All of the following reactions are examples of the lewis definition of acid-base behavior except
a. ni + 4 co → ni(co)4
b. ag+ + 2 nh3 → [ag(nh3)2]+
c. bf3 + nh3 → h3nbf3
d. cl- + alcl3 → alcl4-
e. zn + 2 h+ → zn2+ + h2

e . Zn + 2 H+ → Zn2 + H2

Explanation:

Reaction Zn + 2H+ ⇒ Zn2+ + H2 is not the example of lewis definition of acid base behavior.

Explanation:

In the Lewis theory of acid-base reactions, bases donate pairs of electrons and acids accept pairs of electrons.

A Lewis acid is therefore any substance, such as the H+ ion, that can accept a pair of nonbonding electrons. A Lewis base is any substance, such as the OH- ion, that can donate a pair of nonbonding electrons.

Therefore,

a) In  Ni + 4 CO → Ni(CO)4

 Nickel act as lewis acid (Transition metals such as titanium, iron and nickel may have up to eighteen electrons and can frequently accept electron pairs from Lewis bases) and CO act as lewis base because it has lone pair.

b) In Ag+ + 2 NH3 → [Ag(NH3)2]+

Ammonia act as lewis base due to presence of lone pair and Ag+ act as   lewis acid due to deficiency of electron

c) In BF3 + NH3 → H3NBF3

BF3 act as lewis acid due to deficiency of electron  and Ammonia act as lewis base due to presence of lone pair.

d ) In Cl- + AlCl3 → AlCl4-

AlCl3 act as lewis acid due to deficiency of electron  and Cl- act as lewis base due to excess of electron.

e) In Zn + 2 H+ → Zn2+ + H2

H+ is lewis acid but Zn cannot act as lewis base.

false

because it does not have the potential to be entirely used up

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.