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STD 12 - p -Block elements - ll — NEET STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceNEETSTD 12 - p -Block elements - ll4 Marks
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 $50\, \%\, \mathrm{HNO}_{3}$

So Answer is $4 .$

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