Match the following for the flame of the candle. Column I Column II Column III (a)Hottest part (i)Innermost zone of unburnt wax vapours (x)Blue (b)Moderately hot (ii)Middle zone of partial combustion (y)Black (c)Least hot (iii)Outer zone of complete combustion (z)Yellow

The hottest part of the flame is the outermost zone with complete combustion having blue colour. This zone is used by goldsmith for their work. Moderately hot part of the flame is the middle part of it having partial combustion and it is yellow colour. It is the luminous zone. It consists of soot particles. Least hot is the innermost zone of unburnt wax vapours which are black. The movement of molten wax up away from the wick is due to phenomena called capillary action. Column I Column II Column III (a) Hottest part (iii) Outer zone of complete combustion (y)Blue (b)Moderately hot (ii) Middle zone of partial combustion (z)Yellow (c) Least hot (i) Innermost zone of unburnt wax vapours (x)Black

E M B I B E

All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Practice>Q 2

MEDIUM

8th CBSE

IMPORTANT

Earn 100

Match the items in column I with the items of column II.

Column I Column II

(a) LPG (i) Non-combustible

(b) Iron nails (ii) Deforestation

(c) Candle (iii) Cooking gas

(d) Wood (iv) Flame

Important Questions on Combustion and Flame

MEDIUM

8th CBSE

IMPORTANT

All in One - SCIENCE CBSE Class 8>Chapter 6 - Combustion and Flame>Chapter Practice>Q 3

Match the following for the flame of the candle.

Column I	Column II	Column III
(a)Hottest part	(i)Innermost zone of unburnt wax vapours	(x)Blue
(b)Moderately hot	(ii)Middle zone of partial combustion	(y)Black
(c)Least hot	(iii)Outer zone of complete combustion	(z)Yellow