Which of the following compound will give metal and oxygen gas at high temperature

Options

A. `NaNO_(3)`
B. `Ag_(2)CO_(3)`
C. `K_(2)CO_(3)`
D. `Li_(2)CO_(3)`

Answer

B

Explanation

(i) `NaNO_(3) overset(Delta)to NaNO_(2)+O_(2)`
(ii) `Ag_(2)CO_(3) overset(Delta)to Ag_(2)O+CO_(2) overset(Delta)to 2Ag +1//2O_(2)`
Silver oxide is less stable due high SRP value
(iii) `K_(2)CO_(3) overset(Delta)to ` No thermal decomposition
(iv) `Li_(2)CO_(3) overset(Delta)to Li_(2)O +CO_(2)`