જે સમીકરણ સંતુલિત છે અને તે યોગ્ય નિપજો કોને ને રજૂ કરે છે

A \(Li_2O + 2KCl \rightarrow 2LiCl + K_2O\)
B \([ CoCl( NH_3 )_5]^+ +5H^+ \rightarrow Co^{2+} +5NH_4^+ +Cl^-\)
C \([ Mg(H_2O)_6]^{2+} +(EDTA)^{4-} \xrightarrow{{excess\,NaOH}} \) \([Mg(EDTA)]^{2+} +6H_2O\)
D \(CuSO_4 + 4KCN \rightarrow K_2[Cu(CN)_4]+K_2SO_4\)

Verified Solution

Answer & Solution

Correct Answer

(B) \([ CoCl( NH_3 )_5]^+ +5H^+ \rightarrow Co^{2+} +5NH_4^+ +Cl^-\)

Step-by-step Solution

Detailed explanation

Equation \(-1\) is not balanced with respect to charge. Equation \(-2\) gives \(K _3\left[ Cu ( CN )_4\right]\) as product. Equation \(-3\) reaction is unfavourable in the forward direction \(\left( K _2 O\right.\) is unstable, while \(LiO _2\) is stable). Equation \(-4\) is…

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

સૂચિ - \(I\) સાથે સૂચિ - \(II\) ને જોડો, દરેક પ્રક્રિયા દરમિયાન મુક્ત થતા વાયુને જોડો.

સૂચિ - \(I\)	સૂચિ - \(II\)
\((A)\) \(\left( NH _{4}\right)_{2} Cr _{2} O _{7} \stackrel{\Delta}{\longrightarrow}\)	\((I)\) \(H _{2}\)
\((B)\) \(KMnO _{4}+ HCl \rightarrow\)	\((II)\) \(N _{2}\)
\((C)\) \(Al + NaOH + H _{2} O \rightarrow\)	\((III)\) \({ O _{2}}\)
\((D)\) \(NaNO _{3} \stackrel{\Delta}{\longrightarrow}\)	\((IV)\) \({ Cl _{2}}\)

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JEE Mains 2022 Medium

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