Sulfur is melted.
When sulphur is heated in the test tube in the absence of air the sulphur will break down and form a red-brown liquid. If oxygen comes into play sulphur dioxide is produced, however you should not that sulphur dioxide is a highly toxic gas and should only be produced in small amounts under a fume hood.
ZnCO3, when heated in the absence of air, decomposes to give ZnO and CO2. I think this is the answer.
coal tar
The bottle will collapse when the bottle has heated air
Because the oxygen in the air would cause it to combust rather than turn into coke (+coal gas).
Sulfur is melted.
When sulphur is heated in the test tube in the absence of air the sulphur will break down and form a red-brown liquid. If oxygen comes into play sulphur dioxide is produced, however you should not that sulphur dioxide is a highly toxic gas and should only be produced in small amounts under a fume hood.
ZnCO3, when heated in the absence of air, decomposes to give ZnO and CO2. I think this is the answer.
coal tar
The air expands.
It will not burn.
The bottle will collapse when the bottle has heated air
the air in the container expands
Nobody has any idea of what you are talking about...
when the carbonate is heated in absence of air then the CO2 is produced as the byproduct .
Generally, if air is heated, its temperature will increase. And if the pressure remains constant, its density will decrease.
Solid iron oxide and a poisonous called sulphur dioxide