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it colour changes to black,and vapour produced condensed on the cooler part of the test tube to form"silver mirror" A colourless and odourless gas produced,rekindles the glowing splinter.
Mercuric oxide
on heating the red compound ,the colour changes to yellow .A colourless gas evolves rekindles the glowing splinter,
Red lead
A chocolate crown compound on heating the colour changes to yellow ,A colourless odourless gas produced which rekindles the glowing splinter
Lead dioxide
On heating this light green or bluish green the colour changes to black ,the gas evolved turns moist blue litmus paper wine red and lime water milky
Copper carbonate
On heating this white compound the colour changes to yellow when substance is heated and back to white on cooling ,a colourless and odourless gas evoved ,which turns lime water milky and moist litmus paper wine red
Zinc carbonate