Cationic surfactants are not good detergents but are used mainly ...

[deesands]

Cationic surfactants are not good detergents but are used mainly for their ________ action.
 
  A) cleaning
  B) menthol
  C) germicidal
  D) darkening

Question 2

Burning one mole of propane according to the following reaction: C3H8(g) + 5 O2(g)  3 CO2 + 4 H2O liberates 526 kcal of energy. If all of the coefficients are tripled, how much energy will be released?
 
  A) 526 kcal
  B) 1052 kcal
  C) 1578 kcal
  D) 175.3 kcal

Question 3

The greatest hazard in using plastics in home building materials and furnishings is that some
 
  A) poison children who eat them.
  B) cause cancer.
  C) are slippery.
  D) form poisonous gases when burned.

[Joy Chen]

Answer to Question 1

C

Answer to Question 2

C

Answer to Question 3

D