Which of the following elements is most reactive :

Options :
  1. Alluminium
  2. Chromium
  3. Potassium
  4. Calcium

Answer and Explanation :-

Answer: Option 4


Calcium is a slivery white metal.The surface of the calcium metal is covered with a thin layer of oxide that helps protect the metal from attack by air.

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Which of the following cell organelles is absent in animal cells :

Next Question : Blood is a which type of tissue :

Click here for free online test on General Science


 (Getemail alerts when others member replies)

Having an eye for beauty isn't the same thing as a weakness...except possibly when it comes to you.
-Suzanne Collins