewable source of energy Q 2. Which power plant uses coal to generate electricity? Hydro Power plant Nuclear Power Plant Thermal Power Plant Biogas Power Plant Q 3. The use of charcoal is discouraged even though it is a better fuel than coal, because: charcoal is prepared from destructive distillation of wood Charcoal burns with flames coal has a higher heat generation efficiency coal burns comparatively with less smoke Q 4. The material used for making solar cells is Silver Gold Silicon Copper Q 5. What is the major problem in harnessing nuclear energy? Splitting of the nuclei Duration...