salt solutions would coagulate colloid |Surface Chemistry

JEE MAIN 2023

29-1-23

Question

Which of the following salt solutions would coagulate the colloid solution formed when FeCl3 is added to NaOH solution, at the fastest rate?

Select the correct option:

10 mL of $0.2 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{AlCl}_3$

10 mL of $0.1 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{Na}_2 \mathrm{SO}_4$

10 mL of $0.1 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{Ca}_3\left(\mathrm{PO}_4\right)^2$

10 mL of $0.15 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{CaCl}_2$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Sol. Formed is negatively charged solution, therefore Al3+ has highest coagulating power

Question Tags

JEE Main

Chemistry

Easy

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