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Q. (a) A mixture of ethyne and pure oxygen is used for welding instead of using a mixture of ethyne and air. Why?(b) Why pure acetic acid is called glacial acetic acid?.....????? |
| Answer» <html><body><p><img align="absmiddle" alt="\huge \red {\underline {HAYE\:MATE}}" class="latex-formula" id="TexFormula1" src="https://tex.z-dn.net/?f=%20%5Chuge%20%5Cred%20%7B%5Cunderline%20%7BHAYE%5C%3AMATE%7D%7D%20%20%20" title="\huge \red {\underline {HAYE\:MATE}}"/></p><p></p><p> <img align="absmiddle" alt="\huge \red {\mathbb {ANSWER}}" class="latex-formula" id="TexFormula2" src="https://tex.z-dn.net/?f=%20%5Chuge%20%5Cred%20%7B%5Cmathbb%20%7BANSWER%7D%7D%20%20" title="\huge \red {\mathbb {ANSWER}}"/></p><p></p><p></p><p></p><p></p><p></p><ul><li><em><strong><u>(a) Ethyne</u></strong> is an unsaturated carbon compound. It burns in air with a sooty flame.</em></li></ul><p></p><ul><li><em> It’s an incomplete combustion since the oxygen <a href="https://interviewquestions.tuteehub.com/tag/available-888895" style="font-weight:bold;" target="_blank" title="Click to know more about AVAILABLE">AVAILABLE</a> from air is not enough to burn the carbon completely. </em></li></ul><p></p><ul><li><em>Therefore, for <a href="https://interviewquestions.tuteehub.com/tag/complete-423576" style="font-weight:bold;" target="_blank" title="Click to know more about COMPLETE">COMPLETE</a> combustion pure oxygen is required, which burns Carbon and Hydrogen completely <a href="https://interviewquestions.tuteehub.com/tag/producing-2229964" style="font-weight:bold;" target="_blank" title="Click to know more about PRODUCING">PRODUCING</a> a very hot and clean flame apt for welding.</em></li></ul><p></p><p></p><ul><li><em> It is not possible to generate such a high temperature without pure oxygen.</em></li></ul><p></p><p></p><ul><li><em><strong><u>b) The Freezing point</u></strong> of pure acetic acid is very high. </em></li></ul><p></p><p></p><ul><li><em>l</em><em>t freezes into a solid at a temperature very close to room temperature: 16.5 ºC, or 62 ºF. Hence, during winters it gets <a href="https://interviewquestions.tuteehub.com/tag/frozen-466150" style="font-weight:bold;" target="_blank" title="Click to know more about FROZEN">FROZEN</a> due to cold climate and appears like an ice. </em></li></ul><p></p><ul><li><em>That is why pure acetic acid is called glacial acetic acid.</em></li></ul><p></p><p></p><p></p><p><img align="absmiddle" alt="\huge \blue {\mathbb {THANKS}}" class="latex-formula" id="TexFormula3" src="https://tex.z-dn.net/?f=%20%5Chuge%20%5Cblue%20%7B%5Cmathbb%20%7BTHANKS%7D%7D%20%20" title="\huge \blue {\mathbb {THANKS}}"/></p><p></p><p></p><p></p><p></p><p> </p><p></p><p></p><p> <img align="absmiddle" alt="\huge \green {FOllOW\:ME}" class="latex-formula" id="TexFormula4" src="https://tex.z-dn.net/?f=%20%5Chuge%20%5Cgreen%20%7BFOllOW%5C%3AME%7D%20%20%20%20" title="\huge \green {FOllOW\:ME}"/></p><p></p><p></p><p></p><p><img align="absmiddle" alt="\huge \purple {\mathbb {SINGLE\:STAR}}" class="latex-formula" id="TexFormula5" src="https://tex.z-dn.net/?f=%20%5Chuge%20%5Cpurple%20%7B%5Cmathbb%20%7BSINGLE%5C%3ASTAR%7D%7D%20%20" title="\huge \purple {\mathbb {SINGLE\:STAR}}"/></p></body></html> | |