JEE Main Inorganic — p/d/f Block & Coordination – Topic Test
JEE Main Inorganic — p/d/f Block & Coordination – Topic Test is an online topic test in the JEE Main pattern, covering Inorganic — p/d/f Block & Coordination. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Inorganic — p/d/f Block & Coordination | 30 |
Difficulty: 15 medium · 15 hard
Inorganic — p/d/f Block & Coordination MCQ questions with answers
The first 3 of 30 questions. Unlock the series for the rest, each with a solution.
Q1. According to IUPAC rules for naming coordination compounds, the names of the ligands within the coordination sphere are cited in which order?
समन्वय यौगिकों (coordination compounds) के नामकरण हेतु IUPAC नियमों के अनुसार, समन्वय क्षेत्र (coordination sphere) में उपस्थित लिगैंडों (ligands) के नाम किस क्रम में लिखे जाते हैं?
- A. Order of increasing negative charge on the ligand / लिगैंड पर बढ़ते हुए ऋणात्मक आवेश के क्रम में
- B. Order of decreasing denticity of the ligand / लिगैंड की घटती हुई डेन्टिसिटी (denticity) के क्रम में
- C. The same order in which the ligands appear in the chemical formula / वही क्रम जिसमें लिगैंड रासायनिक सूत्र में प्रकट होते हैं
- D. Alphabetical order, irrespective of the charge or number of each ligand / आवेश या प्रत्येक लिगैंड की संख्या पर ध्यान दिए बिना वर्णानुक्रम में
Solution
IUPAC rules require ligands to be named in alphabetical order, irrespective of their charge or the multiplying prefix used to indicate how many of each are present; the multiplying prefix itself is ignored while alphabetizing.
IUPAC नियमों के अनुसार लिगैंडों के नाम उनके आवेश या प्रत्येक की संख्या दर्शाने वाले बहुगुणक पूर्वलग्न (multiplying prefix) पर ध्यान दिए बिना वर्णानुक्रम (alphabetical order) में लिखे जाते हैं; वर्णानुक्रम निर्धारित करते समय बहुगुणक पूर्वलग्न को नज़रअंदाज़ किया जाता है।
Q2. Arrange the boron trihalides in the correct order of increasing Lewis acid strength: BF3, BCl3, BBr3, BI3.
बोरॉन ट्राइहैलाइडों को बढ़ती हुई लूइस अम्ल प्रबलता के सही क्रम में व्यवस्थित कीजिए: BF3, BCl3, BBr3, BI3।
- A. BF3 < BI3 < BBr3 < BCl3
- B. BF3 < BCl3 < BBr3 < BI3
- C. BCl3 < BF3 < BI3 < BBr3
- D. BI3 < BBr3 < BCl3 < BF3
Solution
Lewis acidity of BX3 increases BF3 < BCl3 < BBr3 < BI3 because pπ–pπ back-donation from halogen to the empty boron 2p orbital is strongest (and best size-matched) in BF3 and weakest in BI3, leaving boron most electron-deficient in BI3.
BX3 की लूइस अम्लता BF3 < BCl3 < BBr3 < BI3 क्रम में बढ़ती है क्योंकि हैलोजन से बोरॉन के रिक्त 2p कक्षक की ओर pπ–pπ पश्च-दान (back-donation) BF3 में सबसे प्रबल (और सर्वोत्तम आकार-मिलान वाला) तथा BI3 में सबसे दुर्बल होता है, जिससे BI3 में बोरॉन सर्वाधिक इलेक्ट्रॉन-न्यून रह जाता है।
Q3. Match List I (molecule) with List II (hybridisation of the central atom) and choose the correct option. List I: A. BF3 B. CO2 C. PCl5 D. SF6; List II: 1. sp 2. sp2 3. sp3d 4. sp3d2.
सूची I (अणु) का सूची II (केंद्रीय परमाणु का संकरण) से मिलान कीजिए और सही विकल्प चुनिए। सूची I: A. BF3 B. CO2 C. PCl5 D. SF6; सूची II: 1. sp 2. sp2 3. sp3d 4. sp3d2।
- A. A-2, B-1, C-4, D-3
- B. A-3, B-1, C-2, D-4
- C. A-2, B-1, C-3, D-4
- D. A-1, B-2, C-4, D-3
Solution
BF3 is trigonal planar (sp2), CO2 is linear with sp carbon, PCl5 is trigonal bipyramidal (sp3d), and SF6 is octahedral (sp3d2).
BF3 त्रिकोणीय समतलीय (sp2) है, CO2 रैखिक है जिसमें कार्बन sp संकरित है, PCl5 त्रिकोणीय द्विपिरामिडी (sp3d) है, और SF6 अष्टफलकीय (sp3d2) है।
Frequently asked questions
How many questions are in the JEE Main Inorganic — p/d/f Block & Coordination – Topic Test?
30 questions for 30 marks, to be answered in 30 minutes.
Is there negative marking in the JEE Main Inorganic — p/d/f Block & Coordination – Topic Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the JEE Main Inorganic — p/d/f Block & Coordination – Topic Test cover?
Inorganic — p/d/f Block & Coordination (30 questions).
Is the JEE Main Inorganic — p/d/f Block & Coordination – Topic Test free?
It is part of the JEE Main 2027 Mock Test Series (104 tests, ₹299). You can first try Basic Concepts & Atomic Structure – Topic Test for free.
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