jee.json

{
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"results": [
{
"_id": "Chemistry",
"questions": [
{
"question_id": "m9dor4ex",
"chapter": "periodic-table-and-periodicity",
"chapterGroup": "inorganic-chemistry",
"country": "in",
"difficulty": "easy",
"exam": "jee-main",
"examGroup": "jee",
"isBonus": false,
"isOutOfSyllabus": false,
"languages": [
"en",
"hi"
],
"marks": 4,
"negMarks": 1,
"paperId": "jee-main-2025-online-8th-april-evening-shift",
"paperTitle": "JEE Main 2025 (Online) 8th April Evening Shift",
"permalink": "pthe-atomic-number-of-the-element-from-the-following-with-jee-main-chemistry-r0e10n6lhfmosbxm",
"question": {
"en": {
"comprehension": null,
"direction": null,
"content": "<p>The atomic number of the element from the following with lowest 1<sup>st</sup> ionisation enthalpy is :</p>",
"options": [
{
"identifier": "A",
"content": "<p>32</p>"
},
{
"identifier": "B",
"content": "<p>35</p>"
},
{
"identifier": "C",
"content": "<p>19</p>"
},
{
"identifier": "D",
"content": "<p>87</p>"
}
],
"correct_options": [
"D"
],
"answer": null,
"explanation": "<p>To determine which element has the lowest first ionization enthalpy among the given options, we look at the atomic numbers:</p> <p><p>Atomic number 32 corresponds to Germanium (Ge).</p></p> <p><p>Atomic number 35 corresponds to Bromine (Br).</p></p> <p><p>Atomic number 87 corresponds to Francium (Fr).</p></p> <p><p>Atomic number 19 corresponds to Potassium (K).</p></p> <p>The element with the lowest first ionization energy is Francium (Fr) with atomic number 87. This can be represented by its electron configuration: $\text{Fr} - [\text{Rn}] 7s^1$. Francium, being a part of the alkali metal group, has the most loosely bound outer electron compared to the other elements listed, resulting in a lower first ionization enthalpy.</p>"
},
"hi": {
"direction": null,
"comprehension": null,
"content": "निम्नतम प्रथम आयनन एन्थेल्पी वाले तत्व की निम्नलिखित में से परमाणु संख्या है :",
"options": [
{
"identifier": "A",
"content": "32"
},
{
"identifier": "B",
"content": "35"
},
{
"identifier": "C",
"content": "19"
},
{
"identifier": "D",
"content": "87"
}
],
"correct_options": [
"D"
],
"answer": null,
"explanation": "<p>यहाँ सबसे कम प्रथम आयनन ऊर्जा का अर्थ है उस तत्व से सबसे कम ऊर्जा में बाहरी इलेक्ट्रॉन हटाना। इस बात को समझने के लिए निम्नलिखित बिंदुओं पर गौर करें:</p> <p><p>समूह 1 (क्षारीय धातुएँ) के तत्वों में जैसे कि लिथियम, सोडियम, पोटाशियम, रबिडियम, सीज़ियम और फ्रांसियम, आयनन ऊर्जा क्रमशः घटती जाती है क्योंकि बाहरी ऑर्बिटल दूर स्थित होता है और प्रभावी परमाणु आवेश कम होता है।</p></p> <p><p>आपके विकल्पों में:</p></p> <p><p>परमाणु संख्या 19: पोटाशियम (K), जो कि समूह 1 का सदस्य है।</p></p> <p><p>परमाणु संख्या 87: फ्रांसियम (Fr), जो कि समूह 1 में सबसे नीचे है और अपेक्षाकृत सबसे कम प्रथम आयनन ऊर्जा वाला तत्व माना जाता है।</p></p> <p><p>अन्य विकल्प (परमाणु संख्या 32 और 35) अद्रव्यमानिक तत्व हैं जिनकी आयनन ऊर्जा अपेक्षाकृत अधिक होती है।</p></p> <p>जबकि पोटाशियम की आयनन ऊर्जा कम होती है, समूह में सबसे कम आयनन ऊर्जा वाली तत्व फ्रांसियम होती है।</p> <p>अतः निम्नतम प्रथम आयनन ऊर्जा वाला तत्व परमाणु संख्या 87 (फ्रांसियम) है।</p> <p>$$\textbf{उत्तर: विकल्प D (87)}$$</p>"
}
},
"section": [
"chapter",
"paper"
],
"subject": "chemistry",
"timeAllotted": 144000,
"topic": "ionization-energy",
"type": "mcq",
"year": 2025,
"bookmark": {
"en": {
"title": "JEE Main 2025 (Online) 8th April Evening Shift",
"subTitle": "Periodic Table and Periodicity • Chemistry",
"excerpt": "The atomic number of the element from the following with lowest 1st ionisation enthalpy is :"
},
"hi": {
"title": "JEE Main 2025 (Online) 8th April Evening Shift",
"subTitle": "Periodic Table and Periodicity • Chemistry",
"excerpt": "निम्नतम प्रथम आयनन एन्थेल्पी वाले तत्व की निम्नलिखित में से परमाणु संख्या है :"
}
},
"yearKey": "jee-main-2025-online-8th-april-evening-shift"
},
{
"question_id": "m9dot5xh",
"chapter": "coordination-compounds",
"chapterGroup": "inorganic-chemistry",
"country": "in",
"difficulty": "medium",
"exam": "jee-main",
"examGroup": "jee",
"isBonus": false,
"isOutOfSyllabus": false,
"languages": [
"en",
"hi"
],
"marks": 4,
"negMarks": 1,
"paperId": "jee-main-2025-online-8th-april-evening-shift",
"paperTitle": "JEE Main 2025 (Online) 8th April Evening Shift",
"permalink": "pmatch-the-blist-ib-with-blist-iibpstyletab-jee-main-chemistry-28sk9xcpp9g9jox3",
"question": {
"en": {
"comprehension": null,
"direction": null,
"content": "<p>Match the <b>LIST-I</b> with <b>LIST-II</b></p><style>table {width: 100%;border-collapse: collapse;margin: 20px 0;}th {background-color: blue;color: white;border: 1px solid lightgrey;padding: 10px;}td {border: 1px solid lightgrey;padding: 10px;text-align: left;}</style><table><tr><th>LIST-I<br>(Complex/ Species)</th><th>LIST-II<br>(Shape & magnetic moment)</th></tr><tr><td>A. [Ni(CO)<sub>4</sub>]</td><td>I. Tetrahedral, 2.8 BM</td></tr><tr><td>B. [Ni(CN)<sub>4</sub>]<sup>2–</sup></td><td>II. Square planar, 0 BM</td></tr><tr><td>C. [NiCl<sub>4</sub>]<sup>2–</sup></td><td>III. Tetrahedral, 0 BM</td></tr><tr><td>D. [MnBr<sub>4</sub>]<sup>2–</sup></td><td>IV. Tetrahedral, 5.9 BM</td></tr></table><p>Choose the <b>correct</b> answer from the options given below:</p>",
"options": [
{
"identifier": "A",
"content": "<p>A-I, B-II, C-III, D-IV</p>"
},
{
"identifier": "B",
"content": "<p>A-IV, B-I, C-III, D-II</p>"
},
{
"identifier": "C",
"content": "<p>A-III, B-II, C-I, D-IV</p>"
},
{
"identifier": "D",
"content": "<p>A-III, B-IV, C-II, D-I</p>"
}
],
"correct_options": [
"C"
],
"answer": null,
"explanation": "<p>(A) $left[mathrm{Ni}(mathrm{CO})_4\right], mathrm{Ni}^0:[mathrm{Ar}] 3 mathrm{~d}^8 4 mathrm{~s}^2$</p> <p>Valence orbitals of $mathrm{Ni}^0$ in pre-hybridisation state :</p> <p><img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m9gnbpm3/c0274ce3-eee1-4b72-b4c0-511d8cc0acae/1c0e8ac0-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gnbpm4.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/jaoe38c1m9gnbpm3/c0274ce3-eee1-4b72-b4c0-511d8cc0acae/1c0e8ac0-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gnbpm4.png\" loading=\"lazy\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto; max-height: 40vh; vertical-align: baseline\" alt=\"JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Coordination Compounds Question 23 English Explanation 1\"></p> <p>Tetrahedral, Diamagnetic, $mu=0$ B.M.</p> <p>(B) $left[mathrm{Ni}(mathrm{CN})_4\right]^{2-}, mathrm{Ni}^{+2}:[mathrm{Ar}] 3 mathrm{~d}^8 4 mathrm{~s}^0$</p> <p>Valence orbitals of $mathrm{Ni}^{+2}$ in pre-hybridisation state :</p> <p><img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m9gndlcx/5cc38626-d818-4b28-9b6a-c905296df9f0/50634d10-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gndlcy.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/jaoe38c1m9gndlcx/5cc38626-d818-4b28-9b6a-c905296df9f0/50634d10-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gndlcy.png\" loading=\"lazy\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto; max-height: 40vh; vertical-align: baseline\" alt=\"JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Coordination Compounds Question 23 English Explanation 2\"></p> <p>Square planar, Diamagnetic, $mu=0$ B.M.</p> <p>(C) $left[mathrm{NiCl}_4\right]^{2-}, mathrm{Ni}^{+2}:[mathrm{Ar}] 3 mathrm{~d}^8 4 mathrm{~s}^0$</p> <p>Valence orbitals of $mathrm{Ni}^{+2}$ in ground state :</p> <p><img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m9gnf8ng/c75cbf91-2534-482a-a9c5-c00c2f173d65/7e309cc0-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gnf8nh.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/jaoe38c1m9gnf8ng/c75cbf91-2534-482a-a9c5-c00c2f173d65/7e309cc0-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gnf8nh.png\" loading=\"lazy\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto; max-height: 40vh; vertical-align: baseline\" alt=\"JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Coordination Compounds Question 23 English Explanation 3\"></p> <p>Tetrahedral, paramagnetic, $mu=sqrt{8}=2.8$ B.M.</p> <p>(D) $left[mathrm{MnBr}_4\right]^{2-}, mathrm{Mn}^{+2}:[mathrm{Ar}] 3 mathrm{~d}^5$</p> <p>Valence orbitals of $mathrm{Mn}^{+2}$ in ground state :</p> <p><img src=\"https://app-content.cdn.examgoal.net/fly/@width/image/jaoe38c1m9gngts9/97a50da1-8d01-42d8-b0dc-f0c138ffe928/aa52fb90-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gngtsa.png?format=png\" data-orsrc=\"https://app-content.cdn.examgoal.net/image/jaoe38c1m9gngts9/97a50da1-8d01-42d8-b0dc-f0c138ffe928/aa52fb90-18f3-11f0-88c8-2982f238cb5a/file-jaoe38c1m9gngtsa.png\" loading=\"lazy\" style=\"max-width: 100%; height: auto; display: block; margin: 0 auto; max-height: 40vh; vertical-align: baseline\" alt=\"JEE Main 2025 (Online) 8th April Evening Shift Chemistry - Coordination Compounds Question 23 English Explanation 4\"></p> <p>Tetrahedral, paramagnetic, $mu=sqrt{35}=5.9$ B.M.</p>"
},
"hi": {
"direction": null,
"comprehension": null,
"content": "<p>सूची-I का सूची-II के साथ मिलान करें</p> <p><style type=\"text/css\"> .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break:normal;} .tg th{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; font-weight:normal;overflow:hidden;padding:10px 5px;word-break:normal;} .tg .tg-baqh{text-align:center;vertical-align:top} .tg .tg-amwm{font-weight:bold;text-align:center;vertical-align:top} .tg .tg-0lax{text-align:left;vertical-align:top} </style> <table class=\"tg\" style=\"undefined;table-layout: fixed; width: 573px\"><colgroup> <col style=\"width: 97px\"> <col style=\"width: 197px\"> <col style=\"width: 82px\"> <col style=\"width: 197px\"> </colgroup> <thead> <tr> <th class=\"tg-amwm\"></th> <th class=\"tg-amwm\">सूची-I<br>(संकुल/जाती)</th> <th class=\"tg-amwm\"></th> <th class=\"tg-amwm\">सूची-II<br>(आकृति और चुम्बकीय आघूर्ण)</th> </tr></thead> <tbody> <tr> <td class=\"tg-baqh\">A.</td> <td class=\"tg-0lax\">$left[mathrm{Ni}(mathrm{CO})_4\right]$</td> <td class=\"tg-baqh\">I.</td> <td class=\"tg-0lax\">चतुष्फलकीय, 2.8 BM</td> </tr> <tr> <td class=\"tg-baqh\">B.</td> <td class=\"tg-0lax\">$left[mathrm{Ni}(mathrm{CN})_4\right]^{2-}$</td> <td class=\"tg-baqh\">II.</td> <td class=\"tg-0lax\">वर्ग समतलीय, 0 BM</td> </tr> <tr> <td class=\"tg-baqh\">C.</td> <td class=\"tg-0lax\">$left[mathrm{NiCl}_4\right]^{2-}$</td> <td class=\"tg-baqh\">III.</td> <td class=\"tg-0lax\">चतुष्फलकीय, 0 BM</td> </tr> <tr> <td class=\"tg-baqh\">D.</td> <td class=\"tg-0lax\">$left[mathrm{MnBr}_4\right]^{2-}$</td> <td class=\"tg-baqh\">IV.</td> <td class=\"tg-0lax\">चतुष्फलकीय, 5.9 BM</td> </tr> </tbody></table></p> <p>नीचे दिए गए विकल्पों में से सही उत्तर का चयन करें:</p>",
"options": [
{
"identifier": "A",
"content": " A-I, B-II, C-III, D-IV "
},
{
"identifier": "B",
"content": " A-IV, B-I, C-III, D-II "
},
{
"identifier": "C",
"content": " A-III, B-II, C-I, D-IV "
},
{
"identifier": "D",
"content": " A-III, B-IV, C-II, D-I"
}
],
"correct_options": [
"C"
],
"answer": null,
"explanation": null
}
},
"section": [
"chapter",
"paper"
],
"subject": "chemistry",
"timeAllotted": 144000,
"topic": "crystal-field-theory-cft",
"type": "mcq",
"year": 2025,
"bookmark": {
"en": {
"title": "JEE Main 2025 (Online) 8th April Evening Shift",
"subTitle": "Coordination Compounds • Chemistry",
"excerpt": "Match the LIST-I with LIST-IItable {width: 100%;border-collapse: collapse;margin: 20px 0;}th {background-color: blue;color: white;border: 1px solid lightgrey;padding: 10px;}td {border: 1px solid lightgrey;padding: 10px;text-align: left;}LIS..."
},
"hi": {
"title": "JEE Main 2025 (Online) 8th April Evening Shift",
"subTitle": "Coordination Compounds • Chemistry",
"excerpt": "सूची-I का सूची-II के साथ मिलान करें .tg {border-collapse:collapse;border-spacing:0;} .tg td{border-color:black;border-style:solid;border-width:1px;font-family:Arial, sans-serif;font-size:14px; overflow:hidden;padding:10px 5px;word-break..."
}
},
"yearKey": "jee-main-2025-online-8th-april-evening-shift"
}]
}]}