NEET 2015 Physics and Chemistry Cancelled Paper

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Question : 5 of 90
 
Marks: +1, -0
"Metals are usually not found as nitrates in their ores".
Out of the following two (a and b) reasons whichis/are true for the above observation ?
(a) Metal nitrates are highly unstable.
(b) Metal nitrates are highly soluble in water
[NEET 2015 C]
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