Question

Choose the correct option.
1. The colour of the flame depends upon:
a. temperature
b. amount of air available
C. nature of the substance burning d. All of these
2. What burns in a candle flame?
a. Solid wax b. Liquid wax C. Wax vapours
d. Oxygen
3. Which of the following is produced in incomplete combustion of hydrocarb
a. Carbon dioxide
b. Carbon monoxide
c. Oxygen
d. Methane
4. Which of the following is a characteristic of an ideal fuel?
a. High calorific value
b. High rate of combustion
c. Low ignition temperature
d. Should cause pollution​

Answer 1

Answer:

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Answer 2

Answer:

1.(c)nature of the substance burning.

2.(d) oxygen.

3.(b)carbon monoxide.

4.I not know this answer.

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