Answer:
The dots were not properly located and arrows are not used in Lewis structures
Explanation:
If we intend to write a Lewis structure for a compound, that lewis structure must consist of only dots. These dots actually show the valence electrons on the outermost shell of the molecule.
We do not involve arrows when writing dot electron structures for compounds. The valence electrons of magnesium ought not to be written together because they are not a lone pair, rather they are two unpaired electrons. The use of an arrow suggests a coordinate covalent bond which is not the case here.
The correct lewis structure for MgCl2 is shown in the image attached to this answer.
Answer: Le Chatleir Principle
Explanation: The answer of this question can be easily explanied through the Le Chatleir Principle which states that In order to maintain the equilibrium of the reaction, the stress applied to that particular direction will move the equilibrium to the opposite direction in which the stress has been applied.
The given reaction is -

If the amount of the oxygen is reduced to half and is being doubled, then the reaction will move in froward direction that is a rightward shift. Same situation will arise in option c and d.
If the amount of nitrogen monoxide is reduced to half or being doubled, the reaction will move towards backward direction that is a leftward reaction.
Answer:
1. H+ + OH- <--------> H2O
H+ is a Lewis acid
OH- is a Lewis base
2. Cl- + BCl3 <---------> BCl4-
Cl- is a Lewis base
BCl3 is a Lewis acid
3. K+ + 6H2O <------> K(H2O)6+
K+ is a Lewis acid
H2O is a Lewis base
Explanation:
By definition, Lewis acid is an electron pair acceptor while a Lewis base is an electron pair donor.
Potassium ion accept electron pairs from 6 water molecules which donate the electron pairs.