Question

A. Tick() the correct answer.

1. The substance having the highest calorific value is :
a) LPG
(b) hydrogen
(c) oxygen
(d) coal gas
2. Which of the following is a non-combustible substance?
A) Wood
(b) Coal
(C) Kerosene
(d) Sand
3. The type of combustion in which heat, light and sound is produced is :
(a) rapid
(b) explosion
(c) spontaneous
(d) none of these

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Answer 1

Answer:

1) option (B)

2) dk

3) option (A)

Answer 2

Answer:

Think so

Explanation:

1.hydrogen

2.Sand

3.spontaneous