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- On which factors does removal efficiency of condensation depends?1. What is the limitation of the sublimation laboratory technique? 2. When can sublination be applied as a process of separation?(a) Write TWO (2) functions of XRF in materials characterisation.(b) Appraise the sample preparation for X-ray Diffraction (XRD) Test.(c) Support the idea of solid material can be described as amorphous and crystalline especially in XRD characterization.(d) Compare between X-ray Powder Diffaction (XRD) and X-ray Fluorescence Spectrometry (XRF) in terms of their similarities and differences.
- Some polymeric materials are opaque and some are clear and tranparent. Explain why.5. Explain the determination of molecular weight of polymer samples usingdilute viscosity measurement.Please use phase diagram to explain why micro-segregation and macro-segregation happen during practical solidification.
- 22 - What is the force of attraction between liquid molecules? a) Viscosity B) adhesion NS) cohesion D) Fluidity TO) free surfaceWhich of the following correctly describes the stationary and mobile phases for a reversed-phase HPLC separation? a) polar stationary phase, polar mobile phase b) non-polar stationary phase, non-polar mobile phase c) polar stationary phase, non-polar mobile phase d) non-polar stationary phase, polar mobile phaseHow does a polypropylene face mask become polymeric carbon dots?