Q. 1 kg of NaOH solution contains 4 g of NaOH. The approximate concentration of the solution is
A) About 0.1 N
B) Decinormal
C) 0.1 molal
D) 0.1 molar
Explanation
(c)
Molecular mass of NaOH = 23+17=40
Hence, molality (m)=$\frac{4}{40 \times \ 0.996}$=0.1
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.