Concentrated sulphuric acid is added followed by heating to each of the following test tube labelled (1) to () Cane sugar Sodium Copper Sulphur Potassium bromide turnings powder chloride Identify in which of the above test tube the following changes will be observed. Support your answer with the help of chemical reaction. (a) Formation of black substance. (6) Evolution of a brown gas. (c) Evolution of a colourless gas. (d) Formation of brown substance which on dilution becomes blue. (e) Disappearance of yellow powder along with evolution of colourless gas.

Concentrated sulphuric acid is added followed by heating to each of the following test tubes labelled (i) to (v). Identify in which of the above test tube the following change will be observed. Support your answer with the help of a chemical equation. Disappearance of yellow powder along with evolution of colourless gas.

Concentrated H_2 SO_4 is added to the test tubes containing (a) to (e). {:("Test tube",,"Compounds"),(a.,,"Cane sugar"),(b.,,"sodium bromide"),(c.,,"Copper turnings"),(d.,,"Sulphur powder"),(e.,,"Potassium chloride"):} Identify in which of the above test tubes, the following change will be observed on heating. Also give the chemical equations involved. (i) Formation of black substance. (ii) Evolution of brown gas. (iii) Evolution of colourless gas. (iv) Formation of brown substance, which on dilution becomes blue. (v) Disappearance of yellow powder along with the evolution of a colourless gas.

Concentrated sulphuric acid is added followed by heating to each of the following test tubes labelled (i) to (v). Identify in which of the above test tube the following change will be observed. Support your answer with the help of a chemical equation. Formation of black substance.

Concentrated sulphuric acid is added followed by heating to each of the following test tubes labelled (i) to (v). Identify in which of the above test tube the following change will be observed. Support your answer with the help of a chemical equation. Formation of black substance.

Concentrated sulphuric acid is added followed by heating to each of the following test tubes labelled (i) to (v). Identify in which of the above test tube the following change will be observed. Support your answer with the help of a chemical equation. Evolution of brown gas.