Visual Indicators

Q.

Give 3 examples of olfactory indicators.

Q. When turmeric juice is added to vinegar then the colour of the solution:

1. changes to brick red.
2. changes to blue.
3. does not changes.
4. changes to green.

Q. We make idols out of clay. Can we get clay back from the idols? What kind of change is it?
​ (3 marks)