A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298 K. Further, 18 g of water is then added to the solution and the new vapour pressure becomes 2.9 kPa at 298 K. Calculate: vapour pressure of water at 298 K.

Options

A. `X lt Y lt Z`
B. `X gtY gtZ`
C. `Z gtX =Y`
D. `X gt Y = Z`

Answer

d