Which of the following is used as a catalyst in Friedel craft reaction?

Talcum powder has a slippery touch.

Half many five-membered rings are there in fullerenes?

which of the following is not a part of the composition of natural gas?

What is the chemical formula of the mineral colemanite?

Do Boron and silicon react with electropositive metals?

Complex formation is more likely to be possible in ______

Tincal is ________