The isomer of C4H9Cl with the lowest boiling point is tert-butyl chloride (C4H9Cl), also known as 2-chloro-2-methylpropane (CH3)3C-Cl.
This is because the high degree of branching in the tert-butyl chloride molecule reduces the surface area available for intermolecular interactions, such as Van der Waals forces. With fewer opportunities for these interactions, the molecule is easier to vaporize, leading to a lower boiling point compared to less branched isomers, such as n-butyl chloride or sec-butyl chloride.





Consider the following reaction of benzene. the percentage of oxygen is _______ %. (Nearest integer) 
A racing track is built around an elliptical ground whose equation is given by \[ 9x^2 + 16y^2 = 144 \] The width of the track is \(3\) m as shown. Based on the given information answer the following: 
(i) Express \(y\) as a function of \(x\) from the given equation of ellipse.
(ii) Integrate the function obtained in (i) with respect to \(x\).
(iii)(a) Find the area of the region enclosed within the elliptical ground excluding the track using integration.
OR
(iii)(b) Write the coordinates of the points \(P\) and \(Q\) where the outer edge of the track cuts \(x\)-axis and \(y\)-axis in first quadrant and find the area of triangle formed by points \(P,O,Q\).