Total vapour pressure of mixture of 1 mole of volaile components A (`P_(a^(%)`)=100 mm Hg) and 3 mole of volatile component B(`P_B^(@) =80 mm Hg`) is 90 mm Hg. For such case:

Options

A. there is a negative deviation from Raoult's law
B. there is a positive deviation from Raoult's law
C. there is no deviation from Raoults law
D. can not be decided

Answer

a