CUET · CHEMISTRY · PYQ PAPER 2023
Answer the question on the basis of passage given below:
Adsorption is the phenomenon of attracting and retaining the molecules of a substance on the surface of a solid resulting into a higher concentration on the surface than in the bulk. The substance adsorbed is known as adsorbate and the substance on which adsorption takes place is called adsorbent. In physisorption adsorbate is held to the adsorbent by weak van der Waals forces and in chemisorption by strong chemical bond.
In coagulation of a positive sol, the flocculating power will be in the order:
A. \(PO _4^{3-}\)
B. \(Cl ^{-}\)
C. \([ Fe ( CN )]^{3-}\)
D. \(SO _4^{2-}\)
Choose the correct answer from the options given below:
- A \(C>A>D>B\)
- B \(C>A>B>D\)
- C \(C>D>B>A\)
- D \(B>D>A>C\)
Answer & Solution
Correct Answer
(A) \(C>A>D>B\)
Step-by-step Solution
Detailed explanation
Valence of \(PO _4^{3-}\) is -3. Valence of \(Cl ^{-}\\) is -1. Valence of \([ Fe ( CN )]^{3-}\\) is -3. Valence of \(SO _4^{2-}\\) is -2. According to Hardy-Schulze rule, greater the valence of the flocculating ion, greater is its flocculating power. Order of flocculating…
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