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What happens when NaCl is heated with K(...

What happens when NaCl is heated with `K_(2)Cr_(2)O_(7)` and conc. `H_(2)SO_(4)`?

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`Cl_(2)` gas is produced, as shown below:
`6NaCl +K_(2)Cr_(2)O_(7) +7H_(2)SO_(4) to 3Cl_(2)uarr +Cr_(2)(SO_(4))_(3) +3Na_(2)SO_(4)+K_(2)SO_(4)+7H_(2)O`
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