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JEE 2020 Chemistry : Electrochemistry Quiz-1 (27.06.2019)
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Question 1
In hydrogen – oxygen fuel cell, combustion of hydrogen occurs to
Question 2
Two solutions of a substance (non electrolyte) are mixed in the following manner. 480 ml of 1.5 M first solution + 520 mL of 1.2 M second solution. What is the molarity of the final mixture?
Question 3
The molar conductivities of
and
at infinite dilution in water at 25 ° C are 91.0 and 426.2 S cm2/cm respectively. To calculate 
, the additional value required is
Question 4
The limiting molar conductivities Λ ° for NaCl, KBr and KCl are 126, 152 and 150 S cm2 mol-1 respectively. The Λ ° for NaBr is
Question 5
Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 Ω. The conductivity of this solution is 1.29 S m–1. Resistance of the same cell when filled with 0.2 M of the same solution is 520 Ω. The molar conductivity of 0.02 M solution of the electrolyte will be
Question 6
When an electric current is passed through acidified water, 112 mL of hydrogen gas at N.T.P. was collected at the cathode in 965 seconds. The current passed, in ampere,is :
Question 7
Which of the following reaction is possible at anode?
Question 8
Refining of impure copper with zinc impurity is to be done by electrolysis using electrodes as:
Question 9
The gas liberated by the electrolysis Dipotassium succinate solution is :
Question 10
In a cell that utilises the reaction Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g), addition of H2SO4 to cathode compartment will
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Oct 31JEE & BITSAT
