20 multiple choice questions to test your understanding.
See answers immediately after selecting
Q1. Which indicator turns pink in a basic solution?
Q2. The pH of pure water is:
Q3. When an acid reacts with a metal carbonate, the gas evolved is:
Q4. The chemical formula of plaster of Paris is:
Q5. Tooth enamel starts to corrode when pH in the mouth is:
Q6. Which of the following is a strong acid?
Q7. The process of dissolving acid in water is:
Q8. Baking soda is chemically:
Q9. The chemical formula of washing soda is:
Q10. Bleaching powder is prepared by the action of chlorine on:
Q11. Why does dry HCl gas not change the colour of dry litmus paper?
Q12. Blue copper sulphate crystals turn white on heating because:
Q13. A bee sting can be treated with:
Q14. The chlor-alkali process produces all of the following EXCEPT:
Q15. Which gas burns with a 'pop' sound?
Q16. Metal oxides are generally:
Q17. Non-metal oxides are generally:
Q18. Gypsum has the formula:
Q19. The pH of gastric juice (stomach acid) is approximately:
Q20. Which salt is used to soften hard water?