Acids, Bases and Salts — Advanced

Grade 8 Science — Acids, Bases and Salts — Advanced: 25 practice questions with instant scoring and explanations.

1. Litmus indicator turns red in the presence of:
2. Turmeric indicator turns yellow in:
3. China rose indicator (Hibiscus) turns:
4. The pH scale ranges from:
5. A pH value of 7 indicates a:
6. A solution with pH less than 7 is:
7. A solution with pH greater than 7 is:
8. Hydrochloric acid (HCl) is a:
9. Sodium hydroxide (NaOH) is a:
10. Sodium chloride (NaCl) is produced when:
11. The process by which an acid and base react to form a salt and water is called:
12. When HCl reacts with NaOH, the products formed are:
13. Lemon juice is:
14. Baking soda (sodium bicarbonate) is:
15. Table salt (NaCl) has a pH that is:
16. Universal indicator paper is used to:
17. Soap is made by reacting a fat with:
18. Antacids used to treat heartburn are:
19. The pH of human blood is approximately:
20. Rain water that contains dissolved CO₂ becomes:
21. A salt formed from a strong acid and strong base will have a pH that is:
22. When a neutral salt solution turns blue litmus paper red, it indicates:
23. The indicator that shows the most sensitive colour changes across the pH range is:
24. Calcium hydroxide [Ca(OH)₂] is used in agriculture to:
25. When an acid in excess reacts with a base, the resulting solution will be: