Which of the following is false? charged molecules are insoluble in water. hydrophobic molecules tend to be nonpolar and hydrophilic molecules tend to be polar. gasoline has partial positive and negative charges which allows it to dissolve in water. nh3 dissolves in water because its molecules form hydrogen bonds with water. hydrophobic molecules prefer to interact with each other in an aqueous solution.

Number 1 is false

Explanation:

1.- Charged molecules are insoluble in water. The statement is false, charged molecules are soluble in water and this is the main characteristic of charged molecules.

2.- Hydrophobic molecules tend to be nonpolar and hydrophilic molecules tend to be polar. This is true, hydrophobic molecules are non polar and hydrophilic molecules are polar.

3.- Gasoline has partial positive and negative charges which allows it to dissolve in water. This is true, gasoline is soluble in water.

4.- NH3 dissolves in water because its molecules form hydrogen bonds with water. This is true, NH3 interact with water because they can form hydrogen bonds.

5.- Hydrophobic molecules prefer to interact with each other in an aqueous solution. Absolutely true, hydrophobic molecules interact among them and they isolate from the environment.

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current