Silica gel is belongs to ___ adsorbent.
A: non-polar
B: polar
C: semi-chemical
D: alkaline
E: chemical
A: non-polar
B: polar
C: semi-chemical
D: alkaline
E: chemical
举一反三
- Which of the following silica gel as adsorbent in TLC, contains neither inorganic adhesive material(gypsum ustum) nor fluorescence indicator? A: Silica gel H B: Silica gel G C: Silica gel GF254 D: None of above
- Modern communications satellites use a variety of orbits, including ( ). A: geostationary orbits B: Molniya orbits C: elliptical orbits D: low (Polar and non-polar) earth orbits
- silica gel A: 硅胶 B: % C: @
- You must insert …….bags inside cartons. A: carbon B: gel C: silica gel
- By saying "Spring is usually prime food time for 1,200 polar bears" ( Line 1, Para. 1 ), the author means that ______. A: spring is usually a good time for polar bears to carry out their mating rituals B: the polar bears usually eat a lot in the spring C: spring is generally a good time to hunt polar bears D: polar bears usually hibernate in the spring