problem 1: Identify any five ‘Chemical industries in Oman’. Mention the name and location of the industry and products produced in  these industries. Also, describe the role of a Chemical Engineer in each of these industries. 
 
problem 2: Hydrochloric acid is an important commercial acid. Hydrochloric acid reacts with ammonium hydroxide forming ammonium chloride.

i) prepare the acid base chemical equation for above reaction.

ii) find out the amount HCl required in kilograms to react with 25 kg ammonium hydroxide.

iii) find out the amount of HCl required to obtain 30 kg of ammonium chloride.

problem 3: Sulphuric acid can be made with concentration of 99%. However for different industrial process different concentrations are used. For a specific industrial  requirement, 62% H₂SO₄ is used which has density of 1.55 g/mL. find out the molarity, molality and mole fraction of this H₂SO₄ solution.
 
problem 4: Discuss the importance of a heat exchanger in a chemical process and mention the different types of heat exchangers.

problem 5: Describe the importance of unit operation and unit processes.