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| [[Water (molecule)|Water (hydrogen oxide)]]
| {{chem|H|2|O}}
| Common [[solventகரைப்பான்]], Required by [[Carbon-based life]]
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| [[Nitrous oxide]]
| {{chem|N|2|O}}
| [[Laughing gas]], [[anesthetic]] (used in a combination with [[diatomic oxygen]] to make [[Nitrous oxide and oxygen]] anesthesia), produced by [[Nitrogen-fixingநைதரசன் bacteriaநிலைப்படுத்தல்]], [[Nitrous]], [[oxidizing agentஆக்சிசனேற்றி]] in [[rocketஏவூர்தி]]ry, [[aerosol propellant]], [[recreational drug]], [[greenhouseபைங்குடில் gasவளிமம்]]. Other nitrogen oxides such as {{chem|N|O|2}} ([[Nitrogen dioxide]]), {{chem|N|O}}([[Nitrogenநைதரசன் oxideஆக்சைடு]]), {{chem|N|2|O|3}} ([[Dinitrogen trioxide]]) and {{chem|N|2|O|4}} ([[Dinitrogen tetroxide]]) exist, particularly in areas with notable [[airவளி pollutionமாசடைதல்]]. They are also strong oxidisers, can add [[Nitricநைட்ரிக் acidகாடி]] to [[Acidஅமில rainமழை]], and are harmful to health.
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| [[Silicon dioxide]]
| {{chem|SiO|2}}
| [[Sandமணல்]], [[quartzகுவார்ட்சு]]
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| [[Iron(II,III) oxide]]
| {{chem|Fe|3|O|4}}
| [[Ironஇரும்புத் Oreதாது]], [[Rustதுரு]], along with [[iron(III) oxide]] ({{chem|Fe|2|O|3}})
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| [[Aluminium oxide]]
| {{chem|Al|2|O|3}}
| [[Aluminiumஅலுமினியம்]] [[Oreகனிமூலம்]], [[Alumina]], [[Corundumகுருந்தம்]], [[Rubyமாணிக்கம்]] (Corundum with [[impurities]] of [[Chromiumகுரோமியம்]]).
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| [[Zinc oxide]]
| {{chem|Zn|O}}
| Reqiured for [[vulcanization]] of [[rubberஇயற்கை மீள்மம்]], [[Chemical additive|additive]] to [[concreteபைஞ்சுதை]], [[sunscreen]], [[skinஒப்பனைப் careபொருட்கள்]] lotions, [[antibacterialநுண்ணுயிர் எதிர்ப்பி]] and [[Fungicide|antifungal]] properties, [[food additive]], [[whiteவெள்ளை]] [[pigment]].
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| [[காபனீரொக்சைட்டு]]
| [[Carbon dioxide]]
| {{chem|CO|2}}
| Constituent of the [[atmosphereபுவியின் of Earthவளிமண்டலம்]], the most abundant and important [[greenhouseபைங்குடில் gasவளிமம்]], used by [[plantsதாவரம்]] in [[photosynthesisஒளித்தொகுப்பு]] to make [[sugarsசீனி]], product of biological processes such as [[Breathingமூச்சுவிடல்|respiration]] and chemical reactions such as [[combustionதகனம்]] and [[chemical decomposition]] of [[carbonateகார்பனேட்டு]]s. {{chem|C|O}} or [[Carbon monoxideகார்பனோரொக்சைட்டு]] exists as a product of [[incomplete combustionதகனம்]] and is a highly [[toxicநச்சுத்தன்மை]] [[gasவளிமம்]].
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| [[Calcium oxide]]
| {{chem|Ca|O}}
| [[Quicklime]] (used in [[constructionகட்டுமானம்]] to make [[mortar (masonry)|mortar]] and [[concreteபைஞ்சுதை]]), used in [[Self-heating cans]] due to [[exothermicவெப்பம் reactionவிடு வினை]] with [[waterநீர்]] to produce [[Calcium hydroxide]], possible ingredient in [[Greek fire]] and produces [[limelight]] when heated over 2,400 °[[Celsiusசெல்சியசு]].
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