A, B and C are three electrolytic cells, connected in different circuits. Cell ‘A’ contains NaCl solution, and the bulb in the circuit glows brightly when the circuit is completed. Cell ‘B’ contains acetic acid in which the bulb glows dimly. Cell ‘C’ contains sugar solution inwhich the bulb does not glow. Give a reason for each observation. [3 Marks]

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Solution

Sodium chloride solution (NaCl), being a strong electrolyte, completely furnishes ions in an aqueous solution. Hence, the NaCl solution is a good conductor of electricity due to the free ions, and hence the bulb glows brighter. [1 Mark]

Acetic acid being a weak electrolyte only partially furnishes ions in an aqueous solution. So, acetic acid is a weak conductor of electricity, and hence the bulb glows dimly. [1 Mark]

Sugar being a non-electrolyte does not furnishes ions in an aqueous solution. So, it does not conduct electricity, and hence the bulb does not glow. [1 Mark]

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Similar questions

Q. Three different electrolytic cells A, B and C are connected in separate circuits. Electrolytic cell A contains sodium chloride solution. When the circuit is completed a bulb in the circuit glows brightly. Electrolytic cell B contains acetic acid solution and in this case the bulb in the circuit glows dimly. The electrolytic cell C contains sugar solution and the bulb does not glow. Give a reason for each of these observations.

(a) Select the correct answer.

A compound which during electrolysis in its molten state, liberates a reddish brown gas at the anode.

(i) Sodium chloride

(ii) Copper [II] oxide

(iii) Copper [II] sulphate

(iv) Lead [II] bromide

(b) During electroplating of an article with nickel,

(i) Name

A. The electrolyte

B. The cathode

C. The anode

(ii) Give the reaction of the electrolysis at

A. The cathode

B. The anode

(c) A, B and C are three electrolytic cells, connected in different circuits. Cell 'A' contains NaCl soln., and the bulb in the circuit glow brightly, when the circuit is completed. Cell 'B' contains acetic acid and the bulb does not glow. Give reason for each observation.

Q. A, B and C are three electrolytic cells, connected in different circuits. Cell ‘A’ contains NaCl solution, and the bulb in the circuit glows brightly when the circuit is completed. Cell ‘B’ contains acetic acid and the bulb glows dimly. Cell ‘C’ contains sugar solution, and the bulb does not glow. Give a reason for each observation.

Q. Assertion :A, B & C are three electrolytic cells, connected in different circuits. Cell 'A' contains

N a C l

solution, and the bulb in the circuit glows brightly when the circuit is completed. Cell 'B' contains acetic acid and the bulb glows dimly. Cell 'C' contains sugar solution, & the bulb does not glow. Reason:

N a C l

is strong electrolyte so it dissociates completely into ions. Acetic acid is weak electrolyte so it dissociates very less. Sugar is non-electrolyte so it doesn't dissociates into ions.

why does aa bulb does not glow in a circuit whose wires are connected to the same terminals of a cell?

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