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Author Question: Consider the following properties of an element: (i) It is solid at room temperature. (ii) It ... (Read 79 times)

strangeaffliction

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Consider the following properties of an element:
 
  (i) It is solid at room temperature.
   (ii) It easily forms an oxide when exposed to air.
   (iii) When it reacts with water, hydrogen gas evolves.
   (iv) It must be stored submerged in oil.
 
  Which element fits the above description the best?
  A) sulfur
  B) copper
  C) mercury
  D) sodium
  E) magnesium

Question 2

Which one of the following pairs cannot be mixed together to form a buffer solution?
 
  A) HONH2, HONH3Cl
  B) NaCl, HCl
  C) RbOH, HF
  D) KOH, HNO2
  E) H2SO3, KHSO3


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Zebsrer

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