{"id":86931,"date":"2025-06-01T04:23:46","date_gmt":"2025-06-01T04:23:46","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86931"},"modified":"2025-06-01T04:23:46","modified_gmt":"2025-06-01T04:23:46","slug":"the-most-significant-variable-gases-in-the-atmosphere-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-most-significant-variable-gases-in-the-atmosphere-are\/","title":{"rendered":"The most significant ‘variable gases’ in the atmosphere are"},"content":{"rendered":"

The most significant ‘variable gases’ in the atmosphere are<\/p>\n

[amp_mcq option1=”oxygen and carbon dioxide” option2=”carbon dioxide and nitrogen” option3=”water vapour and carbon dioxide” option4=”water vapour and oxygen” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC Geoscientist – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nVariable gases in the atmosphere are those whose concentrations change significantly over time and space. Water vapour (H2O) is the most variable gas, with concentrations varying widely depending on temperature, location, and weather conditions. Carbon dioxide (CO2) is also a variable gas, with seasonal cycles and significant long-term increase due to human activities. Both are major greenhouse gases.
\n<\/section>\n
\n– Nitrogen (N2) and oxygen (O2) are the most abundant gases but are considered permanent or fixed gases because their global concentrations are relatively constant (around 78% N2 and 21% O2).
\n– Variable gases like water vapour, carbon dioxide, methane, and ozone exist in much smaller concentrations but play crucial roles in atmospheric processes, particularly climate and weather.
\n<\/section>\n
\nWater vapour is the most potent greenhouse gas, although its concentration is highly variable. Carbon dioxide is a less potent greenhouse gas molecule-for-molecule than some others (like methane) but its higher concentration and long atmospheric lifetime make it a primary driver of current climate change.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The most significant ‘variable gases’ in the atmosphere are [amp_mcq option1=”oxygen and carbon dioxide” option2=”carbon dioxide and nitrogen” option3=”water vapour and carbon dioxide” option4=”water vapour and oxygen” correct=”option3″] This question was previously asked in UPSC Geoscientist – 2022 Download PDFAttempt Online Variable gases in the atmosphere are those whose concentrations change significantly over time and … <\/p>\n

Detailed SolutionThe most significant ‘variable gases’ in the atmosphere are<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1091],"tags":[1108,1107,1106],"class_list":["post-86931","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1108","tag-the-atmosphere","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nThe most significant 'variable gases' in the atmosphere are<\/title>\n<meta name=\"description\" content=\"Variable gases in the atmosphere are those whose concentrations change significantly over time and space. Water vapour (H2O) is the most variable gas, with concentrations varying widely depending on temperature, location, and weather conditions. Carbon dioxide (CO2) is also a variable gas, with seasonal cycles and significant long-term increase due to human activities. Both are major greenhouse gases. - Nitrogen (N2) and oxygen (O2) are the most abundant gases but are considered permanent or fixed gases because their global concentrations are relatively constant (around 78% N2 and 21% O2). - Variable gases like water vapour, carbon dioxide, methane, and ozone exist in much smaller concentrations but play crucial roles in atmospheric processes, particularly climate and weather.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/the-most-significant-variable-gases-in-the-atmosphere-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The most significant 'variable gases' in the atmosphere are\" \/>\n<meta property=\"og:description\" content=\"Variable gases in the atmosphere are those whose concentrations change significantly over time and space. Water vapour (H2O) is the most variable gas, with concentrations varying widely depending on temperature, location, and weather conditions. Carbon dioxide (CO2) is also a variable gas, with seasonal cycles and significant long-term increase due to human activities. Both are major greenhouse gases. - Nitrogen (N2) and oxygen (O2) are the most abundant gases but are considered permanent or fixed gases because their global concentrations are relatively constant (around 78% N2 and 21% O2). - Variable gases like water vapour, carbon dioxide, methane, and ozone exist in much smaller concentrations but play crucial roles in atmospheric processes, particularly climate and weather.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-most-significant-variable-gases-in-the-atmosphere-are\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T04:23:46+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"The most significant 'variable gases' in the atmosphere are","description":"Variable gases in the atmosphere are those whose concentrations change significantly over time and space. 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