Q.3 Name three liquids, which when tested in the manner shown in Fig, may cause the magnetic needle to deflect.

Liquids like lemon juice, salt water and vinegar will allow the electricity to pass through them.

Lemon juice has citric acid in it. When lemon juice is added to water, the acid dissociates into anions and cations which are charged particles or ions. As these charged particles are able to flow inside the acid, hence they can conduct electricity.

Salt water has sodium ions and chlorine ions which are conducting particles. Hence salt water can conduct electricity.

Vinegar has acetic acid in it. When vinegar is added to water, the acid dissociates into anions and cations which are charged particles or ions. As these charged particles are able to flow inside the acid, hence they can conduct electricity.