The number of possible isomers of molecular C5H12 is ________. ...

[WWatsford]

The number of possible isomers of molecular C5H12 is ________.
 
  A) 2
  B) 3
  C) 4
  D) 5

Question 2

Which of the following reactions is not an oxidation-reduction reaction?
 
  A) 2 Na + H2O  2 NaOH + H2
  B) Mg + 2 HCl  MgCl2 + H2
  C) CH4 + 2 O2  CO2 + 2 H2O
  D) CaO + CO2  CaCO3

Question 3

Rain with which of the following pH of values would be considered to be acid rain?
 
  A) 9.5
  B) 9.0
  C) 7
  D) 1.5

[Tonyam972]

Answer to Question 1

B

Answer to Question 2

D

Answer to Question 3

D