CUET · CHEMISTRY · PYQ PAPER 2023

The IUPAC Name for the complex \(Hg [Co(SCN)_4]\)

A Mercury tetrathiocyanatocobaltate (III)
B Mercury tetrathiocyanatocobaltate (IV)
C Tetracyanocobalt Mercuric (III)
D Tetrathiocyanato cobalt Mercuric (IV)

Verified Solution

Answer & Solution

Correct Answer

(A) Mercury tetrathiocyanatocobaltate (III)

Step-by-step Solution

Detailed explanation

Oxidation state of Co: Let \(x\) be the oxidation state of Co. SCN is \(-1\). For the complex to be named as cobaltate (anion) with Hg as the cation, assume Co has an oxidation state that makes the overall compound neutral with common Hg oxidation states. If Co is \(+3\), the…

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.

Same subject

Explore more questions on app

From CUET

If \(x, y\) and \(z\) are non zero real numbers, the inverse of matrix \(A=\left[\begin{array}{lll}x & 0 & 0 \\ 0 & y & 0 \\ 0 & 0 & z\end{array}\right]\) is:

CUET 2023 Medium

If A and B are two independent events then,
Match List I with List II

List - I	List - II
(A) \(P(A \cup B)\)	(I) \(P\left(A^{\prime}\right) P\left(B^{\prime}\right)\)
(B) P(not A or not B)	(II) \(P(A) ; P(B) \neq 0\)
(C) \(P(A / B)\)	(III) \(1-P\left(A^{\prime}\right) P\left(B^{\prime}\right)\)
(D) P(neither A nor B)	(IV) \(1-P(A) P(B)\)

Choose the correct answer from the options given below:

CUET 2023 Easy

Explore more questions on app

List-I (Name reaction.)	List-II (Reaction)
(A) Williamson ether synthesis	(I)
(B) Hydroboration oxidation	(II)
(C) Reimer-Tiemann reaction	(III)
(D) Friedel Craft Acylation reaction	(IV)