MCQ
The correct order of $K_a$ in aqueous solution at $298\, K$
- A$H_2O > H_2S > H_2Se > H_2Te$
- B$H_2Te > H_2Se > H_2S > H_2O$
- C$H_2O > H_2Te > H_2Se > H_2S$
- ✓None of these
✓
Answer
Correct option: D.
None of these
d
$\mathrm{Pbs}, \mathrm{CuS}, \mathrm{As}_{2} \mathrm{~S}_{3}, \mathrm{CdS}$ are soluble in $50\, \% \,\mathrm{HNO}_{3}$ $\mathrm{HgS}, \mathrm{Sb}_{2} \mathrm{~S}_{3}$ are insoluble in $50\, \%\, \mathrm{HNO}_{3}$
$\mathrm{Pbs}, \mathrm{CuS}, \mathrm{As}_{2} \mathrm{~S}_{3}, \mathrm{CdS}$ are soluble in $50\, \% \,\mathrm{HNO}_{3}$ $\mathrm{HgS}, \mathrm{Sb}_{2} \mathrm{~S}_{3}$ are insoluble in $50\, \%\, \mathrm{HNO}_{3}$
So Answer is $4 .$
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