\(^{\pi} C_{2} H_{3} O H\) \(=1 \times 0.500 \times R \times T=0.5 R T\)
\(^{\pi} M g_{3}\left(P O_{4}\right)_{2}\) \(=5 \times 0.100 \times R \times T=0.5 R T\)
\(^{\pi} K B r=2 \times 0.250 \times R \times T=0.5 R T\)
\(^{\pi} N a_{3} P O_{4}=4 \times 0.125 \times R T=0.5 R T\)
since the osmotic pressure of all the given solutions is equal.
Hence all are isotonic solution.
($H _{2} CO _{3}$ નો પ્રથમ વિયોજન અચળાંક =$4.0 \times 10^{-7}$$\log 2=0.3 ;$ હળવા પીણાં ની ઘનતા $=1\, g\, mL ^{-1})$
[આણ્વીય દળ ${Cu}: 63.54\, {u}, {S}: 32\, {u}, {O}: 16 \,{u}, {H}: 1\, {u}]$