Question

"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 ? [2015]
(i) Metal nitrates are highly unstable.
(ii) Metal nitrates are highly soluble in water.
(a) (i) and (ii) are false
(b) (i) is false but (ii) is true
(c) (i) is true but (ii) is false
(d) (i) and (ii) are true

Answer 1

Answer:

"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 ? [2015]

(i) Metal nitrates are highly unstable.

(ii) Metal nitrates are highly soluble in water.

(a) (i) and (ii) are false

(b) (i) is false but (ii) is true

(c) (i) is true but (ii) is false

(d) (i) and (ii) are true

Answer 2

Out of the following two ((i) and (ii)) reasons, true for the above observation is/are :

• Observation : "Metals are usually not found as nitrates in their ores".

• Reason (i) : Metal nitrates are highly unstable.

• Reason (ii) : Metal nitrates are highly soluble in water.

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

• Metal nitrates are generally not found in ores because they have high water solubility and could be washed out easily by rainwater.

• Potassium nitrate and sodium nitrate are examples of stable metal nitrates. Hence, we can conclude that metal nitrates are also stable.