Two liquids A and B on mixing produce a warm solution which type of deviation from Raoult's law does it show? (b) The vapour pressures of pure liquids A and B are at , respectively. Find out the composition of a liquid mixture of total vapour pressure . Also find the composition of the vapour phase. 450 and 700mm of Hg 350K 600mmof Hg .

The activity series is shown in the attached picture. if the element is below the other, then you can displace the other. following the activity series as a guide, the reactions are as follows: nickel and aluminum chloride3 ni + 2 alcl₃  → 3 nicl₂ + 2 albarium and copper bromideba + cubr  →  no reaction because cu is less oxidizable than bapotassium nitrate and aluminum3 kno₃ + al  → al(no₃)₃ + 3 ksodium phosphate and zincnaso₄ + zn  → znso₄ + na

Heat is involved in chemical change in two ways; chemical changes either result in heat being added to or removed from an object, and chemical changes require a certain amount of heat before they can take place.