Q. Solutions A, B, C and D are respectively 0.1 M glucose, 0.05 M NaCl, 0.05 M $BaCl_{2}$ and 0.1 M$\ AlCl_{3}$. Which one of the following pairs is isotonic?
A) A and B
B) B and C
C) A and D
D) A and C
Explanation
(a)
Isotonic solutions have same molar concentration of solute particles in solution. Molar concentration of particles in solution are 0.1 M in glucose, 2$\times$0.05 M in NaCl, 3$\times$0.05 in$\ BasCl_{2}$ and 4$\times$0.1 in $AlCl_{3}.$ Therefore, 0.1 M glucose and 0.05 in M NaCl solutions are isotonic.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.