Which of the following statements is untrue about oxidation and ...

[FButt]

Which of the following statements is untrue about oxidation and reduction processes?
 
  A) An oxidation can happen without a reduction.
  B) It involves the exchange of electrons.
  C) Often ions are generated or consumed.
  D) Electrons are often involved in oxidation and reduction reactions.
  E) All of the above are true.

Question 2

How might you tell whether or not your toothpaste contained either calcium carbonate, CaC 03, or baking soda, NaHC 03, without looking at the ingredients label?
 
  A) if the toothpaste bubbles when heated
  B) if the toothpaste bubbles when added to ammonia, such as window cleaner
  C) if the toothpaste produces a salt (NaCl) when added to HCl
  D) if the toothpaste bubbles when added to vinegar

[xMRAZ]

Answer to Question 1

Answer: A

Answer to Question 2

Answer: D

[FButt]

Excellent

[juliaf]

Gracias!