Yuav ua li cas ntxuav lub quartz raj siv nyob rau hauv lub tub rauv?

1. Nws tuaj yeem ntxuav nrog hydrofluoric acid.

2. Siv fuming nitric acid los yog kub concentrated sulfuric acid los ntxuav los yog tsau rau 3 mus rau 5 feeb. Yog tias tsim nyog lossis rov ua dua ob peb zaug, nws tuaj yeem ntxuav.

3. Kub kub kub, chav cua tshuab.