166 FIRST YEAR COURSE IN GENERAL SCIENCE 



eggs. In all cases a physician should be called at once and 

 the more powerful antidotes should be given only under his 

 direction. 



Many antiseptics and disinfectants which are used to kill 

 disease germs, will kill people also if taken internally. Cor- 

 rosive sublimate, carbolic acid, formaldehyde, and other poi- 

 sonous compounds are commonly used as disinfectants. 

 They should be plainly marked POISON and kept where they 

 cannot be used accidentally. 



EXERCISES 



1. (a) State five physical properties of water. (6) Which of these 

 do you think would be very important in chemical work? Why? 



2. Name four uses of water besides those of the home and the farm. 



3. Name four uses of carbon dioxide. State one which depends 

 upon a chemical property. 



4. Is there carbon dioxide in baked bread? Why? 



5. Is there carbon dioxide in cider? Why? 



6. What relation is the're between acids, bases, and salts? 



7. What is meant by the expression, "One substance neutralizes 

 the effect of another"? 



8. What substance might neutralize the chemical effect of ammonia 

 solution? 



9. What substance might remove a spot made upon blue cloth by 

 lemon juice? 



10. Why is sulphuric acid the most important of all acids? 



