Acids and Bases

15 Points Per Correct Answer - No time limit  

1. What colour is methyl orange in alkali conditions? Yellow Red Orange Blue

2. Why is universal indicator a better indicator to use than litmus indicator? Universal indicator gives the pH of the solution. Universal indicator goes green if something is neutral. Litmus indicator can only be used for acids. Litmus indicator can only be used for alkalis.

3. Which of the following substances when mixed together will produce table salt (sodium chloride)? Hydrochloric acid and sodium hydroxide. Chlorine and oxygen. Sodium thiosulphate and sulpur dioxide. Nitric acid and sodium hydrogen carbonate.

4. What colour would hydrochloric acid (pH 1) turn universal indicator? Red Yellow Orange Purple

5. If I react magnesium with hydrochloric acid, what gas is produced? Hydrogen Oxygen Carbon dioxide No gas is produced

6. Which of the following is the most accurate way of showing neutralisation? Acid + base ------> neutral solution There is no reaction between acids and bases Acid + base ------> sodium chloride + hydrogen Acid + base ------> salt + water

7. What are the products, if a reaction occurs between nitric acid and sodium hydroxide? Sodium hydrogenate + water No reaction Sodium nitrate + hydrogen Sodium nitrate + water

8. Aluminium will react with Hydrochloric acid. What are the products of this reaction? Aluminium + hydrogen No reaction Aluminium chloride + hydrogen Hydrogen chloride + aluminium

9. What are the products when silver reacts with dilute sulphuric acid? Silver sulphate + hydrogen Silver sulphide + hydrogen Silver sulphate + water Silver doesn't react with dilute sulphuric acid.

10. If a base will dissolve in water, by what name is it better known? Neutralisation Basic Acid Alkali