Question

A Tick () the correct answer.
1. Which of the following is not a primary
fuel?
a. Animal dung b. Charcoal
c. Wood
d. Coal
2. Which of these
necessary for
combustion?
a. Combustible substance
b. High calorific value
c. Absence of air
d. High ignition temperature
3. A luminous flame is ................. in colour
a blue
b. dark
c. yellow
d. red
82​

Answer 1

Answer:

1. b charcoal
2. d high ignition temperature
3. a blue

Answer 2

Answer:

1.charcoal

2.combustible substance

3.yellow

EXPLANATION

• as charcoal is man-made
• as air is required and combustion can occur in minimum ignition temperature no necessity of high