Question

Which of the following are chemical changes?

a. Boiling of water

b. Mixing of Sulphur powder and Iron filings

c. Growth of a plant

d. Curdling of milk

2. Give any two methods to check whether the given sample

of water is pure or not? correct answers will be marked brainiest and wrong answers will be reported​

Answer 1

Answer:

chemical changes- curdling of milk

mixing of sulphur powder and iron filings

sorry but I know this much only

Answer 2

Answer:

1.c. Growth of a plant

2.You can easily find out whether the water is pure or impure by boiling it. After boiling if all the water is evaporated nothing is left behind in the utensil then the water is completely pure. If there is something left in the utensil after the process of evaporation then the water is said to be impure.

Thanks.