Which one of the following element is present as an impurity in pig iron ?

Which one of the following elements is present as inpurity in pig iron in the largest amount -

Which one of the following elements is present as a major impurity in pig iron ?

Which one of the following elements, when present as an impurity in silicon makes it a p-type semiconductor?

Which one of the following elements, when present as an impurity in silicon makes it a p-type semiconductor?

Which one of the following elements constitures a major impurity in pig iron ?

Which one of the following elements constitutes a major impurity in pig iron ?

Which one of the following elements constitutes a major impurity in pig iron?