Science Quiz - 3

1. Which of the following metals can be found in a pure state in nature?
   a) Lithium
   b) Iron
   c) Gold
   d) Aluminum
2. In refrigerators, the liquid used as refrigerant is
   A. super-cooled water
   B. liquid ammonia
   C. liquid nitrogen
   D. liquid carbon dioxide

Answers

1. (c) Gold

2. (b) liquid ammonia