When `K_(2)Cr_(2)O_(7)` is heated with conc. `H_(2)SO_(4)` and soluble chloride such as KCl :

When K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) in the presence of a soluble metal chloride, orange red vapours are produced. These are due to :

When a mixture of solid NaCl, solid K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) orange red vapours are obtained. These are of the compound

A mixture of NaCl and K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) ,deep red vapours and formed .Which of the following statements is false?

A solid mixture of AgCl ad K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) and produces:

A solid mixture of AgCl ad K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) and produces:

A mixture of K_(2)Cr_(2)O_(7) and conc. H_(2)SO_(4) forms

When mixture of NaCl and K_(2)Cr_(2)O_(7) is gently warmed with conc. H_(2)SO_(4) then compound X is formed. What is the oxidation state of central atom of X?