Question

why the colour of gas cylinder is always red?

Answer 1

LPG cylinders inflammable and thus dangerous, are painted red in color.

Answer 2

Answer:

Red colour light has the highest wavelength in the visible spectrum. So, it is visible even from a long distance. Red colour is used for anything which is dangerous or urgent. As we know that LPG is highly inflammable, it is painted red for the safety of the consum