1- Settling velocity of a particle in a fluid depends on: (1) Size (2) Fluid density (3) Particle density (4) Particle shape (5) All of the above

2 - Select the correct statement(s) on density of water

(1) 1 kg/L (2) 1 t/m3 (3) 1000 kg/m3 (4) 1 kg/dm3 (5) All answers are correct

3 - Concentration of oxygen (atomic mass =16) dissolved in water is expressed as 8 ppm. Select the correct answer for the concentration expressed in different units:

(1) 8 g/L (2) 8/16 mmol/L

(3) 0.25 mmol/L (4) 0.5 mmol/L (5) All answers are incorrect