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#bonding

9 public questions tagged with this topic.

CHEMISTRY

What is the total number of pi ( π ) bonds in CH₃C#CCH₃ ?

In CH₃C#CCH₃, the triple bond (C≡C) consists of 1 sigma and 2 pi bonds. There are no other multiple bonds. Total π bonds = 2. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.

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CHEMISTRY

How many sigma bonds are present in the C₂H₄ molecule?

C₂H₄ has a double bond (1 sigma, 1 pi) between carbons and 4 single bonds (4 sigma) to hydrogens. Total sigma bonds = 1 + 4 = 5. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Chemistry Textbook - Latest Edition for Academic Session 2026-27 (Rationalized Textbook for Class XI and XII)Topic: Mole concept, atomic structure, chemical formulas like H₂O, CO₂, CH₃CH₂NH₂ and periodic trends.

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Young's Modulus and Elasticity

What is the primary reason solids are far less compressible than gases?

The tight coupling between neighboring atoms in solids results in a much higher resistance to volume change compared to gases, where molecules are weakly coupled. As per NCERT, applying relevant law/formula with correct units and sign convention leads to Tight coupling between neighboring atoms. This satisfies dimensional consistency and physical conditions given, so option A is scientifically correct.

Ref: NCBI Bookshelf, Ideal Gas Law: P1V1/T1 = P2V2/T2.

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Genesis of Periodic Classification - Dobereiner Newlands Mendeleev

Which of the following fluorides has the highest ionic character?

Ionic character increases with larger cation size and lower polarizing power in group 2. BaF₂ (Ba²⁺, largest) has the highest ionic character among BeF₂, MgF₂, CaF₂, and BaF₂.

Ref: NCERT Class 11 Chemistry > Chapter 3: Classification of Elements and Periodicity in Properties > Topic: Genesis of Periodic Classification - Dobereiner Newlands Mendeleev

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