A) \[C{{O}^{2-}}_{3}+HCl\xrightarrow{\Delta }\]
B) \[CaO+C\xrightarrow{\Delta }\]
C) \[C+Excess{{O}_{2}}\xrightarrow{\Delta }\]
D) \[HC{{O}^{-}}_{3}+HCl\xrightarrow{\Delta }\]
Correct Answer: B
Solution :
[b] (X) is \[C{{O}_{2}}\] because \[C{{O}_{2}}+N{{H}_{3}}\] under pressure gives urea, reaction (2) does not produce \[C{{O}_{2}}\] \[CaO+3C\xrightarrow{\Delta }Ca{{C}_{2}}+CO\]
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