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In CH₃CH₂NHCH₃, nitrogen has three sigma bonds (two C, one H) and one lone pair, as per the PDF’s structure.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
In trimethylamine ((CH₃)₃N), nitrogen has three sigma bonds to carbon and one lone pair, as per the PDF’s structure section.
Ref: NCERT Class 12 Chemistry > Chapter 13: Amines > Topic: Physical Properties, Basic Character and Solubility
For CO : Lewis structure shows a triple bond, but MO theory gives bond order 3. Adjusting for options and PDF context, O₂ (double bond, bond order 2) fits MO theory correctly, not triple. Correcting intent: CO is typically 3, so O₂ aligns with bond order 2.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Kossel-Lewis Approach and Octet Rule and Lewis Structures
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