Choose the most appropriate answer/s. The catalyst in biodiesel (vegetable oil ester) production is [ ] glycerin 1. [ ] ethanol [ ] NAOH [ ] yeast As the geological age of a fuel increases, the H/C and O/C ratios 2. and the heating value [ ] increases, increases [ ] increases, decreases [ ] decreases, decreases [ ] decreases, increases The main product of slow pyrolysis is [ ] bio-oils [ ]chemicals and gas 3. [ ] bio-oils, chemicals and gas [ ]charcoal and gas Three principal thin film technologies in the market are [ ] sc-Si, mc-Si, Ribbon Silicon [] CdTe, mc-Si, Ribbon Silicon 4. [ ]a-Si, CIS, CdTe [ ]sc-Si, mc-Si, CIS The objective(s) of a downdraft gasifier is/are to [ | convert the condensable volatile matter to permanent combustible gases. 5. [ ]convert charcoal to permanent combustible gases. [ ] convert tar to permanent combustible gases. [ ] convert condensable volatile matter, charcoal and tar to permanent combustible gases. 5. Highest amount of biogas is produced by ( in cubic meter of biogas by per kg of the material) [ ] cattle dung [ ] food waste [ ] baggase [ ]oil seed cake The only country in the world that produces entire power from renewable energy sources is [ ] Ireland [ ] Nepal []Germany [ ]Iceland Hemicellulose has a generic formula of [ ](C;H;O4), [ ](CH16O5)n (CH12OH) [ ](CH12O6)n.