Read the passage given below and answer the following questions :
Raoult's law states that for a solution of volatile liquids, the partial vapour pressure of each component of the solution is directly proportional to its mole fraction present in solution. Dalton's law of partial pressure states that the total pressure `P_("total")` over the solution phase in the container will be the sum of the partial pressures of the components of the solution and is given as:
`P_("total")`= `P_1`+ `P_2`

What type of deviation from Raoult's law does the above graph represent ?

Options

A. First positive then negative
B. Negative deviation
C. Positive deviation
D. First negative then positive

Answer

B

Explanation

Negative deviation