Question

Study the given Venn diagram.
respectively.
If 1 represents slaking of lime and
2 represents decomposition of calcium carbonate then P, Q and R could be respectively:
(A) Reversible change, irreversible change and physical change
(B) Periodic change, non-periodic change and physical change
(C) Exothermic change, endothermic change and chemical change
(D) Endothermic change, exothermic change and chemical change.​

Answer 1

Answer:

state and prove RHS congruence rule (with clear steps)

Answer 2

Answer

C

Explanation

composition of calcium carbonate is an endothermic chemical change as calcium carbonate breaks into calcium oxide and carbon dioxide by absorption of heat. slaking of Iime releases a lot of heathens it is an exothermic chemical change

therefore we should be exothermic Q should be adothermic and are should be chemical change