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Which of the following pairs can be dist...

Which of the following pairs can be distinguished by action of heat?
i. `K_(2)CO_(3)` and `CaCO_(3)`
ii. `Na_(2)CO_(3)` and `Mg(NO_(3))_(2)`
iii. `Mg(NO_(3))_(2)` and `NaNO_(2)`

A

i and ii

B

i and iii

C

i, ii, iii

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
i. `Na_(2)CO_(3)K_(2)CO_(3)overset(Delta)rarr"no reaction"`
`CaCO_(3)overset(Delta)rarrCaO+CO_(2)`
iii. `Mg(NO_(3))_(2)overset(Delta)rarrMgO+NO_(2)+1/2O_(2)`
`NaNO_(3)overset(Delta)rarrNaNO_(2)+1/2O_(2)`
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