Is ${K_2}C{r_2}{O_7}$ paramagnetic?

Hint:In order to solve this question first of all we'll pair all the electrons according to the valence bond theory if all the bonds are perfectly paired then we will say these are diamagnetic in nature, similarly if all the bonds are not paired so we will call it as paramagnetic in nature.

Complete step-by-step answer: For solving this question firstly let me tell you that ${K_2}C{r_2}{O_7}$ is Diamagnetic. Through observing the electron structure, the magnetic properties of a material can be determined: if it has unpaired electrons, then the substance is paramagnetic and the substance is diamagnetic if all electrons are coupled.
It is a very bright red-orange, crystalline ionic solid. In comparison to the more industrially important sodium dichromate salt, the salt is common in the laboratory because it is not deliquescent.
Potassium dichromate is a salt of potassium and is the dichromic acid potassium salt. As an oxidising agent, an allergen and a sensitiser, it has a function. It requires a dichromate that is ${2 - }$.

Additional information:
A popular inorganic chemical reagent, potassium dichromate, $K_2Cr_2O_7$, is most widely used as an oxidising agent in various laboratory and industrial applications. It is acutely and chronically toxic to fitness, as with all hexavalent chromium compounds.

Note:While solving these types of questions we should keep in mind that the magnetic properties are determined with the help of valence bond theory so we should keep in mind all the pairing of the electrons can be done correctly with the help of valence bond theory.