Bee sting leaves an acid which causes pain and irritation. The acid released is

Which one among the following is present in the nettle leaf hairs that causes burning pain ?

Which one of the following acid is used by goldsmith for cleaning of gold and silver articles?

Which of the following is an acid-base indicator?

The reaction between an acid and a base to give a salt and water is known as a ______________ reaction.

Which one of the following acids is produced in human stomach?