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Chemistry · 2022 · 2 marks
CBSE 2022 · Region 4 · Set 3 · Q2
Observe the given figure and answer the following questions: (Any two) (i) What is the charge on AgI colloidal particles? (ii) What is the reason for…
Observe the given figure and answer the following questions : (Any two)
(i)
What is the charge on AgI colloidal particles ?
(ii)
What is the reason for the origin of the charge on AgI ?
(iii)
If KI is added to $\displaystyle \mathrm{AgNO}_{3}$, what will be the charge on AgI colloidal particles?
Marking-scheme solution
(i) Negative charge / AgI / I \(\displaystyle { }^{-}\)
(ii) Due to preferential adsorption of iodide ions.
(iii) Positive charge / AgI / Ag \(\displaystyle { }^{+}\)
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CBSE Class 12 Chemistry past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.