An amount of20g potassium sulphate was dissolved in 150cm^(3) of water.The solution was then electrolysed.After electrolysis the content of potassium sulphate in the solution was 15% by mass Determine volume of the gases obtained at NTP ?(d_(H_(2)O)=1gcm^(-3))
`(A) 45.6LH_(2) gas
(B) 22.8LO_(2)gas
(C) 42LH_(2) gas
(D) None of these`

On electrolysis of a solution of dilute H_(2)SO_(4) between platinum electrodes , the gas evolved at the anode is (a) SO_(2) (b) SO_(3) (c) O_(2) (d) H_(2)

A solution of HCI is prepared by dissolving 7.30 g of hydrogen chloride gas in 100 ml of water. Find the molarity of the solution. If 50.0 cm^3 of this solution is treated with 3.50 g of zinc, what volume of H_2 measured at S.T.P. will be evolved ?

Electrolysis of aqueous solutions of which of the following substances results in only the decomposition of water ? 1) Potassium chloride 2) Zinc sulphate 3) Potassium hydroxide 4) Sodium phosphate

The strength in volumes of a solution containing 30.36 g/L of H_(2)O_(2) is (Given volume of 1 mole of gas STP = 22.4 litre)

12. g of an impure sample of arsenious oxide was dissolved in water containing 7.5 g of sodium bicarbonate and the resulting solution was diluted to 250 mL . 25 mL of this solution was completely oxidised by 22.4 mL of a solution of iodine. 25 mL of this iodine solution reacted with same volume of a solution containing 24.8 g of sodium thiosulphate (Na_(2)S_(2)O_(3).5H_(2)O) in one litre. Calculate teh percentage of arsenious oxide in the sample ( Atomic mass of As=74 )

A mixture of 200 mmol of Ca(OH)_2 and 3g of sodium sulphate was dissolved in water and the volume was made up to 200 mL. The mass of calcium sulphate formed and the concentration of OH^(-) in resulting solution, respectively, are: (Molar mass of Ca(OH)_2 , Na_2SO_4 " and " CaSO_4 are 74, 143 and 136 g mol^(-1) respectively, K_(sp) of Ca (OH)_2 is 5 xx 10^(-6) )

When aluminium oxide (Al_(2)O_(3)) is electrolysed for the production of aluminium metal. For a given quantity of electricty, the number of moles of aluminium obtained if the volume of O_(2) gas obtained is 201.6 litre measured at NTP, is

A solution of glycerol (C_(3)H_(8)O_(3)) in water was prepared by dissolving some glycerol in 500 g of water . This solution has a boiling point of 100.42 ^(@)C . what mass of glycerol was dissolved to make this solution ? ( K_(b) for water = 0.512 K kg mol^(-1) )

One litre sea water (d = 1.03g/ cm^3 ) contains 10.3 mg O_2 gas. Determine concentration of O_2 in ppm.

One litre sea water (d = 1.03g/ cm^3 ) contains 10.3 mg O_2 gas. Determine concentration of O_2 in ppm.