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Liquid is used to preserve biological ...

Liquid ________ is used to preserve biological specimens

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**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks for a liquid that is used to preserve biological specimens. This indicates that we need to think about substances that have properties suitable for preservation. 2. **Identifying Suitable Liquids**: Consider various liquids that are commonly used in biological preservation. Some common examples include ethanol, formaldehyde, and liquid nitrogen. 3. **Evaluating Properties**: Among these liquids, we need to evaluate their properties. For example: - Ethanol is often used for preserving specimens but may not be the best for long-term preservation. - Formaldehyde is a common preservative but is toxic and may not be suitable for all specimens. - Liquid nitrogen is known for its extremely low temperature. 4. **Selecting the Best Option**: Liquid nitrogen is used because it has a temperature of approximately -196 degrees Celsius. This low temperature prevents cellular breakdown and preserves the structural integrity of biological specimens. 5. **Final Answer**: Therefore, the liquid that is used to preserve biological specimens is **liquid nitrogen**. ---
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An organic compound having the molecular formula C_(3)H_(6)O can exist in the form of two isomers A and B having different functional groups. The isomer A is a liquified which is used as a solvent form nail polish. The isomer B is also liquified. An aqueous solution of one of the lower homologues of B is used for preserving biological specimens in the laboratory (a) What is compound A? (b) Write the electron dot structure of A (c ) What is compound B? (d) Write the electron dot structure of B. (e) Name the lower homologue of compound B which is used in preserving biological specimens.