In Chapter 11 of NCERT Solutions for Class 11 Maths PDF, the focus is on various aspects of a cone, including parabola, ellipse, circle, degenerate conic sections, and hyperbola. The chapter of NCERT 11 maths solutions also covers significant topics such as the correlation between semi-minor axis, semi-major axis, the distance of focus from the center of the ellipse, and standard equations of parabola and ellipse. This chapter holds great importance in class 11 maths solutions  as it lays the foundation for understanding essential concepts related to conic sections that would be further explored in higher classes.