Which of the following is an example of a chemical (as opposed to physical) chan

Question

Which of the following is an example of a chemical (as opposed to physical) change?

methane combusting to produce carbon dioxide and water vapor

liquid water freezing to ice

liquid isopropyl alcohol evaporating to gaseous form

chlorine gas condensing to liquid form

solid mercury melting to liquid form

methane combusting to produce carbon dioxide and water vapor

liquid water freezing to ice

liquid isopropyl alcohol evaporating to gaseous form

chlorine gas condensing to liquid form

solid mercury melting to liquid form

Explanation / Answer

for remaining all other options there will be a change in terms of their physical staes such as liquid tpo gas or gas to vapour or solid to gas

but in first option change takes place as

CH4 ------------> Co2 + H2O

thus it is a chamicla change

answer is option `1

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