(i) A local magician was showing magic in a village street. He took egg shell and poured a solution over it. As a result, effervescences were formed. When he took a burning matchstick over it, it went off. (a) Identify the solution poured and the substance present in eff shell. (b) What is the reason behind effervescences? ( c) Write its balanced chemical equation. (d) Give the common name of the substance present in the egg shell. (ii) Draw a labelled diagram to show that acid solution in water conducts electricity.

(i) A local magician was showing magic in a village street. He took eg

1.	(i) A local magician was showing magic in a village street. He took egg shell and poured a solution over it. As a result, effervescences were formed. When he took a burning matchstick over it, it went off. (a) Identify the solution poured and the substance present in eff shell. (b) What is the reason behind effervescences? ( c) Write its balanced chemical equation. (d) Give the common name of the substance present in the egg shell. (ii) Draw a labelled diagram to show that acid solution in water conducts electricity.
Answer» Solution :(i) (a) Solution is an acid. Substance in egg shell is calcium carbonate. (B) Effervescence is due to the EVOLUTION of `CO_2` gas. (C) `2HNO_3+CaCO_3 to 2Ca(NO_3)_2+H_2O+CO_2` (d) Lime stone. (II)