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CBSE Class 11 Chemistry MCQs on p-Block Elements – Group 13 & 14
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Online Practice Test: Properties of Boron, Aluminium, and Carbon (Class 11)
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CBSE Class 11 Inorganic Chemistry MCQ Test: Boron, Aluminium & Carbon
Introduction Paragraph
Master your understanding of the p-Block Elements (Group 13 and 14) with this CBSE Class 11 Chemistry MCQ Practice Test, focusing on the Properties of Boron, Aluminium, and Carbon. This online quiz is designed strictly as per the NCERT Class 11 Chemistry syllabus, ensuring conceptual clarity and exam-level practice. The p-Block elements play a vital role in Inorganic Chemistry, covering important concepts like electron deficiency, amphoteric behavior, allotropy, and covalent bonding tendencies.
Each multiple-choice question (MCQ) is crafted to test both theoretical understanding and application-based reasoning, making it ideal for CBSE Board Exam preparation, competitive exams like NEET and JEE (Main), and school-level assessments. Students can assess their knowledge through instant feedback and detailed explanations provided for every question.
Strengthen your grasp on the chemistry of Boron, Aluminium, and Carbon with this interactive quiz and build a solid foundation for higher-level studies. Start practicing now to excel in your Class 11 Chemistry journey!
Sample MCQs (with Answers and Explanations)
Q1. Which of the following compounds of boron contains B–B bonds?
A) BCl₃
B) BF₃
C) B₂H₆
D) NaBH₄
Answer: C) B₂H₆
Explanation: Diborane (B₂H₆) contains B–B bonds and shows three-center two-electron bonding, making it an electron-deficient compound.
Q2. Which property explains why boron forms covalent compounds rather than ionic ones?
A) Low ionization enthalpy
B) High electronegativity
C) Small size and high polarizing power
D) Metallic nature
Answer: C) Small size and high polarizing power
Explanation: Due to its small atomic size and high charge density, boron tends to form covalent compounds instead of ionic ones.
Q3. Aluminium reacts with both acids and bases. This property is called:
A) Amphoterism
B) Oxidation
C) Reduction
D) Passivation
Answer: A) Amphoterism
Explanation: Aluminium exhibits amphoteric behavior, forming salts with acids and aluminates with bases like NaOH.
Q4. Which allotrope of carbon is the hardest natural substance?
A) Graphite
B) Diamond
C) Fullerene
D) Charcoal
Answer: B) Diamond
Explanation: Diamond has a 3D tetrahedral network of sp³ hybridized carbon atoms, making it the hardest known material.
Q5. The oxidation state of carbon in CO₂ is:
A) +2
B) +4
C) 0
D) -2
Answer: B) +4
Explanation: Oxygen has -2 oxidation state. With two oxygen atoms (-4 total), carbon must have +4 to balance the compound.
✅ Highlight:
These MCQs on p-Block Elements (Boron, Aluminium, and Carbon) are strictly based on the NCERT Class 11 Chemistry syllabus, making them perfect for CBSE Board exam practice and concept reinforcement.