The final fuel type which result in from coal fication is

A$.H_2$

B$.C{O}_2$

C$.$ none of the mentioned answers is correct

D$.C{H}_4$

Examples of possible power generators which lize $H_2$ as fuel include

A$.$ piston engines

B$.$ gas power plants

C$.$ all mentioned answers are correct

D$.$ fuel cells

Which one of the following pollutants is emi by SMES systems

A$.$ liquid helium

B$.$ liquid nitrogen

C$.$ all of the mentioned answers are correct

D$.$ ammonia

E$.$ none of the mentioned answers is correct

Disruption to marine life occurs when we

A$.$ remove the cables under sea for onshore wind bines

B$.$ none of the mentioned answers is correct

C$.$ remove the cables under ground for offshore turbines

D$.$ remove the cables under sea for offshore winc bines

E$.$ remove the cables under ground for onshore turbines

When manufacturing Silicone $($Si$),$ the reas use Silane $(Si{H}_4)$ and Tricholorsilane $(SiHC{L}_3)$

A$.$ all mentioned answers are correct

B$.$ purify the Silicone to $99\mathrm{.}999\%$ purity level

C$.$ remove moisture

D$.$ increase charge carriers