GK Questions and Answers for Class 12: Here we are providing questions and answers covering various sections of general knowledge, like science, history, current affairs, etc., which not only help them increase their IQ level but also help them grow
We continue our rare-earth series with praseodymium. It’s sometimes called the green metal because it tarnishes so quickly that if you leave a small block of it on the shelf
Gary Hanington is Professor Emeritus of physical science at Great Basin College and Chief Scientist at AHV. He can be reached at gary.hanington@gbcnv.edu.
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