Question

Give reason
When we place a glass tube in
dark zone of candle blame and
blace a lighted matchstick on
other end of the tube, it catches
fire​

Answer 1

Answer:

because dark zone of the candle flame contains wax vapour and has a low ignition temperature therefore it catches fire.

Explanation:

Candle has many zones

the dark one is black coloured and contains wax vapours which has a very low ignition temperature that gets evaporated with the heat of the candle flame through one end of the glass tube to another end and when placed a lighted match stick near other end the low ignition temperatured wax vapours catches fire.

Answer 2

Answer:

Because in the dark zone of candle flame there are present some unburnt combustible substances and when we put a glass in the dark zone that combustible substances come in contact with the glass and can even go to the other end of the glass , so there are combustible substances present in the other end and when we light the match stick and place in contact with glass , the glass catches fire .