Question

Tick () the correct answer.
1. The minimum temperature at which a substance catches fire is called its
(a) Fire zone
(b) Fire triangle
(c) Ignition temperature
(d) Extinguishing temperature
2. Which one of the following is a combustible substance?
(a) Wood
(b) Marble
(c) Platinum
(d) Glass
3. Which of the following is not used to put out fire?
(a) Water
(b) Sand
(c) Carbon dioxide
(d) Paraffin wax
4. The black residue left behind during incomplete combustion is
(a) Soot
0 (b) Ash
o (c) Wax
(d) Fuel
5. The temperature of the middle zone of a candle flame is about
(a) 800°C
o (b) 1000°C
(c) 1200 °C
(d) 1400°C
6. A fuel gives yellow flame due to
(a) Incomplete combustion
(b) Complete combustion
(c) Spontaneous combustion
(d) Rapid combustion
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Answer 1

Explanation:

1. c

2. a

3. d

4. b

5.a

6.b

I tried , but most of them are correct :)

Answer 2

Answer:

1. (c)

2. (d)

3.(d)

4.(d)

5.(b)

6.(a)