332 QUESTIONS AND ANSWERS CLS

1)fill in the blank

a)… Osmolality…….  it is the number of moles of particles (solute) per kilogram of water (solvent).

b) Fluorescent compounds have two characteristic spectra....... excitation  spectrum.......and........... an emission spectrum.................................

c) nephlometer ........  measure the intensity of a scattered ligh

2) True & False Questions                                                                      

a) Freezing Point Osmometers measure freezing point depression.    (    T   )

b)Osmolality is depend on the shape, size or weight of the particles. (   F    )

C) glycerol ethanol solution helps to inhibit the growth of microcrystal of barium sulphate .                  (  F      )

 

1

3) What are the measurement that depend on colligative properties?          

1- Freezing point.

2- Vapor pressure.

3- Osmotic pressure.

4- Boiling point.

4) defined the osmotic pressure?

—  Osmotic pressure is the pressure that must be applied on the high concentration side to stop osmosis.