Question

1. The black residue left behind during incomplete combustion is
(a) Soot
(b) Ash
(c) Wax
(d) Fuel
2. The temperature of the middle zone of a candle flame is about
(a) 800°C
(b) 1000°C
(c) 1200 °C
(d) 1400°C
3. A fuel gives yellow flame due to
(a) Incomplete combustion
(b) Complete combustion
(c) Spontaneous combustion
(d) Rapid combustion
​

Answer 1

Answer:

1..soot

2..1400°C

3..chhe

Answer 2

Answer:

1. (b) ash

2. (b) 1000°

3. (b) complete combustion