Give reasons for the following: (a) At higher altitudes, people suffer from a disease called anoxia. In this disease, they becomeweak and cannot think clearly. (b) When mercuric iodide is added to an aqueous solution of KI, the freezing point is raised.

Give reasons for the following: (a) At higher altitudes, people suffer

1.	Give reasons for the following: (a) At higher altitudes, people suffer from a disease called anoxia. In this disease, they becomeweak and cannot think clearly. (b) When mercuric iodide is added to an aqueous solution of KI, the freezing point is raised.
Answer» Solution : (a) At higher altitudes, available oxygen is less, CAUSING anoxia. (b) ` underset("1mol")(HgI_2) + underset("2 mol")(2KI) to underset("potassium tetraiodomercurate (II)")(K_2HgI_4)` Due to the FORMATION of complex compound`K_2HgI_4` , the number of moles of the solute in the solution decreases. Greater the number of moles of the solute in the solution, greater the depressionin FREEZING point. Smaller the number, the REVERSE effect will take place