#6 B b/c O is partially negatively charged, H partially posi

来源: 无言无语无声 于 2024-09-08 12:58:55 [] [旧帖] [给我悄悄话] 阅读数 : (407 bytes)
回答: 紫檀生物大拿们，请教 由 truetruegarfield 于 2024-09-08 12:07:36

Positively charged in O-H, C-H, C-O, O-Hcovalent bonds. 
#3 B b/c cohesion is the attraction between molecules. E.g. via hudrogen bond like in #6. Adhesion describe cells. Due to hydrogen bond, water molecules are "sticky" on molecular level. So it has high surface tension. It's why it transpires in plants, why it moves up in xylem in plants. Due to its cohesive nature.

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