Question

give reasons for the following
(I)concentrated sulfuric acid bottles if fully filled till neck and kept open, overflow.
(ii) only direct current is used for electrolysis not alternating current.​

Answer 1

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I)Sulphuric acid is highly hygroscopic i.e it will attract water molecules immediately from its vicinity. If kept open then it will absorb moisture from atmosphere and its concentration will change and it may no longer have the exact acid to water ratio. Second reason is for safety.

ii) We cannot use Alternate current for electrolysis because of the following reasons : The direct current helps to deposit the anions in the anode and the cations in the cathode. ... The polarity of the current will change every half and hence the deposition of ions will be a faulty one.

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Answer 2

Answer:

I)Sulphuric acid is highly hygroscopic i.e it will attract water molecules immediately from its vicinity. If kept open then it will absorb moisture from atmosphere and its concentration will change and it may no longer have the exact acid to water ratio. Second reason is for safety.

ii) We cannot use Alternate current for electrolysis because of the following reasons : The direct current helps to deposit the anions in the anode and the cations in the cathode. ... The polarity of the current will change every half and hence the deposition of ions will be a faulty one.