Alkyl halides undergoing nucleophilic bimolecular substitution reaction involve:
Step 1: Understanding nucleophilic bimolecular substitution (SN2). In an SN2 reaction, the nucleophile attacks the carbon opposite to the leaving group, leading to the inversion of configuration.
Step 2: Conclusion. Thus, SN2 reactions involve inversion of configuration, corresponding to option (C).





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 \(P,O,Q\).