{"id":90208,"date":"2025-06-01T10:23:02","date_gmt":"2025-06-01T10:23:02","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90208"},"modified":"2025-06-01T10:23:02","modified_gmt":"2025-06-01T10:23:02","slug":"lowering-the-atmospheric-pressure-on-a-liquid","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/lowering-the-atmospheric-pressure-on-a-liquid\/","title":{"rendered":"Lowering the atmospheric pressure on a liquid"},"content":{"rendered":"

Lowering the atmospheric pressure on a liquid<\/p>\n

[amp_mcq option1=”increases the boiling point of the liquid” option2=”lowers the boiling point of the liquid” option3=”does not affect the boiling point of the liquid” option4=”increases the time required for it to boil” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is B) lowers the boiling point of the liquid.
\n<\/section>\n
\nBoiling point is defined as the temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure. When the atmospheric pressure is lowered, the liquid needs to reach a lower vapor pressure to start boiling. Since vapor pressure increases with temperature, a lower required vapor pressure is achieved at a lower temperature. Therefore, lowering the atmospheric pressure on a liquid lowers its boiling point.
\n<\/section>\n
\nThis principle is why water boils at a lower temperature at high altitudes (where atmospheric pressure is lower) than at sea level. For example, water boils at 100\u00b0C at standard atmospheric pressure (1 atm), but at approximately 93\u00b0C in Denver, Colorado (altitude ~1600m), and even lower on top of Mount Everest. Conversely, increasing the pressure (e.g., in a pressure cooker) increases the boiling point of water, allowing food to cook faster.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Lowering the atmospheric pressure on a liquid [amp_mcq option1=”increases the boiling point of the liquid” option2=”lowers the boiling point of the liquid” option3=”does not affect the boiling point of the liquid” option4=”increases the time required for it to boil” correct=”option2″] This question was previously asked in UPSC CAPF – 2018 Download PDFAttempt Online The correct … <\/p>\n

Detailed SolutionLowering the atmospheric pressure on a liquid<\/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":[1085],"tags":[1114,1130,1128],"class_list":["post-90208","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1114","tag-heat-and-thermodynamics","tag-physics","no-featured-image-padding"],"yoast_head":"\nLowering the atmospheric pressure on a liquid<\/title>\n<meta name=\"description\" content=\"The correct answer is B) lowers the boiling point of the liquid. Boiling point is defined as the temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure. When the atmospheric pressure is lowered, the liquid needs to reach a lower vapor pressure to start boiling. Since vapor pressure increases with temperature, a lower required vapor pressure is achieved at a lower temperature. Therefore, lowering the atmospheric pressure on a liquid lowers its boiling point.\" \/>\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\/lowering-the-atmospheric-pressure-on-a-liquid\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Lowering the atmospheric pressure on a liquid\" \/>\n<meta property=\"og:description\" content=\"The correct answer is B) lowers the boiling point of the liquid. Boiling point is defined as the temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure. When the atmospheric pressure is lowered, the liquid needs to reach a lower vapor pressure to start boiling. Since vapor pressure increases with temperature, a lower required vapor pressure is achieved at a lower temperature. 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Boiling point is defined as the temperature at which the vapor pressure of a liquid equals the surrounding atmospheric pressure. When the atmospheric pressure is lowered, the liquid needs to reach a lower vapor pressure to start boiling. Since vapor pressure increases with temperature, a lower required vapor pressure is achieved at a lower temperature. 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