Answer to Question #42410 in Inorganic Chemistry for Amer

Question

1) Surface activity is negative for:
a- C3H7OH
b- CH3COOH
c- Na2SO4
d- C2H5OH
e- C6H12O6

2) If the temperature is increased, physical adsorption of substance:
a- increases
b- remains the same
c- decreases
d- at first increases and then decreases
e- at first decreases and then increases

3) Arrange substances with respect to increase of adsorption from aqueous solutions on the activated charcoal:
a- benzene, phenol, glucose
b- phenol, glucose, benzene
c- benzene, glucose, phenol
d- glucose, phenol, benzene
e- phenol, benzene, glucose

4) If the length of hydrocarbon radical in molecule of surface-active substance is increased, describe which of the following statements will be correct:
a- hydrophylic properties become stronger
b- surface tension decreases
c- surface activity reduces
d- hydrophobic properties become weaker
e- adsorption decreases

5) Adsorption equilibrium is characterized by:
a- achievement of maximum adsorption
b- presence of both physical adsorption and chemical adsorption
c- absence of des