ICSE Class 10 Electrochemistry — Mock Test (2027)

Free online mock test for Electrochemistry (ICSE Class 10 Chemistry) — 102 competency-based questions based on the latest CISCE 2027 syllabus, with instant marking. Try the samples below, then take the full test free.

Sample questions

1. 1.Why is an alternating current (AC) source, rather than direct current, used to measure the resistance of an ionic solution?
   • A.AC heats the solution and increases conductivity
   • B.DC current would change the composition of the solution by electrolysis
   • C.AC cannot pass through a metallic conductor
   • D.DC cannot be measured on a Wheatstone bridge
2. 2.A conductivity cell filled with 0.1 mol/L KCl (conductivity 1.29 S/m) has resistance 100 ohm. Using cell constant G* = conductivity x resistance, calculate the cell constant.
   • A.1.29 m^-1
   • B.12.9 m^-1
   • C.129 m^-1
   • D.77.5 m^-1
3. 3.The resistance of a conductivity cell containing 0.001 M KCl at 298 K is 1500 ohm. If the conductivity of this solution is 0.146 x 10^-3 S/cm, the cell constant is:
   • A.0.219 cm^-1
   • B.1500 cm^-1
   • C.0.146 cm^-1
   • D.2.19 cm^-1
4. 4.All of the following statements about hydrogen-oxygen fuel cells are correct EXCEPT:
   • A.Reactants are fed continuously to the electrodes and products removed continuously
   • B.The cell was used to provide electrical power in the Apollo space programme
   • C.Fuel cells produce electricity with an efficiency of about 40 percent compared to 70 percent for thermal plants
   • D.Finely divided platinum or palladium is used as a catalyst on the electrodes
5. 5.Given Lambda zero m for NaCl = 126.4, HCl = 425.9 and NaAc (sodium acetate) = 91.0 S cm2 per mol, the limiting molar conductivity of acetic acid (HAc) by Kohlrausch's law is:
   • A.643.3 S cm2 per mol
   • B.390.5 S cm2 per mol
   • C.461.3 S cm2 per mol
   • D.208.5 S cm2 per mol