The element Radium is obtained generally from which of the following minerals?

Options :
  1. Limestone
  2. Haematite
  3. Pitchblende
  4. Rutile
Answer and Explanation :-

Answer: Option 3

Explanation:

Radium is a chemical element with symbol Ra and atomic number 88. Radium is an almost pure-white alkaline earth metal, but it readily oxidizes on exposure to air, becoming black in colour. All isotopes of Radium are highly radioactive. Pitchblende is a massive variety of the mineral Uraninite. Uraninite is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2, but also contains UO3 and oxides of lead, thorium, and rare earth elements. One ton of Pitchblende typically yields about one seventh of a gram of Radium.

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

Previous Question : For getting a better rear view in vehicles what type of mirror is normally used?

Next Question : Which of the following organs produce sound in birds?

Click here for online test on General Science

Responses


 (Getemail alerts when others member replies)







Remind thyself, in the darkest moments, that every failure is only a step toward success, every detection of what is false directs you toward what is true, every trial exhausts some tempting form of error, and every adversity will only hide, for a time, your path to peace and fulfillment.
-Og Mandino