Which of the following does not give oxygen on heating?

$(N H_{4})_{2} C r_{2} O_{7}$

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$K C l O_{3}$

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$Z n (C l O_{3})_{2}$

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$K_{2} C r_{2} O_{7}$

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Solution

The correct option is A
$(N H_{4})_{2} C r_{2} O_{7}$

(NH₄)₂Cr₂O₇(s) ——> Cr₂O₃(s) + N₂(g) + 4H₂O(g)

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Which of the following compounds does not give oxygen on heating ?

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