alleryNormal saline solution used for injection is sodium chloride at:
A0.9 per cent
B9.0 per cent
C0.09 per cent
D90 per cent
Answer & Solution
Correct answer: A. 0.9 per cent
1. The fluid inside a blood cell has a certain osmotic pressure.
2. The saline is matched to it so cells are unharmed.
3. That concentration is 0.9 per cent by mass and volume.
_Source: syllabus Chemistry Part I, Chapter 2, Solutions._
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