Nigrosin is generally used as a negative stain. This is because it is an acidic dye and easily gives up its hydronium io

[answerhappygod]

Nigrosin is generally used as a negative stain. This is because
it is an acidic dye and easily gives up its hydronium ion to become
negatively charged and the bacterial surface has an overall
negative charge; thus, does not stain the cell. This property
then allows an accurate assessment of cell size.
Group of answer choices
A. True
B. False