A current of 1.5A is passed through 500 mL of 0.25M solution of zinc sulphate for 1 hr with a current efficiency of 90%. Calculate the final molarity of `Zn^(2+)` assuming volume to be constant.

A current of 4 amp was passed for 1.5 hours through a solution of copper sulphate when 3.2 g of copper was deposited. Calculate the current efficiency.

A potential difference of 20 V applied to the ends of a column of 0.1 M AgNO_(3) solution, 4 cm in diameter and 12 cm in length have a current of 20 A. calculate the molar conductance of the solution.

A current of 5.0 A flows through each of two parallel long wires. The wires are 2.5 cm apart. Calculate the force acitng per unti length of each wire. Use standard value of constant required. What will be the direction of force, if both curents flow in the same direction?

100mL of H_(2)SO_(4) solution having molarity 1M and density 1.5g//mL is mixed with 400mL of water. Calculate final molarity of H_(2)SO_(4) solution, if final density is 1.25g//mL ?

Three conductivity cells A, B and C containing solutions of zinc sulphate, silver nitrate and copper sulphate respectively are connected in series. A steady current of 1.5 amperes is passed through them until 1.45 g of silver is deposited at the cathode of cell B. How long did the current flow ? What mass of copper and what mass of zinc got deposited in their respective cells ? (Atomic mass : Zn = 65.4 u, Ag = 108 u, Cu = 63.5 u)

The density of 10% by mass of KCI solution in water is 1 . 0 6 g mL^(-1) . Calculate molarity and molality of the solution

2.5 litre of 1 M NaOH solution are mixed and another 3 litre of 0.5 M NaOH solution. Then the molarity of the resulting solution is

20 waves pass through a point in 2 seconds. If the distance between one crest and adjacent through it 1.5m, calculate the frequency

1M HCl and 2 M HCl are mixed in volume ratio 4:1. What is the final molarity of HCl solution?

The molar conductivity of 1.5 M solution of an electrolysis is found to be 138.9 S cm^2 mol^-1 . Calculate the conductivity of this solution?