Question

Which chemical causes pain and burning sensation when somebody accidentally touches ‘nettle plant’?

Answer 1

Answer:

The Accidental touch of nettle leaves creates a burning sensation because it injects formic acid, acetylcholine and histamine when its cell sap are under pressure

Answer 2

Nettle plant injects methanoic acid when touched

Explanation:

Urtica dioica, commonly known as the nettle or stinging nettle is a herbaceous perennial flowering plant.

Originally, this plant was a native of Europe, temperate Asia and western North Africa, but it is now found worldwide, including New Zealand and North America.

The leaves and stem of this plant have many hollow stinging hairs called trichomes. These needles act like hypodermic needles and inject a histamine when touched. This creates stinging sensation upon contact. Hence the name stinging nettle.  

The chemical injected by these needles is the methanoic acid. The burning sensation can be treated by rubbing baking soda on the skin.