DDT (dichlorodiphenyltrichloroethane) and Aldrin are well-known pesticides.
PAN (peroxyacetyl nitrate) is a component of photochemical smog.
Sodium chlorate is a herbicide and defoliant.
Sodium arsinite has been used as an insecticide and rodenticide.
Tetrachloroethene is used in dry cleaning.
Therefore, the correct group of chemicals used as pesticides is DDT and Aldrin.
Calculate the potential for half-cell containing 0.01 M K\(_2\)Cr\(_2\)O\(_7\)(aq), 0.01 M Cr\(^{3+}\)(aq), and 1.0 x 10\(^{-4}\) M H\(^+\)(aq).
A bob of mass \(m\) is suspended at a point \(O\) by a light string of length \(l\) and left to perform vertical motion (circular) as shown in the figure. Initially, by applying horizontal velocity \(v_0\) at the point ‘A’, the string becomes slack when the bob reaches at the point ‘D’. The ratio of the kinetic energy of the bob at the points B and C is: