Which of the following is an iron ore ?
1). Bauxite
2). Magnetite
3). Lignite
4). Nitrite
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1. The compounds formed when hydrogen combines with p-block elements are called
2. The chemical(s) most commonly used for cloud seeding or artificial rainmaking is are
3. Question 3.29:Write the general outer electronic configuration of s-, p-, d- and f- block elements.
4. The Fungus which is used in the alcohol industry is .
7. Which among the following will be a negative ion?
8. An example of major air pollutant is
9. The charcoal used to decolourise brown sugar solution is
10. Which one of the following minerals is found in Mona2ite sand