NUMS MDCAT PAPER 2019

1. Two moles of O2 (g) is used to heat one mole of Q (s) to produce 1 mole of a gaseous compound in a small closed furnace. What is the ratio of final pressure at 616 K to the initial pressure at 308 K? assume all reactants are converted to products

2. Name this skeletal structure:

3. What is the % relative humidity at 25ºC and 0.01876 atm if the vapor pressure of water is 23.76 mm Hg

4. Classify this alkyl halide:

5. What is the color of the precipitate when Brady’s reagent is used to test a benzaldehyde

6. Which of the following alcohols can be reduced to aldehyde

7. Which of the following has the highest ionization energy

8. A chemical engineer wants to use the Haber process in order to produce ammonia as raw material for fertilizers. Which of the following parameters must the chemical engineer avoid in order to obtain maximum yield of ammonia

9. Increasing number of CFC production for industrial use has been a major contributor for the depletion of ozone molecules in the stratosphere. When CFC diffuses slowly to the atmosphere in the presence of UV light between 175nm to 220 nm, ozone layer decomposes. If there is 1 mole of CFCl3 (Freon-110 has been released to the air, how many moles of oxygen is produced from the photodecomposition of ozone

10. What is formed by a series of complex reactions of ozone with water in the troposphere that are driven by sunlight