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| 1. |
When iron rusts, its weight |
| Answer» <html><body><p> Increases</p><br/><br/><p>When iron or any other metal oxidizes, <a href="https://interviewquestions.tuteehub.com/tag/oxygen-1144542" style="font-weight:bold;" target="_blank" title="Click to know more about OXYGEN">OXYGEN</a> from the <a href="https://interviewquestions.tuteehub.com/tag/air-852233" style="font-weight:bold;" target="_blank" title="Click to know more about AIR">AIR</a> <a href="https://interviewquestions.tuteehub.com/tag/combines-922862" style="font-weight:bold;" target="_blank" title="Click to know more about COMBINES">COMBINES</a> with the iron to <a href="https://interviewquestions.tuteehub.com/tag/make-546668" style="font-weight:bold;" target="_blank" title="Click to know more about MAKE">MAKE</a> iron oxide or rust. So, weight of the bar increases, due to the increased weight of oxygen which has combined with the iron.</p></body></html> | |