{"id":21633,"date":"2024-04-15T06:08:53","date_gmt":"2024-04-15T06:08:53","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=21633"},"modified":"2024-04-15T06:08:53","modified_gmt":"2024-04-15T06:08:53","slug":"which-of-the-following-was-to-be-discovered-first-in-the-chromospheres-of-the-sun-a-krypton-b-xenon-c-neon-d-helium","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-was-to-be-discovered-first-in-the-chromospheres-of-the-sun-a-krypton-b-xenon-c-neon-d-helium\/","title":{"rendered":"Which of the following was to be discovered first in the chromospheres of the sun? A. Krypton B. Xenon C. Neon D. Helium"},"content":{"rendered":"<p>[amp_mcq option1=&#8221;Krypton&#8221; option2=&#8221;Xenon&#8221; option3=&#8221;Neon&#8221; option4=&#8221;Helium&#8221; correct=&#8221;option3&#8243;]<!--more--><\/p>\n<p>The correct answer is: Helium.<\/p>\n<p>Helium was discovered in the chromosphere of the sun in 1868 by French astronomer Pierre Janssen. He was observing a solar eclipse when he noticed a new line in the spectrum of the sun&#8217;s light. Helium was later found on Earth in 1895 by Scottish chemist William Ramsay.<\/p>\n<p>Krypton, xenon, and neon are all noble gases. They are colorless, odorless, and non-reactive gases. They were all discovered in the late 19th century. Krypton was discovered in 1898 by Scottish chemist William Ramsay and English physicist Morris Travers. Xenon was discovered in 1898 by Ramsay and Travers. Neon was discovered in 1898 by Ramsay and English chemist Frederick Soddy.<\/p>\n<p>Helium is the second most abundant element in the universe, after hydrogen. It is also the second most abundant element in the sun, after hydrogen. Helium is a very important element in the universe. It is used in many different applications, including cryogenics, welding, and rocket fuel.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>[amp_mcq option1=&#8221;Krypton&#8221; option2=&#8221;Xenon&#8221; option3=&#8221;Neon&#8221; option4=&#8221;Helium&#8221; correct=&#8221;option3&#8243;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[692],"tags":[],"class_list":["post-21633","post","type-post","status-publish","format-standard","hentry","category-general-science","no-featured-image-padding"],"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>Which of the following was to be discovered first in the chromospheres of the sun? A. Krypton B. Xenon C. Neon D. 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