3) The movement of pollen molecules in water called Brownian motion is caused by:

A)
air currents in the room.
B)
impact of individual water molecules with the pollen grains.
C)
motion of flagella on the surface of the pollen grains.
D)
convection currents in the water.

 ester of Ethanol and Ethanoic Acid is Ethyl Ethanoate. 

C2H5OH(l)+CH3COOH(l)conc.H2SO4/warm−−−−−−−−−−−→CH3COOCH2CH3(aq)+H2O(l)C2H5OH(l)+CH3COOH(l)→conc.H2SO4/warmCH3COOCH2CH3(aq)+H2O(l)
Condition: Warm con. reactants with conc.Condition: Warm con. reactants with conc.H2SO4H2SO4