Acids, bases and salts Worksheet-1

Acids, bases and salts Worksheet-1

Fill in the blanks:

1. Acids change the colour of litmus solution to ________.

2. Bases change the colour of litmus solution to ________.

3. Salts ________the colour of litmus solution.

4. Substances which change colour or odour in acidic or basic medium are called ________.

5. The colour of methyl orange in acidic and basic medium is ________ and________.

6. The colour of phenolphthalein in washing soda solution is ________.

7. The colour of moist litmus paper in calcium sulphate is ________.

8. H₂CO₃  is the formula of________.

9. The colour of universal indicator is ________ in acidic medium.

10. The point at which indicator shows colour change is called ________.

11. What is the chemical name of Plaster of Paris?

12. Which of the following salts have blue colour?

(a) CuSO₄.5H₂O            (b) CuSO₄

13. The pH of a solution is ________ proportional to the concentration of hydrogen ions in it.

14. Acidic solutions have ________ of hydrogen ions and ________ hydroxide ions.

15. The pH of sugar solution will be ________

Answer Key:

1. Red

2. Blue

3. Do not change

4. Indicators

5. Red, yellow.

6. Pink

7. Red

8. Carbonic acid

9. Red

10. End point

11. calcium sulphate hemi-hydrate

12. A

13. Inversely

14. Excess, less

15. 7