Which of the following is true concerning redox reactions?
A. Double-replacement reactions are always redox reactions.
B. Single-replacement reactions may be redox reactions.
C. Acid-base reactions are always redox reactions.
D. all of the above

Question

Which of the following is true concerning redox reactions?
  A. Double-replacement reactions are always redox reactions. 	
  B. Single-replacement reactions may be redox reactions. 	
  C. Acid-base reactions are always redox reactions. 	
  D. all of the above

aaronq · Answer

B. Single-replacement reactions may be redox reactions.

aaronq · Answer

You can arrive at this conclusion with examples that negate the statements.

A) $\sf KCl+AgNO_3\rightarrow KNO_3+AgCl $  (not redox)

B)  $\sf HCl + NaOH \rightarrow H_2O + NaCl $   (not redox)