Chemistry - Salt Analysis Question with Solution | TestHub

(A) Na₃PO₄ on heating does not produce pyrophosphate; it forms metaphosphate (NaPO₃) → Incorrect

(B) In the cobalt nitrate charcoal cavity test, Al³⁺ gives a blue color, not a green bead → Incorrect

(C) The brown ring test for NO₃⁻ requires conc. H₂SO₄, not dilute H₂SO₄ → Incorrect

(D) Chlorine water is not used in the layer test for F⁻ ion → Incorrect

Correct Answer: (A), (B), (C), (D)