1. CHEMISTRY DEPARTMENT WAID ACADEMY Unit 1 Acids and Alkalis

2. Acid solutions have a pH value of 1.Between 5 and 9. 2.Equal to 7. 3.Less than 7. 4.More than 7 12

3. Pure water has a pH value of 1.3 2.6 3.7 4.9 12

4. Which of the following pH values shows the most alkaline solution? 1.1 2.6 3.9 4.14 12

5. The pH scale goes from 1.Below 0 to above 14 2.0 to 10 3.1 to 13 4.5 to 12 12

6. In which line are all three substances acidic? 1.vinegar, baking soda and oven cleaner 2.lime water, Coke and lemonade 3.bleach, baking soda and limewater 4.vinegar, Coke and lemonade 16

7. In which line are all three substances alkaline? 1.vinegar, baking soda and sodium hydroxide 2.sodium hydroxide baking soda and limewater 3.lime water, Coke and lemonade 4.lime water, Coke and ammonia solution 16

8. Which is a true statement about what happens when water is added to an acid solution? 1.The pH rises and the acidity decreases. 2.The pH decreases and the acidity decreases. 3.The pH rises and the acidity increases 4.The pH decreases and the acidity increases 20

9. The salt formed when nitric acid is neutralised using potassium hydroxide is 16 1.Potassium chloride 2.Potassium nitrate 3.Sodium nitrate 4.Potassium sulphate

10. Which line shows the products of the reaction between an acid and a metal carbonate? 1.A salt and water 2.Water and carbon dioxide 3.A salt and hydrogen. 4.A salt, water and carbon dioxide 20

11. Which line shows the two gases mostly responsible for causing acid rain? 20 1.Carbon dioxide and oxygen 2.Sulphur dioxide and carbon dioxide 3.Sulphur dioxide and nitrogen dioxide 4.Nitrogen dioxide and carbon dioxide