ANS:B - 20-30

the misunderstanding, but talc is actually an extremely soft mineral. Therefore, its Brinell Hardness Number (BHN) is significantly lower than 20-30. In fact, talc is one of the softest minerals known, with a Mohs hardness of 1. This means that talc is easily scratched by harder substances and can be scratched by a fingernail. Consequently, its Brinell Hardness Number (BHN) is typically in the range of 1-5, reflecting its very low hardness.