Question

LPG catches fire at room temperature but wood does not because

Answer:

1) ignition temperature of wood is less than LPG.
2) ignition temperature of LPG is less than wood.
3) wood is not a combustible substance.
4) LPG is not a combustible substance.​

Answer 1

$\huge\underline{\overline{\mid{\bold{\red{Answer}}\mid}}}$

2) ignition temoerature of LPG is less than wood

It is more difficult to burn some combustible substances than others because different substances catch fire at different temperatures. Some substances have a low ignition temperature; therefore, they can catch fire more easily than others.

Hope it helps you.....