A compound with 10 σ bonds and 2 π bonds has the formula C₅H₆. Which carbon has a bond angle of 180°?
CH₂=CHC≡CH fits C₅H₆. The fourth carbon (C≡) is sp, with a 180° angle.
Ref: NCERT Class 11 Chemistry > Chapter 8: Organic Chemistry - Some Basic Principles and Techniques > Topic: Qualitative and Quantitative Analysis - Lassaigne Test and Estimation