Question

which of the following items on the lab bench could ignite students clothing and hair? click on the single best answer.
flame from bunsen burner
test tube
test tube rack
chemical substances in dropper bottles and test tube

Explanation:

A Bunsen burner flame produces heat and an open flame, which can easily ignite flammable materials like clothing and hair. A test tube, test tube rack, and typical chemical substances in dropper bottles/test tubes (unless highly flammable and exposed to an ignition source) do not inherently have the ability to ignite clothing and hair on their own.

Answer:

Flame from Bunsen burner