MHT CET · Chemistry · Coordination Compounds

What is the oxidation number of $\mathrm{Pt}$ in $\mathrm{PtCl}_6^{2-}$ ?

A 6
B 4
C -6
D -4

Verified Solution

Answer & Solution

Correct Answer

(B) 4

Step-by-step Solution

Detailed explanation

$\mathrm{PtCl}_6^{2-}:$
$x+(-1 \times 6)=-2$
$\therefore x=+4$

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

Which among the following has lowest boiling point?

MHT CET 2025 Easy
What is the value of $\Delta \mathrm{H}-\Delta \mathrm{U}$ for the following reaction? $2 \mathrm{C}_{(\mathrm{s})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow \mathrm{C}_2 \mathrm{H}_{6(\mathrm{~g})}$

MHT CET 2023 Easy
What is the value of percent atom economy when an organic compound of formula weight $75 \mathrm{u}$ is obtained from reactants having sum formula weight $225 \mathrm{u}$ ?

MHT CET 2023 Medium
What is the mass of potassium chloride produced when $12.25 \mathrm{~g}$ potassium chlorate undergo decomposition? (At mass: $\mathrm{K}=39$, $\mathrm{Cl}=35.5, \mathrm{O}=16)$

MHT CET 2021 Medium
The correct representation of Nernst’s equation for half- cell reaction $C u^{2 +} (a q) + e^{-} \to C u^{+} (a q)$ is

MHT CET 2019 Hard
What is the value of $\Delta \mathrm{H}^{\circ}$ for the formation of ethanol from ethene gas and liquid water from following data?
(i) $\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}_{(1)}+3 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}+3 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})}$ $\Delta \mathrm{H}^{\circ}=-1368 \mathrm{~kJ}$
(ii) $\mathrm{C}_{2} \mathrm{H}_{4(\mathrm{~g})}+3 \mathrm{O}_{2(\mathrm{~g})} \longrightarrow 2 \mathrm{CO}_{2(\mathrm{~g})}+2 \mathrm{H}_{2} \mathrm{O}_{(\mathrm{l})}$ $\Delta \mathrm{H}^{\circ}=1410 \mathrm{~kJ}$

MHT CET 2020 Medium

Explore more questions on app

From MHT CET

Let ' $n$ ' is the number of liquid drops, each with surface energy ' $E$ '. These drops join to form single drop. In this process

MHT CET 2024 Medium
Two sources of light $0.6 \mathrm{~mm}$ apart and screen is placed at a distance of $1.2 \mathrm{~m}$ from them. A light of wavelength $6000 Å$ used. Then the phase difference between the two light waves interfering on the screen at a point at a distance $3 \mathrm{~mm}$ from central bright band is

MHT CET 2023 Medium
${\int l o g x . [\log (e x)]}^{- 2} d x = \dots$

MHT CET 2019 Medium
Osmotic pressure of one molar solution at $27^{\circ} \mathrm{C}$ is $(\mathrm{R}=0.082)$

MHT CET 2020 Easy
Identify alkadiene molecule from following.

MHT CET 2024 Medium
What is the density of water in $\mathrm{kg} \mathrm{dm}^{-3}$ if it's density in $\mathrm{g}^{\mathrm{cm}^{-3}}$ is 0.863 ?

MHT CET 2022 Medium

Explore more questions on app

What is the oxidation number of \(\mathrm{Pt}\) in \(\mathrm{PtCl}_6^{2-}\) ?

Answer & Solution

Step-by-step Solution

See the Complete Solution