Occurrence of metals

Start Practice

1. 1 2015 AIPMT-I General Principles and Processes of Isolation of Elements
   ''Metals are usually not found as nitrates in their ores''. Out of the following two (a and b) reasons which is/are true for the above observation? (a) Metal nitrates are highly unstable (b) Metal nitrates are highly soluble in water
   A a and b are true B a and b are false C a is false but b is true D a is true but b is false
   Check Answer
2. 2 2012 AIPMT-PRE General Principles and Processes of Isolation of Elements
   Which one of the following is a mineral of iron?
   A Magnetite B Malachite C Cassiterite D Pyrolusite
   Check Answer

Next chapter: Extraction of copper