Which of the following most readily undergoes an E2 reaction with sodium ethoxide (NaOCH2CH3)?A) (CH3)CF. B) (CH3)CCl.
C) (CH3)CBr.
D) (CH3)CI.

(CH3)CI

Explanation:

As we move down the group, the halogen atoms become more easily polarizable and the C-X bond is more easily broken.

Recall that E2 mechanism has to do with synchronous proton abstraction and loss of the halogen.

These occur faster with (CH3)CI than when the C-X bond involves other halogens.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.

it takes on an electronical energy