{"id":23498,"date":"2024-04-15T06:34:28","date_gmt":"2024-04-15T06:34:28","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23498"},"modified":"2024-04-15T06:34:28","modified_gmt":"2024-04-15T06:34:28","slug":"when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/","title":{"rendered":"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6aaa0e58cd7ad\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    SO3                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    SO2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    NO2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    N2O                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: <strong>C. NO2<\/strong><\/p>\n<p>When conc. H2SO4 is added to dry KNO3, a vigorous reaction occurs and brown fumes of nitrogen dioxide (NO2) are evolved. The reaction is as follows:<\/p>\n<p>$$KNO_3 + H_2SO_4 \\to KNO_2 + H_2O + NO_2$$<\/p>\n<p>The brown fumes <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> of NO2 are due to the oxidation of nitric oxide (NO) by the sulfuric acid. The nitric oxide is formed as a by-product of the reaction between the potassium nitrate and the sulfuric acid. The sulfuric acid reacts with the potassium nitrate to form potassium sulfate and nitric oxide. The nitric oxide then reacts with the oxygen in the air to form nitrogen dioxide.<\/p>\n<p>The nitrogen dioxide is a poisonous gas that can cause respiratory problems. It is also a major contributor to acid rain.<\/p>\n<p>The other options are incorrect because they are not formed in the reaction between conc. H2SO4 and dry KNO3.<\/p>\n<ul>\n<li>Option A: SO3 is sulfur trioxide. It is <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div> not formed in the reaction between conc. H2SO4 and dry KNO3.<\/li>\n<li>Option B: SO2 is sulfur dioxide. It is not formed in the reaction between conc. H2SO4 and dry KNO3.<\/li>\n<li>Option D: N2O is nitrous oxide. It is not formed in the reaction between conc. H2SO4 and dry KNO3.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O<\/title>\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\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O\" \/>\n<meta property=\"og:description\" content=\"Join Our Telegram Channel Subscribe on YouTube\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T06:34:28+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":"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/","og_locale":"en_US","og_type":"article","og_title":"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O","og_description":"Join Our Telegram Channel Subscribe on YouTube","og_url":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T06:34:28+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/","url":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/","name":"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-04-15T06:34:28+00:00","dateModified":"2024-04-15T06:34:28+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/when-conc-h2so4-is-added-to-dry-kno3-brown-fumes-are-evolved-these-fumes-are-due-to-a-so3-b-so2-c-no2-d-n2o\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"mcq","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/"},{"@type":"ListItem","position":3,"name":"chemistry","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/chemistry\/"},{"@type":"ListItem","position":4,"name":"When conc. H2SO4 is added to dry KNO3, brown fumes are evolved. These fumes are due to A. SO3 B. SO2 C. NO2 D. N2O"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/23498"}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=23498"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/23498\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=23498"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=23498"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=23498"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}