Zones of Candle Flame

Q.

Abida and Ramesh were doing an experiment in which water was to be heated in a beaker . Abida kept the beaker near the wick in the yellow part of candle flame . Ramesh kept the beaker in the outermost part of the flame. Whose water will get heated in a shorter time.

Q. Air ______ on heating but _______ on cooling.

1. contract, expand
2. expand, remains the same
3. contract, remains the same
4. expand, contract

Q.

Middle zone is the hottest zone of a flame.

1. True
2. False

Q.

The middle region of a candle flame has limited supply of oxygen and partial burning takes place there. The temperature here is:

1. 2 > 3 > 5 > 4 > 1

2. 1 > 3 > 4 > 5 > 2

3. 3 > 2 > 5 > 4 > 1

4. 2 > 3 > 4 > 5 > 1