Which method is used for the purification of bauxite containing excess silica as an impurity?

ایک ناپاک کے طور پر زیادہ سلیکا پر مشتمل باکسائٹ کی تطہیر کے لئے کون سا طریقہ استعمال کیا جاتا ہے؟

Baeyer’s method

Hall’s method

Serpeck’s method

None of these

Baeyer's method is used for the purification of bauxite with excess silica.

It involves treating bauxite with sodium hydroxide.

It dissolves the alumina, leaving the silica behind.