How to solve Q1?

QUESTION 1 (20 marks) 1.1 10 ppm of chloroform (CHCI3) is detected in the air inside a laboratory at 25C and 1 atm. Express the concentration of chloroform in mg/m?. (7 marks) 1.2 0.01 Mg of mercury (Hg) is detected in a 1 L of water sample. Express the concentration of mercury in ppb. (3 marks) 1.3 Hazardous wastes containing polycyclic aromatic hydrocarbons (PAHs) require proper treatment prior to disposal. PAHs have been reported with a wide range of toxic properties, including impact on the human immune system after long- term exposure. (a) State ONE toxicity classification of PAHs. (1 mark) (b) Explain THREE limitations of biological methods for the treatment of hazardous wastes containing aromatic compounds. (6 marks) Explain ONE physical method to remove PAHs from industrial wastewater. (3 marks) QUESTION 1 (20 marks) 1.1 10 ppm of chloroform (CHCI3) is detected in the air inside a laboratory at 25C and 1 atm. Express the concentration of chloroform in mg/m?. (7 marks) 1.2 0.01 Mg of mercury (Hg) is detected in a 1 L of water sample. Express the concentration of mercury in ppb. (3 marks) 1.3 Hazardous wastes containing polycyclic aromatic hydrocarbons (PAHs) require proper treatment prior to disposal. PAHs have been reported with a wide range of toxic properties, including impact on the human immune system after long- term exposure. (a) State ONE toxicity classification of PAHs. (1 mark) (b) Explain THREE limitations of biological methods for the treatment of hazardous wastes containing aromatic compounds. (6 marks) Explain ONE physical method to remove PAHs from industrial wastewater