COMPOUNDS 209 



QUESTIONS 



1. Of what is water composed? What is its symbol? 



2. What are mineral waters ? Why is ocean water salt ? 



3. Of what use is water in chemistry? Why is water a 

 valuable solvent? State what you can of the importance of 

 water in living bodies. 



4. What is the symbol for sulphuric acid? How and why 

 is sulphuric acid used in obtaining other acids? What is a 

 sulphate ? 



5. How is carbon dioxide formed? Describe the compound. 

 Name any common occurrence of carbon dioxide. Is CO 2 useful 

 to plants ? Is it useful to animals ? 



6. What is the objection to oil stoves and gas heaters in a 

 room? Does CO 2 support combustion? 



7. Under what conditions is carbon monoxide formed ? Why 

 is it more dangerous than CO 2 ? State the danger from coal 

 stoves. 



8. Of what is ammonia composed? What is the substance 

 that is commonly called " household ammonia " ? Name two salts 

 of NH 4 OH. 



9. What is cellulose? State its symbol. Name parts of 

 plants that are composed largely of cellulose. 



10. Of what is starch composed ? How is it made? Where is 

 it found ? Of what use is starch in seeds ? Of what use in other 

 parts of plants ? What is the use of starch to man ? 



11. From what is cane sugar obtained and by what means? 

 What is its symbol? W r hat is molasses? 



12. Where does dextrose occur? What other names are given 

 to it ? From what other compounds can it be made ? 



13. State uses of common alcohol. How is it formed? 



14. What are fats and oils ? Where is each found ? What is 

 a fatty acid ? 



15. What is a soap? Explain how soap is formed. Show the 

 action of soap in cleansing things. Why does not water alone 

 serve as well ? 



