JEE Main Inorganic — p/d/f Block & Coordination: p-Block Elements – Chapter Test
JEE Main Inorganic — p/d/f Block & Coordination: p-Block Elements – Chapter Test is an online chapter 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 | 20 |
Difficulty: 10 medium · 10 hard
p-Block Elements MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. Which of the following oxides is NOT acidic in nature?
निम्नलिखित में से कौन-सा ऑक्साइड प्रकृति में अम्लीय नहीं है?
- A. CO2
- B. SO3
- C. Al2O3
- D. N2O5
Solution
Al2O3 is amphoteric, reacting with both acids and bases, so it is not acidic. CO2, N2O5 and SO3 are all acidic oxides of non-metals that give oxoacids with water.
Al2O3 उभयधर्मी है, जो अम्ल और क्षार दोनों से अभिक्रिया करता है, अतः यह अम्लीय नहीं है। CO2, N2O5 और SO3 सभी अधातुओं के अम्लीय ऑक्साइड हैं जो जल के साथ ऑक्सोअम्ल देते हैं।
Q2. Consider the following statements about the oxides of group 13 elements: 1. Boron trioxide, B2O3, is acidic in nature. 2. Al2O3 and Ga2O3 are amphoteric, reacting with both acids and bases. 3. Tl2O3 is strongly acidic and does not react with mineral acids. Which of these statements are correct?
समूह 13 तत्वों के ऑक्साइडों के बारे में निम्नलिखित कथनों पर विचार करें: 1. बोरॉन ट्राइऑक्साइड, B2O3, प्रकृति में अम्लीय है। 2. Al2O3 और Ga2O3 उभयधर्मी (amphoteric) हैं, जो अम्लों और क्षारों दोनों के साथ अभिक्रिया करते हैं। 3. Tl2O3 प्रबल रूप से अम्लीय है और खनिज अम्लों के साथ अभिक्रिया नहीं करता। इनमें से कौन से कथन सही हैं?
- A. 1, 2 and 3 / 1, 2 और 3
- B. 2 and 3 only / केवल 2 और 3
- C. 1 and 2 only / केवल 1 और 2
- D. 1 and 3 only / केवल 1 और 3
Solution
Statements 1 and 2 are correct: B2O3 is an acidic nonmetal oxide, while Al2O3 and Ga2O3 are amphoteric. Statement 3 is incorrect because thallium, being the most metallic member of group 13, forms a predominantly basic oxide, Tl2O3, which readily reacts with acids, reflecting the increase in metallic and basic character down the group.
कथन 1 और 2 सही हैं: B2O3 एक अम्लीय अधातु ऑक्साइड है, जबकि Al2O3 और Ga2O3 उभयधर्मी हैं। कथन 3 गलत है क्योंकि थैलियम, समूह 13 का सबसे अधिक धात्विक सदस्य होने के कारण, मुख्यतः क्षारीय ऑक्साइड Tl2O3 बनाता है, जो अम्लों के साथ आसानी से अभिक्रिया करता है, जो समूह में नीचे जाने पर धात्विक और क्षारीय गुण में वृद्धि को दर्शाता है।
Q3. 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।
Frequently asked questions
How many questions are in the JEE Main Inorganic — p/d/f Block & Coordination: p-Block Elements – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the JEE Main Inorganic — p/d/f Block & Coordination: p-Block Elements – Chapter 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: p-Block Elements – Chapter Test cover?
Inorganic — p/d/f Block & Coordination (20 questions).
Is the JEE Main Inorganic — p/d/f Block & Coordination: p-Block Elements – Chapter 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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