2022 · Q62
Storage of biological tissues such as blood, organs, semen requires low temperature which is achieved upon the usage of
General KnowledgeChemistry
- ALiquid nitrogen
- BSolid carbon dioxide
- CLiquid air
- DHelium
Explanation
Liquid nitrogen, at -196 degC, provides the ultra-low temperatures needed for cryopreservation of blood, organs and semen. Solid carbon dioxide (-78 degC) is not cold enough, and liquid air and helium are not used for this purpose. Hence liquid nitrogen is used.