অৰ্থৱন্তঅৰ্দ্ধ
অৰ্থ’ছিলিছিলিক এছিড (Assamese)
1. Orthosilicic acid () is an inorganic compound with the formula Si(OH)4. Although rarely observed, it is the key compound of silica and silicates and the precursor to other silicic acids [H2xSiOx+2]n. Silicic... from wikipedia.org