Soap, removes grease by –

Soaps are formed by the reaction of ……….. with caustic soda.

An active chemical to remove mosquitoes is-

Which one of the following is used in the manufacture of soaps?

A student studies that a soap molecule has two ends, one of which is an ionic end and the other is carbon chain. Which of the following option explains the interaction of soap molecule with oil?

Which one of the following living organisms gives litmus?