MATCH THE FOLLOWING EXAMPLES WITH CHANGES CHARACTERIZING A CHEMICAL REACTION. *
part A
Evolution of gas
Sound
Energy changes
Light
Smell
part B
Freezing of water
Formation of H2S
Heating of lead nitrate
Sulphur burnt in air
Reaction between zinc and dilute HCl
Freezing of water
Formation of H2S
Heating of lead nitrate
Sulphur burnt in air
Reaction between zinc and dilute HCl
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