SALT 269 



3. Briefly indicate the reasoning which leads to the supposition that 

 hydrochloric acid gas contains hydrogen united with another gas, 

 and state how this second gas may be obtained from the acid. 



4. What is the general effect of hydrochloric acid upon (a) metals, 

 (I) oxides? 



5. How may it be proved that hydrochloric acid gas consists of 

 one half its volume of (a) hydrogen and (b) chlorine ? 



6. Describe the properties of chlorine, and state how you would 

 obtain the gas from salt and then reconvert it into salt. 



7. What are chlorates ? How do they differ from chlorides ? 



8. Under what conditions does chlorine unite with (a) hydrogen, 

 (b) phosphorus, (c) sodium ? 



9. A lighted taper is placed in a jar of chlorine, what happens, 

 and why ? 



10. How may chlorine be (a) obtained from, (b) converted into 

 hydrochloric acid ? 



11. What is the action of sulphuric acid upon salt? What are 

 the properties of both products ? 



12. From hydrochloric acid how could you obtain (a) hydrogen, 

 (b) common salt, (c) potassium chlorate ? 



13. What is bleaching powder ? How is it obtained, and on what 

 does its chief use depend ? 



14. By what chemical tests would you recognise a metallic 

 chloride ? 



