COMEDK · Chemistry · 33. Practical Chemistry
In qualitative analysis, in order to detect second group basic radical, \(\mathrm{H}_{2} \mathrm{~S}\) gas is passed in the presence of dilute HCl to
- A decrease the dissociation of \(\mathrm{H}_{2} \mathrm{~S}\)
- B increase the dissociation of salt solution
- C increase the dissociation of \(\mathrm{H}_{2} \mathrm{~S}\)
- D decrease the dissociation of salt solution
Answer & Solution
Correct Answer
(A) decrease the dissociation of \(\mathrm{H}_{2} \mathrm{~S}\)
Step-by-step Solution
Detailed explanation
On passing \(\mathrm{H}_{2} \mathrm{~S}\) gas in presence of dil. \(\mathrm{HCl}\) for qualitative analysis of second group due to common ion effect, lower concentration of sulphide ions is obtained. It is sufficient for the precipitation of second group cations in forms of…
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