NDA2016General AbilityGeneral ScienceActual
When one strikes a safety mat, the first step is
Options
- Aburning of sulfur
- Bdecomposition of potassium chlorate into potassium chloride and oxygen
- Cconversion of a small amount of red phosphorus into white phosphorus
- Dburning of glue and starch
Correct answer
C. conversion of a small amount of red phosphorus into white phosphorus
Step-by-step solution
If we rub the match stick against the striking surface, the friction generated causes some of the red phosphorus present to turn into white phosphorus. White phosphorus is highly sensitive and volatile, it ignites spontaneously in the air, making a flame.