Potassium Dichromate & Permanganate: JEE Questions & Solutions

On heating a mixture of common salt and K₂Cr₂O₇ in equal amount along with concentrated H₂SO₄ in a test tube, a gas is evolved. Formula of…

Consider the following statements about manganate and permanganate ions. Identify the correct statements. A. The geometry of both manganate…

Consider the following reactions: K₂Cr₂O₇ + 2 KOH → heat [A] [A] + H₂SO₄ → [B] + K₂SO₄ The products [A] and [B], respectively are:

Preparation of potassium permanganate from MnO₂ involves two-step process in which the 1^st step is a reaction with KOH and KNO₃ to produce:

The molar mass of the water insoluble product formed from the fusion of chromite ore FeCr₂O₄ with Na₂CO₃ in presence of O₂ is..... g mol⁻¹.

Consider the following reactions A + NaCl (little amount) + H₂SO₄ → CrO₂Cl₂ + Side Products CrO₂Cl_2(vapour) + NaOH → B + NaCl + H₂O B + H⁺…

NaCl reacts with conc. H₂SO₄ and K₂Cr₂O₇ to give reddish fumes (B), which react with NaOH to give yellow solution (C). (B) and (C)…

KMnO₄ decomposes on heating at 513 K to form O₂ along with:

Alkaline oxidative fusion of MnO₂ gives “A” which on electrolytic oxidation in alkaline solution produces B. A and B respectively are:

A and B formed in the following reactions are: CrO₂Cl₂ + 4NaOH → A + 2NaCl + 2H₂O A + 2HCl + 2H₂O₂ → B + 3H₂O

Identify correct statements from below: A. The chromate ion is square planar. B. Dichromates are generally prepared from chromates. C. The…

K₂Cr₂O₇ paper acidified with dilute H₂SO₄ turns green when exposed to:

KMnO4 oxidises I⁻ in acidic and neutral/faintly alkaline solution, respectively to:

When Cu²⁺ ion is treated with KI, a white precipitate, X appears in solution. The solution is titrated with sodium thiosulphate, the…

Element not present in Nessler’s reagent is: