अभिक्रिया \(\left[ PtCl _{4}\right]^{2-}+ H _{2} O \rightleftharpoons\left[ Pt\, \left( H _{2} O \right) Cl _{3}\right]^{-}+ Cl ^{-}\) के लिए अभिक्रिया की दर विभिन्न स्पीशीज की सान्द्रता के फलन के अनुसार मापी गई। यह देखा गया कि \(\frac{- d \left[\left[ PtCl _{4}\right]^{2-}\right]}{ dt }=4.8 \times 10^{-5}\left[\left[ PtCl _{4}\right]^{2-}\right]-2.4\) जहाँ वर्ग ब्रेकेट का उपयोग मोलर सान्द्रता बताने के लिए किया गया है। साम्य स्थिरांक \(K _{ c }=\) .........(निकटतम पूर्णाक में)

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.