Give an example of a chemical reaction for each of the following situations:
A change in colour is observed.
A gas is evolved.
Sound is produced.
Formation of precipitate.
Change of state from liquid to gas.
Change of state from gas to liquid.
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colour cuco3(green) ->cuo(black) + co2(colourless)
gas zn + h2so4 -> znso4 + h2 ^
precipitate agno3 + nacl -> agcl2(ppt) + nano3
thats all i knoww
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