FUELS AND CARBON COMPOUNDS 271 



9. What kind of a stove does alcohol require? 



10. Can alcohol be vaporized and burned like gasoline vapor? 



11. What " cautions " should be observed in Using a gasoline 

 stove? 



12. Is electricity an efficient source of heat ? Why? 



13. What is the price of artificial gas' in your city? Of elec- 

 tricity? 



14. What are the advantages of gas over coal as a fuel for the 

 cook stove? 



15. Name three uses of carbon dioxide. 



16. When acid (hydrochloric acid) is poured on calcium car- 

 bonate, what products are formed ? 



17. What is the purpose of raising dough? 



18. When an explosion of " fire damp " occurs in a mine, "choke 

 damp " is formed. Explain how. 



19. What causes cider to " work "? 



