TS EAMCET · Chemistry · Surface Chemistry
The charge of "SnO \({ }_2\)-sol" in alkaline and acidic medium are respectively (Hint \(\mathrm{SnO}_2\) is amphoteric oxide)
- A positive and positive
- B negative and negative
- C positive and negative
- D negative and positive
Answer & Solution
Correct Answer
(D) negative and positive
Step-by-step Solution
Detailed explanation
In alkaline medium, \(\mathrm{SnO}_2\)-sol is \(\left[\mathrm{SnO}_2\right] \mathrm{SnO}_3^{2-}\) \(\Rightarrow\) negatively charged. In acidic medium, \(\mathrm{SnO}_2\) sol is \(\left[\mathrm{SnO}_2\right] \mathrm{Sn}^{4+}\) \(\Rightarrow\) positively charged.
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