1.

Which of the following soled salt on heating with solid K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) orange red vapours are evolved which turn aquous NaOH solution yellow?

Answer»

`NaBr`
`NaCl`
`NaNO_(3)`
`NAI`

Solution :`NaCl_((s))+K_(2)Cr_(2)O_(7)_((s))+H_(2)SO_(4)(few drops) overset("Non-redox")underset("reaction")(to) underset("Orange RED vapours")(CrO_(2)Cl_(2)(uarr)) +HO`
`CrO_(2)Cl_(2)+OH^(-)(aq.) to underset("Yellow solution")(CrO_(4)^(2-))(aq.)+CL^(-)+2H_(2)O`


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