{"id":150,"date":"2020-09-16T09:19:39","date_gmt":"2020-09-16T04:19:39","guid":{"rendered":"https:\/\/talib.pk\/test-preparation\/?p=150"},"modified":"2020-09-16T09:19:39","modified_gmt":"2020-09-16T04:19:39","slug":"1st-year-chemistry-atomic-structure-mcqs","status":"publish","type":"post","link":"https:\/\/talib.pk\/test-preparation\/1st-year-chemistry-atomic-structure-mcqs\/","title":{"rendered":"1st Year Chemistry Atomic Structure MCQs"},"content":{"rendered":"<div class=\"28d95f43054b69d67289d6316e9506d8\" data-index=\"1\" style=\"float: none; margin:12px 0 12px 0; text-align:center;\">\n<script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<!-- talib-new -->\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block\"\r\n     data-ad-client=\"ca-pub-3438155045791616\"\r\n     data-ad-slot=\"6774242552\"\r\n     data-ad-format=\"auto\"><\/ins>\r\n<script>\r\n(adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>If you are searching for 1st Year Chemistry Atomic Structure MCQs, then this is the place to get them. An atom consists of electrons, protons, and neutrons. These were revealed by different scientists. Electrons are the negative charged particles, Protons are the positively charged and neutrons are the neutrally charged particles. They all have different stories of discovery and have different and specific properties. Measurement of e\/m value and charge on an electron is done in different ways. In order to explain an atom, different scientists made different theories. Different spectra were studied. There are some rays called x-rays were produced from electrons. An atomic model was rejected which was made by Bohr. Later the concept of Quantum numbers was made for the atoms which were thought to be successful. Different scientists worked on some rules to make this atomic model perfect. So, have a look at the important MCQs of this chapter to prepare for the Entry test.<\/p>\n<h2 style=\"text-align: center;\">1st Year Chemistry Atomic Structure MCQs<\/h2>\n<p><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-400 aligncenter\" src=\"https:\/\/talib.pk\/test-preparation\/wp-content\/uploads\/2020\/09\/Chemistry-4.jpg\" alt=\"1st Year Chemistry Atomic Structure MCQs\" width=\"300\" height=\"300\" srcset=\"https:\/\/talib.pk\/test-preparation\/wp-content\/uploads\/2020\/09\/Chemistry-4.jpg 300w, https:\/\/talib.pk\/test-preparation\/wp-content\/uploads\/2020\/09\/Chemistry-4-150x150.jpg 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<h3><strong>KEY POINTS<\/strong><\/h3>\n<div class=\"box info  alignleft\" style=\"width:100%\"><div class=\"box-inner-block\"><i class=\"fa tie-shortcode-boxicon\"><\/i>\n\t\t\t\n<div class=\"lightbulb tie-list-shortcode\">\n<ul>\n<li>Discovery of Electrons<\/li>\n<li>Properties of Cathodes<\/li>\n<li>Discovery of protons and their properties<\/li>\n<li>Discovery of Neutrons and their properties<\/li>\n<li>Measurement of e\/m value and Measurement of Charge on electron<\/li>\n<li>Rutherford&#8217;s atomic model<\/li>\n<li>Planck&#8217;s Quantum Theory<\/li>\n<li>Bohr&#8217;s Atomic Model\/Defects<\/li>\n<li>Spectrum<\/li>\n<li>X-Rays and Atomic number<\/li>\n<li>Wave-Particle Nature of Matter<\/li>\n<li>Heisenberg&#8217;s Uncertainty principle<\/li>\n<li>Quantum Numbers<\/li>\n<li>Electronic Distribution<\/li>\n<\/ul>\n<\/div>\n\t\t\t<\/div><\/div>\n<p>&nbsp;<\/p>\n<p><strong><span style=\"color: #ff6600;\">Question#1<\/span>. Isotopes differ in:<\/strong><\/p>\n<ul>\n<li>Properties with respect to their mass number<\/li>\n<li>Properties with respect to their proton number<\/li>\n<li>Isotopes don\u2019t differ as they have same number of electrons and protons<\/li>\n<li>All of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Properties with respect to their mass number<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#2<\/span>. Isotopes are:<\/strong><\/p>\n<ul>\n<li>Chemically similar<\/li>\n<li>Physically dissimilar<\/li>\n<li>Chemically dissimilar<\/li>\n<li>Both a and b<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Both a and b<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#3<\/span>. Ionization energy depends upon:<\/strong><\/p>\n<ul>\n<li>Atomic\/ionic radii<\/li>\n<li>Proton to electron ratio<\/li>\n<li>Shielding effect<\/li>\n<li>All of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>All of the above<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#4<\/span>. 2<sup>nd<\/sup> ionization energy of Mg is higher than the first because:<\/strong><\/p>\n<ul>\n<li>Metallic character of Mg<sup>+1<\/sup> is less than that of Mg<\/li>\n<li>Nuclear pull for Mg<sup>+1<\/sup>electron is more than that for the Mg atom<\/li>\n<li>Size of Mg<sup>+1<\/sup> is greater than Mg<sup>+2<\/sup><\/li>\n<li>Both a and b<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Nuclear pull for Mg<sup>+1<\/sup>electron is more than that for the Mg atom<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#5<\/span>. With the increasing atomic number, ionization energy increases along a period because:<\/strong><\/p>\n<ul>\n<li>No change in shielding effect along a period<\/li>\n<li>Nuclear pull increases with the increase in the number of protons<\/li>\n<li>Atomic\/ionic size decreases along a period<\/li>\n<li>All of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>All of the above<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#6<\/span>. The correct set of four quantum numbers for the valence electron of rubidium (Z = 37) is:<\/strong><\/p>\n<ul>\n<li>n = 5, 1 = 0, m = 0 and s = +1\/2<\/li>\n<li>n = 5, 1 = 1, m = 1 and s = +1\/2<\/li>\n<li>n = 5, 1 = 1, m = 0 and s = +1\/2<\/li>\n<li>n = 6, 1 = 0, m = 0 and s = +1\/2<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>n = 5, 1 = 0, m = 0 and s = +1\/2<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#7<\/span>. The electron configuration of K(19) is:<\/strong><\/p>\n<ul>\n<li>1s<sup>3<\/sup> 2s<sup>3<\/sup> 2p<sup>5<\/sup> 3s<sup>3<\/sup> 3p<sup>5<\/sup><\/li>\n<li>1s<sup>2<\/sup> 2s<sup>2<\/sup> 2p<sup>6<\/sup> 3s<sup>2<\/sup> 2p<sup>5<\/sup> 4s<sup>2<\/sup><\/li>\n<li>1s<sup>2<\/sup> 2s<sup>2<\/sup> 2p<sup>6<\/sup> 3s<sup>2<\/sup> 3p<sup>6<\/sup> 4s<sup>1<\/sup><\/li>\n<li>None of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>1s<sup>2<\/sup> 2s<sup>2<\/sup> 2p<sup>6<\/sup> 3s<sup>2<\/sup> 3p<sup>6<\/sup> 4s<sup>1<\/sup><\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#8<\/span>. The number of d-electrons in Fe<sup>+2<\/sup> (Z=26) is not equal to:<\/strong><\/p>\n<ul>\n<li>p electrons in Ne (Z = 10)<\/li>\n<li>d electrons in Fe (Z = 26)<\/li>\n<li>s electrons in Mg (Z = 12)<\/li>\n<li>p electrons in Ar (Z = 17)<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>s electrons in Mg (Z = 12)<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#9<\/span>. The electronic configuration of an element is 1s<sup>2<\/sup> 2s<sup>2<\/sup> 2p<sup>3<\/sup>. This represents a\/an:<\/strong><\/p>\n<ul>\n<li>Ground state<\/li>\n<li>Hybridized state<\/li>\n<li>Excited-state<\/li>\n<li>Molecular state<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Ground state<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#10<\/span>. In which of the following, all have the same number of electrons:<\/strong><\/p>\n<ul>\n<li>Cl<sup>&#8211;<\/sup>, Br<sup>&#8211;<\/sup> and I<sup>&#8211;<\/sup><\/li>\n<li>H<sup>&#8211;<\/sup>, H and H<sup>+<\/sup><\/li>\n<li>F<sup>&#8211;<\/sup>, Ne and Na<sup>+<\/sup><\/li>\n<li>Li<sup>+<\/sup>, Na<sup>+ <\/sup>and K<sup>+<\/sup><\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>F<sup>&#8211;<\/sup>, Ne and Na<sup>+<\/sup><\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#11<\/span>. Identify the correct order of increasing energy:<\/strong><\/p>\n<ul>\n<li>1s &lt; 2s &lt; 3s<\/li>\n<li>2s &gt; 3s &gt; 1s<\/li>\n<li>1s &gt; 2s &gt; 3s<\/li>\n<li>None of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>1s &lt; 2s &lt; 3s<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#12<\/span>. The shapes of s orbitals is circular and their size:<\/strong><\/p>\n<ul>\n<li>Increase with the increase in principal quantum number<\/li>\n<li>Decrease with the increase in principal quantum number<\/li>\n<li>Remains the same with the change in principal quantum number<\/li>\n<li>None of the above<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Increase with the increase in principal quantum number<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#13<\/span>. The place between the two orbitals is called:<\/strong><\/p>\n<ul>\n<li>Free zone<\/li>\n<li>Nodal surface<\/li>\n<li>Neutral zone<\/li>\n<li>Resonance area<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Nodal surface<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#14<\/span>. Shapes of p orbitals:<\/strong><\/p>\n<ul>\n<li>Circular<\/li>\n<li>Dumb-bell<\/li>\n<li>Elliptical<\/li>\n<li>Complex<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Dumb-bell<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#15<\/span>. The correct number of degenerate orbitals:<\/strong><\/p>\n<ul>\n<li>s = 2, p = 6, d = 10, f = 14<\/li>\n<li>s = 3, p = 1, d = 5, f = 7<\/li>\n<li>s = 1, p = 3, d = 5, f = 7<\/li>\n<li>s = 1, p = 3, d = 7, f = 5<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>s = 1, p = 3, d = 5, f = 7<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#16<\/span>. The ion that is iso-electronic with CI atom is:<\/strong><\/p>\n<ul>\n<li>CN<sup>&#8211;<\/sup><\/li>\n<li>O<sup>+<\/sup><sub>2<\/sub><\/li>\n<li>N<sup>+<\/sup><sub>2<\/sub><\/li>\n<li>O<sup>&#8211;<\/sup><sub>2<\/sub><\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>O<sup>&#8211;<\/sup><sub>2<\/sub><\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#17<\/span>. Which of the following particles would on losing an electron has its outermost p-orbital as half-filled?<\/strong><\/p>\n<ul>\n<li>Nitrogen atom<\/li>\n<li>O<sup>+<\/sup> ion<\/li>\n<li>P<sup>-1<\/sup> ion<\/li>\n<li>S<sup>+1<\/sup> ion<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>P<sup>-1<\/sup> ion<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#18<\/span>. The ionic specie having more electrons than neutrons is:<\/strong><\/p>\n<ul>\n<li>Mg<sup>+2<\/sup><\/li>\n<li>O<sup>2<\/sup><sup>&#8211;<\/sup><\/li>\n<li>Na<sup>+<\/sup><\/li>\n<li>F<sup>-1<\/sup><\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>O<\/strong><sup>2<\/sup><strong><sup>&#8211;<\/sup><\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#19<\/span>. Which pair of electrons of elements will have the same chemical properties?<\/strong><\/p>\n<ul>\n<li>2, 24<\/li>\n<li>2, 4<\/li>\n<li>13, 22<\/li>\n<li>3, 11<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>3, 11<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#20<\/span>. An orbital which is spherically symmetrical is:<\/strong><\/p>\n<ul>\n<li>p-orbital<\/li>\n<li>s-orbital<\/li>\n<li>d-orbital<\/li>\n<li>f-orbital<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>s-orbital<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#21<\/span>. The value of e\/m for the electron is:<\/strong><\/p>\n<ul>\n<li>1.7588 x 10<sup>11<\/sup> kg C<sup>-1<\/sup><\/li>\n<li>1.7588 x 10<sup>-11<\/sup> Ckg<sup>-1<\/sup><\/li>\n<li>1.7588 x 10<sup>11 <\/sup>kg C<sup>-1<\/sup><\/li>\n<li>1.7588 x 10<sup>11<\/sup> Ckg<sup>-1<\/sup><\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>1.7588 x 10<sup>11<\/sup> Ckg<sup>-1<\/sup><\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#22<\/span>. A nodal plane in an orbital is the plane where the electron density is:<\/strong><\/p>\n<ul>\n<li>Maximum<\/li>\n<li>-ve<\/li>\n<li>Zero<\/li>\n<li>+ve<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Zero<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#23<\/span>. How many times the mass of neutrons is greater than the mass of an electron?<\/strong><\/p>\n<ul>\n<li>1480<\/li>\n<li>2000<\/li>\n<li>1840<\/li>\n<li>1200<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>1840<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#24<\/span>. The mass of an oxygen atom is:<\/strong><\/p>\n<ul>\n<li>2.657 x 10<sup>-23<\/sup>g<\/li>\n<li>2.657 x 10<sup>23<\/sup><\/li>\n<li>16g<\/li>\n<li>32g<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>2.657 x 10<sup>-23<\/sup>g<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#25<\/span>. The mass of a neutron is:<\/strong><\/p>\n<ul>\n<li>Same as that of proton<\/li>\n<li>A little bit smaller than that of proton<\/li>\n<li>Slightly more than that of proton<\/li>\n<li>Slightly less than that of proton<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Slightly more than that of proton<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#26<\/span>. The smallest charge of electricity which has been measured on any particle is:<\/strong><\/p>\n<ul>\n<li>Charge on the positive ray of He gas<\/li>\n<li>Charge on particles<\/li>\n<li>Charge on any droplet in Millikan Experiment<\/li>\n<li>Charge on an electron<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Charge on an electron<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#27<\/span>. Which of the following has highest ionization energy value?<\/strong><\/p>\n<ul>\n<li>Li<\/li>\n<li>Be<\/li>\n<li>H<\/li>\n<li>He<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>He<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#28<\/span>. Greater shielding effect corresponds to ionization energy value:<\/strong><\/p>\n<ul>\n<li>Greater<\/li>\n<li>Lesser<strong><br \/>\n<\/strong><\/li>\n<li>Remain the same<\/li>\n<li>No effect<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Lesser<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#29<\/span>. The mass of a proton is:<\/strong><\/p>\n<ul>\n<li>9.1 x 10<sup>-10<\/sup> g<\/li>\n<li>9.1 x 10<sup>-18<\/sup> g<\/li>\n<li>1.672 x 10<sup>-27<\/sup> kg<\/li>\n<li>9.1 x 10<sup>-31<\/sup> kg<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>1.672 x 10<sup>-27<\/sup> kg<\/strong>\n\t\t\t<\/div><\/div>\n<p><strong><span style=\"color: #ff6600;\">Question#30<\/span>. Which group shows the abnormal behavior in trend of ionization energy in periods?<\/strong><\/p>\n<ul>\n<li>Group I-A<\/li>\n<li>Group III-A<\/li>\n<li>Group-VI-A<\/li>\n<li>Both b and c<\/li>\n<\/ul>\n<div class=\"clear\"><\/div><div class=\"toggle close\"><h3 class=\"toggle-head-open\">Answer<i class=\"fa fa-angle-up\"><\/i><\/h3><h3 class=\"toggle-head-close\">Answer<i class=\"fa fa-angle-down\"><\/i><\/h3><div class=\"toggle-content\">\n\t\t\t<strong>Group III-A<\/strong>\n\t\t\t<\/div><\/div>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>If you are searching for 1st Year Chemistry Atomic Structure MCQs, then this is the place to get them. An atom consists of electrons, protons, and neutrons. These were revealed by different scientists. Electrons are the negative charged particles, Protons are the positively charged and neutrons are the neutrally charged particles. They all have different &hellip;<\/p>\n","protected":false},"author":2,"featured_media":400,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/posts\/150"}],"collection":[{"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/comments?post=150"}],"version-history":[{"count":0,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/posts\/150\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/media\/400"}],"wp:attachment":[{"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/media?parent=150"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/categories?post=150"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/talib.pk\/test-preparation\/wp-json\/wp\/v2\/tags?post=150"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}