# More concentrated solution among the following is- a)1%H3PO4 b)1 m H3PO4 C)1 M H3PO4 d)1 N H3PO4

_{3}PO

_{4}= 98 gmol

^{-1}

1% solution by weight = 1 g H

_{3}PO

_{4}in 99 g of water

Molarity = 1/98*.100 = 0.102 M

1m H

_{3}PO

_{4}= 98 g in 1000 g of water

1M = 98 g in 1000 ml solution

1N = 98/3 g in 1000 ml of water = 32.6 g in 1000 ml solution

1M solution will be more concentrated as it has 98 g in 1000 ml solution whereas 1 molal has 98 g in 1000 g of water. In molar solutions the actual weight of water will be lesser than the molal solutions. Hence molar solutions are more concentrated than molal solutions.

Answer is C.

**
**