Which is a condition in which an element substitution could ...

[LaDunn]

Which is a condition in which an element substitution could occur?
 
  A) an ion is much larger than the one it will replace
  B) an ion has a +4 charge, and it will replace an ion with a +3 charge
  C) an ion has an equal charge to the one it will replace
  D) an ion is much smaller than the one it ill replace

Question 2

Separating lead, copper, zinc, and iron from the sulfur atoms produces sulfuric acid as a by-product. Why is this a problem?
 
  A) Sulfuric acid is useless and yields no profit.
  B) Sulfuric acid, when released into the atmosphere, combines with vapor to produce acid rain.
  C) Sulfuric acid is extremely profitable, but not in the form it is produced through this process.
  D) Lead, copper, zinc and iron are wasted in producing sulfuric acid, which is more profitable.

[nital]

Answer to Question 1

Answer: C

Answer to Question 2

Answer: B