A silkworm feeds on ___________ leaves.

Silk was first discovered and then developed in ______________.

Apples contain _____________ acid.

The pH of pure water is

The sharp pain caused due to the sting of red ants is due to ____________ acid.

Water soluble bases are also called _____________.

__________________ is commonly used in soda acid type fire extinguishers.

____________ turn blue litmus to red.

Acetic acid (which is commonly used in vinegar) is a _________ acid.