{"id":9851,"date":"2024-07-05T10:16:25","date_gmt":"2024-07-05T09:16:25","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=9851"},"modified":"2024-07-17T11:56:26","modified_gmt":"2024-07-17T10:56:26","slug":"radioactivity-set-1","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2024\/07\/05\/radioactivity-set-1\/","title":{"rendered":"Radioactivity Set -1"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\"><strong>1. \u00a0A radioactive element emits an alpha particle. The mass number of the element , after emission ___________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Remains unchanged<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B.  Increases by one<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Increases by three<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. <strong>Decreases by four<\/strong><\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER:D.Decreases by four <BR>\nSOLUTION : When an alpha particle is emitted from a nucleus, the nucleus loses two protons and two neutrons. This means the mass number decreases by 4 and the atomic number decreases by 2. A new element is formed that is two places lower in the Periodic Table than the original element.<\/p>\n<\/div>egin\n\n\n\n<h2 class=\"wp-block-heading\"><strong>2. The velocity of neutron in a nuclear reactor is retarded by ________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Ordinary water<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B.  <strong>Heavy water<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Mercury<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. Alchohol<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER:B.Heavy water<BR>\nSOLUTION:Heavy water i.e., D2O slows down the speed of neutrons in nuclear reactors.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>3. Gamma &#8211; ray photons have ___________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. \u00a0<strong>No mass and no electric charge<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. \u00a0No mass and an electric charge of +1<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. No mass and an electric charge of +2<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D.  No mass and an electric charge of -1<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER : A.No mass and no electric charge<BR>\nSOLUTION: Gamma-ray photons have the highest energy and shortest wavelength of any electromagnetic radiation (EMR) spectrum:\n <\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4. Natural radioactivity was discovered by _____.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Rutherford<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. <strong>Becquerel<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Curie<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. Schmidt<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: B.Becquerel<BR>\nSOLUTION:Henry Becquerel in 1896 discovered radioactivity proving that the uranium emitted radiation without an external source of energy such as the Sun. Uranium, Polonium is the radioactive element exhibit in nature.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>5. \u00a0A particle which is similar to electron is __________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Positron<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. <strong>Beta particle<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Photon<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. Mason<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: B.Beta particle<BR>\nSOLUTION: The beta particle is similar to an electron because they have the same mass and charge. However, beta particles can have either a negative charge (negatrons) or a positive charge (positrons) and originate from the nucleus of an atom.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>6. \u00a0In Alpha Decay _____________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Z and A are unchanged<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. Z decreases by 4 and A decreases by 2<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. <strong>Z decreases by 2 and A decrease by 4<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. Z decreases by 4 and A decreases by 4<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: C.Z decreases by 2 and A decrease by 4<BR>\nSOLUTION: In alpha decay, the nucleus emits an alpha particle or a helium nucleus. Alpha decay occurs in massive nuclei that have a large proton to neutron ratio. Alpha radiation minimizes the protons to neutrons ratio in the parent nucleus, thereby bringing it to a more stable configuration.\n\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>7. A device used for the measurement of radioactivity is __________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A.  Mass spectrometer<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. Cyclotron<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Nuclear reactor<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. <strong>G. M. counter<\/strong><\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: D. G. M. counter<BR>\nSOLUTION :\nThe radioactivity is measured by the Geiger \u2013Muller counter (G.M. Counter). The GM counter is used to detect the radioactive emission, most commonly for gamma and beta particles.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>8. \u00a0 Hydrogen bomb is based on the principle of __________<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. Nuclear fission<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. <strong>Nuclear fusion<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. Natural radioactivity<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. Artificial radioactivity<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: B.Nuclear fusion<BR>\nSOLUTION:A hydrogen bomb is based on the principle of uncontrollable nuclear fusion. Nuclear fusion is the process where the nuclei of two light atoms combine to form a new nucleus.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>9. Phenomena of radioactivity was discovered by Henri Becquerel in ______________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. <strong>1896<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. 1895<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. 1894<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. 1893<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER:A.1896<BR>\nSOLUTION:The phenomenon of radioactivity was discovered by Henry Becquerel in 1896.\n<\/p>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>10. \u00a0Elements undergo radioactive decay when proton number becomes greater than _____________.<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. 50<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>B. 40<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>C. <strong>82<\/strong><\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>D. 73<\/strong><\/h3>\n\n\n\n<button class=\"acc\">ANSWER &#038; SOLUTION<\/button>\n<div class=\"pnl\">\n  <p>ANSWER: C.82<BR>\nSOLUTION:\n82\n<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>1. \u00a0A radioactive element emits an alpha particle. The mass number of the element , after emission ___________. A. Remains unchanged B. Increases by one C. Increases by three D. Decreases by four ANSWER &#038; SOLUTION ANSWER:D.Decreases by four SOLUTION : When an alpha particle is emitted from a nucleus, the nucleus loses two protons<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9,19],"tags":[5174,5172,5651,5653,5177,5646,5170,5175,5173,4029,5649,5652,5171,5176,5169],"class_list":{"0":"post-9851","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-chemistry","7":"category-science","8":"tag-a-device-used-for-the-measurement-of-radioactivity-is-__________","9":"tag-a-particle-which-is-similar-to-electron-is-__________","10":"tag-chemistry-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","11":"tag-chemistry-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-examsin-kannada","12":"tag-elements-undergo-radioactive-decay-when-proton-number-becomes-greater-than-_____________","13":"tag-exam-veda","14":"tag-gamma-ray-photons-have-___________","15":"tag-hydrogen-bomb-is-based-on-the-principle-of-__________","16":"tag-in-alpha-decay-_____________","17":"tag-mcqs-adda","18":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","19":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-examsin-kannada","20":"tag-natural-radioactivity-was-discovered-by-_____","21":"tag-phenomena-of-radioactivity-was-discovered-by-henri-becquerel-in-______________","22":"tag-the-velocity-of-neutron-in-a-nuclear-reactor-is-retarded-by-________"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/9851","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=9851"}],"version-history":[{"count":2,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/9851\/revisions"}],"predecessor-version":[{"id":9871,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/9851\/revisions\/9871"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=9851"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=9851"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=9851"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}