What happens when $K_{2} C r_{2} O_{7}$ is heated strongly?

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Solution

When potassium dichromate $(K_{2} {C r}_{2} O_{7})$ heated strongly, it decomposes with the evolution of oxygen.
$4 K_{2} {C r}_{2} O_{7} Δ - \to 4 K_{2} C r O_{4} + 2 {C r}_{2} O_{3} + 3 O_{2}$

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What happens when zinc nitrate is strongly heated?

(a) What happens when copper sulphate crystals are heated strongly? Explain with help of an equation.

(b) What happens when a few drops of water are added to anhydrous copper sulphate? Explain with the help of an equation.

B F_{3}

S O_{2}

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

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