Please I want the solution and the method of solution.

Q1: Choose the correct answer. (9) marks) 1. The condition where roflux and stripping ratio approach to infinity is called as (A) Fecd ratio (B) Optimum ratio (C) Minimum reflux (D) Total reflux 2. If 0.75 is the fraction of liquid in the feed, Estimate the feed line slope. A) -2.0 (B) -1.5 () -3.0 D) Cannot be calculated 3. The process of distillation is ased for the liquids having (A) Sufticient difference in thr boiling point B) Sufficient difference in their melting point C) Sufficient difference in their solubility D) None of the mentioned 4. the pressure of n-heptane and toluene at 373k are 106 and 73.7kN/m2 respectively. What is the mole fraction of n-heptanein the vapor at 373K if the total pressure is 101.3kN/m2. A) 0.856 B) 0.896 (C) 0.728 D) 1.00 5. The addition of a third component to a binary system in a distillation process is usually to break the azeotrope point is called as A) Vacuum distillation B) High-pressure distillation C) fractional distillation (D) Extractive distillation. 6. The suitable mechanism for the distillation process is: A) phase addition (B) Separation by a barrier C) Separation by a hiquid agent D) Separation by solid agents 7. A Mechanical equilibrium of vapor-liquid system means that: A) There is no heat transfer. B) The temperature of the vapor and liquid phases are equal C) The pressure of the vapor and liquid phases are equal D) The compositions of the vapor and liquid phases do not change at a given temperature and pressure. 8. A flash calculations for mulfi-organic components occur when: A) The actual pressure (P) is between the bubble point (PBub) and dew point (PDow) pressures of the feed at the operating temperature. B) P=PBub=P bew