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Metals are usually not found as nitrates in their ores. Out of the following two (i) and (ii) reasons which is/are true for the above observation? (i) Metal nitrates are highly unstable. (ii) Metal nitrates are highly soluble in water.

1. (a) (i) and (ii) are false
2. (b) (i) is false but (ii) is true
3. (c) (i) is true but (ii) is false
4. (d) (i) and (ii) are true

Correct answer: (b) (i) is false but (ii) is true

Solution

Metal nitrates are highly soluble in water, which prevents their accumulation in ores. However, they are not necessarily unstable, making (ii) true and (i) false.

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