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Grade: 9

                        

Which of the following is a decomposition reaction? A A g + ( a q ) + C l − ( a q ) → A g C l ( s ) B C 5 ​ H 1 2 ​ ( l ) + 8 O 2 ​ ( g ) → 5 C O 2 ​ ( g ) + 6 H 2 ​ O ( l ) C N H 3 ​ ( l ) + H 2 ​ O ( l ) ⇋ N H 4 + ​ ( a q ) + O H − ( a q ) D H C 2 ​ H 3 ​ O 2 ​ ( l ) + O H − ( a q ) → H 2 ​ O ( l ) + C 2 ​ H 3 ​ O 2 − ​ ( a q ) E C a C O 3 ​ ( s ) → C a O ( s ) + C a O 2 ​ ( g )

28 days ago

Answers : (1)

Mayank Ranka
askIITians Faculty
214 Points
							
As CaCO3 s decomposed into smaller fragments, CaO and CO2 

 

hence this is decomposition reaction  

Chemical decomposition, analysis or breakdown is the separation of a chemical compound into elements or simpler compounds. It is sometimes defined as the exact opposite of chemical synthesis. 
 
Hence, the correct option is E
28 days ago
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