JEE Main 2021 — Surface Chemistry Question with Solution
From: JEE Main 2021 (Online) 1st September Evening Shift
Question
Match List - I with List - II :
Choose the most appropriate answer from the options given below.
Choose the most appropriate answer from the options given below.
This question includes a diagram. The text above accompanies the figure.
Choose an option
Show full solutionCorrect option: B
Correct answer
B(a)-(iv), (b)-(i), (c)-(iii), (d)-(ii)
Step-by-step explanation
In reaction (i), Au (sol) is formed by reduction of
AuCl3, so the chemical method of preparation is
“Reduction”.
In reaction (ii), As2S3 (sol) is formed by double decomposition, so the chemical method of preparation is “Double decomposition”.
In reaction (iii), S (sol) is formed by oxidation of H2S, so the chemical method of preparation is “Oxidation”.
In reaction (iv), Fe(OH)3(sol) is formed by hydrolysis of FeCl3 so the chemical method of preparation is “Hydrolysis”.
In reaction (ii), As2S3 (sol) is formed by double decomposition, so the chemical method of preparation is “Double decomposition”.
In reaction (iii), S (sol) is formed by oxidation of H2S, so the chemical method of preparation is “Oxidation”.
In reaction (iv), Fe(OH)3(sol) is formed by hydrolysis of FeCl3 so the chemical method of preparation is “Hydrolysis”.
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This is a previous-year question from JEE Main 2021, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.