Quiz (Chem 242)

The Solubility of two partially miscible liquids of phenol-water system is depends on two factors :..............&...........

• Temperature & pressure

• Volume & pressure

• Temperature & Concentration of phenol in water

................. is defined as that particular ratio of components in a mixture that has the lowest freezing point.

• Critical point

• Eutectic point

• Boiling point

In phenol-water system, If the %composition of phenol at critical Temperature is 33%

The % composition of water at critical temperature is ...........

• 67%

• 0.33%

• 70%

To convert the molar concentration (mol/L) to unit (g/L) by multiplying in .................

• number of moles (n)

• 10³

• Molecular weight (M.wt)

For Ternary system, we have three components.If the system of only one phase,The degree of freedom F=

• 3

• 4

• 5

The liquids are completely dissolve in each other to form homogeneous solution called .............. liquids.

• Immiscible liquids

• miscible liquids

• partially miscible liquids

The degree of freedom at constant pressure ......................

• F=C-P+2

• F=C-P+3

• F=C-P+1

Plot a graph of % phenol against miscibility temperature.The graph is ...................

• Triangular

• Straight line

• bell-shaped

If Distribution co-efficient smaller than one (D<1),This mean that concentration of substance in aqueous layer ............... than concentration in organic layer.

• smaller

• greater

• equal

In the first order reaction,we determine the rate constant by plotting the relation between ln[A] and " t " and slope should be equal ...........

• K

• -K

• 1/K