Ethanoic anhydride using ketene

Write the reaction of formation of maltose from its monomers giving appropriate structures with proper labeling.

The resistance of a conductivity cell filled with an electrolytic solution is observed to be 180 Ω. If the resistance of 0.1M KCl solution taken in the same cell was found to be 72 Ω calculate the conductivity of the given solution. (Given: The conductivity of 0.1 M KCl solution = 1.29 S m-1 ).

How can you prepare 1,3,5-tribromobenzene? Why it cannot be prepared by bromination of benzene ?

Standard hydrogen electrode

(a) “A four phase equilibrium is not possible in a one component system.” Justify the statement.

Draw and explainthe vapour pressure curve of a solution showing positive deviation from Raoult’s law.