CUET · CHEMISTRY · PYQ PAPER 2023

Arrange the following electrolytes in the increasing order of van't Hoff factor (i) for complete dissociation of solute.
(A) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
(B) \(MgCl _2\)
(C) \(K _4\left[ Fe ( CN )_6\right]\)
(D) KCl
Choose the correct answer from the options given below:

A (A), (B), (C), (D)
B (D), (B), (A), (C)
C (D), (A), (B), (C)
D (C), (A), (B), (D)

Verified Solution

Answer & Solution

Correct Answer

(B) (D), (B), (A), (C)

Step-by-step Solution

Detailed explanation

(A) \(\left[ Co \left( NH _3\right)_6\right] Cl _3 \rightarrow \left[ Co \left( NH _3\right)_6\right]^{3+} + 3Cl^-\): \(i_A = 1+3 = 4\) (B) \(MgCl _2 \rightarrow Mg^{2+} + 2Cl^-\): \(i_B = 1+2 = 3\) (C)…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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Arrange the following electrolytes in the increasing order of van't Hoff factor (i) for complete dissociation of solute.(A) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)(B) \(MgCl _2\)(C) \(K _4\left[ Fe ( CN )_6\right]\)(D) KClChoose the correct answer from the options given below:

Step-by-step Solution

Arrange the following electrolytes in the increasing order of van't Hoff factor (i) for complete dissociation of solute.
(A) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
(B) \(MgCl _2\)
(C) \(K _4\left[ Fe ( CN )_6\right]\)
(D) KCl
Choose the correct answer from the options given below: