Question

Section B (Subjective Type Questions
A. Very short answer questions
1. Which of these is generally reversible - physical change orch
..
2. What type of change is freezing of water?
.
.
.
ben for some time
3. What will happen to a piece of iron if it is left in the open for sor
.
.....
4. What is blue vitriol?
5. What type of change is called chemical reaction?
58 Workbook Science-7​

Answer 1

Answer:

1) physical

2) physical

3) a brownish substance called rust will be seen

4) crystalline copper sulphate

5) chemical or physical