39. Which of the following will lead to changes which cannot be reversed?
A. Addition of water to salt
B. Addition of water to cement
C. Addition of water to plaster of Paris
D. Pouring of water on hot iron rim of a cart wheel
(a) A and B
(b) B and C
(c) C and D
Answers
Answered by
5
Answer:
Answer is B Addition of water to cement n addition of water to plaster of paris
Answered by
0
Answer:
B and C✓
Explanation:
Addition of water and cement is irreversible change.
Addition of water to plaster of Paris (pop) is irreversible change
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