In $Cr_2O_7^{2-}$,every $Cr$ is linked to

Which of the following is incorrect about $K_{2}Cr_{2}O_{7}$?

Consider the following reactions:
$K_2Cr_2O_7$ $\xrightarrow[-H_2O]{KOH} [A]$ $\xrightarrow[-H_2O]{H_2SO_4} [B] + K_2SO_4$
The products $[A]$ and $[B]$,respectively,are:

How is sodium chromate converted into sodium dichromate in the manufacture of potassium dichromate from chromite ore?

Identify the factor responsible for the colour of transition metal compounds.

Silver halides are used in photography because: