Question

The characteristics of non-combustible substances is/are:

• A. They do not ignite
• B. They do not support combustion
• C. They are not volatile
• D. All of the above

Answer 1

Answer: (D)

Certain substances cannot be burnt in the presence of air. Such substances are called non-combustible substances.

Non-combustible material – A non-combustible material is a substance that does not ignite, burn, support combustion.

Even if a non-combustible substance is exposed to flame, it will not combust.

Non-Volatile Substance- A non-volatile substance refers to those substances that do not readily vaporize or evaporate into the gas at room temperature.

Non-combustible substances are non volatile.