Verified Solution • 2025–26 Session moderate

QJEEM14Ch8fff: JEE Main 2014 Chemistry - Class 12 JEEM14Ch8fff Solution: The equation which is balanced and represents the correct…

The equation which is balanced and represents the correct product(s) is :

Multiple Choice Options

  • A [Mg (H2O)6 ]2+ + (EDTA)4- ⟶excessNaOH [Mg (EDTA) ]2+ + 6H2O
  • B CuSO4 + KCN →\to K2 [Cu (CN)4] + K2SO4
  • C Li2O + 2KCl →\to 2LiCl + K2O
  • D [CoCl(NH3)5]+ + 5H+ →\to Co2+ + 5NH4+5NH_4^+ + Cl-

Step-by-Step Verified Solution

(A) [Mg (H2O)6 ]2+ + (EDTA)4- ⟶excessNaOH [Mg (EDTA) ]2+ + 6H2O

The above equation is incorrect because the product formed would be [Mg (EDTA)]2− .

(B) CuSO4 + KCN →\to K2[Cu (CN)4] + K2SO4

The above equation is incorrect. Thus, the correct equation is

2KCN + CuSO4 →\to K2SO4 + Cu + (CN)2(Cyanogen Gas)

(C) Li2O + 2KCl →\to 2LiCl + K2O

The above equation is incorrect because K2O, a stronger base cannot be generated by a weaker base, Li2O.

(D) [CoCl(NH3)5]+ + 5H+ →\to Co2+ + 5NH4+5NH_4^+ + Cl-

The above equation is correct because amine complexes decomposes under acidic medium. Thus, the complex [CoCl(NH3)5] decomposes under acidic conditions to give ammonium ions.

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