As per your request here I am sharing the IIT JEE Last year papers for chemistry:

29. The carboxyl functional group
(A) picric acid (B) barbituric acid
(C) ascorbic acid (D) aspirin
Ans. (D)

Choose the correct reason(s) for the stability of the lyophobic colloidal particles.
(A) Preferential adsorption of ions on their surface from the solution.
(B) Preferential adsorption of solvent on their surface from the solution.
(C) Attraction between different particles having opposite charges on their surface.
(D) Potential difference between the fixed layer and the diffused layer of opposite charges around the colloidal
particles.







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Attached Files

IIT JEE Last year papers for chemistry(1).pdf (295.9 KB, 91 views)