In a capsule stain the should penetrate the capsule but the

In a capsule stain, the should penetrate the capsule but the does not. As a result, the bacterial cell is the (color) and the capsule looks (color) and the background is .

Solution

basic stains will penetrate the capsule and the acidic stain will stay in the background

thus when we use nigrosine as an acidic stain the background will remain black in color

and when we use crystal violet as a basic stain the cells will stain in purple color

The capsule will be neutral in charge while the bacterial cell surface will be negatively charged

thus the basic stain will penetrate and the acidic stain will remain diffused in the background