what happens when 1)paper 2)aluminium sheet is wound round a wooden cylinder and heated over bunsen burner?
1) The paper will catch fire and burnDepending on how much paper there is and how long the whole apparatus is held over the flame the wooden cylinder might catch fire too2) In the short run, nothing will happen except the aluminum gets hotAfter some time passes the wooden cylinder on the inside will start to scorch from touching the hot aluminumAfter even more time passes the wooden cylinder might catch fire, if some part of it is exposed to the air.