An appartus was set up. It was observed that when an aqueous solution of HCl was taken in the beaker and the circuit was closed, the bulb in the circuit glowed, but it didn't glow when the experiment was repeated with glucose solution. What is the reason?
Would the bulb glow if the experiment was repeated with an aqueous soluton of (i) NaOH and (ii) NaCl? Why?
Answers
The bulb glows in the rst case when an aqueous solution of HCl is taken because in this solution HCl
being strong acid is completely ionised to give H and Cl ions . Due to the presence of ions the aqueous
solution becomes conducting and the circuit is completed.
In case of Aqueous solution of glucose , glucose is a carbohydrate and a covalent compound which does
not ionise. Therefor glucose solution is non conducting and bulb does not glow.
Yes the bulb does glow if the experiment is repeated with aqueous solution of NaOH and NaCl. Because
both of these dissociate into ions when dissolved or when aqueous solution is prepared. NaOH ionises into
Na and OH and NaCl ionises into Na and Cl .
Explanation:
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