Question

Human R.B.C.will swell up and burst when placed in the solution of?

• A. $0.7\%(w.v)$
• B. $0.9\%(w.v)$
• C. $1.2\%(w.v)$
• D. $1.3\%(w.v)$

Answer 1

Answer: (A)

$0.7\%(w.v)$

RBCs (Red Blood Corpuscles) will swell if they are placed in a hypotonic solution.

A hypotonic solution (e.g. 0.4% NaCl or distilled water) is any solution that has a lower osmotic pressure than another solution.

Red blood cells placed in a solution with a higher water concentration compared to their contents (eg pure water) will gain water by osmosis, swell up and burst.

0.7%(w.v) is hypotonic in nature. When human R.B.C.will swell up and burst when placed in the solution of 0.7%(w.v).

So the answer is '0.7%(w.v)'.