Two solutions are termed *isotonic* if they:
AAre equally polar
BHave the same osmotic pressure at a given temperature
CHave the same concentration in g/L
DBoil at the same temperature
Answer & Solution
Correct answer: B. Have the same osmotic pressure at a given temperature
**Isotonic = equal osmotic pressure**. Separated by a semipermeable membrane, no net osmosis. 0.9% saline is isotonic with blood plasma — safe to inject IV.
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