Repulsion between bond pair-bond pair is than in between lonepairlone pair.

Show that the equation of the pair of lines bisecting the angles between the pair of bisectors of the angles between the pair of lines a x^2+2h x y+b y^2=0 is (a-b)(x^2-y^2)+4h x y=0.

Find the distance between the following pairs of points .

Consider two pairs of neutrons. In each pair, the separation between the neutrons is the same. Can the force between the neutron have different magnitudes for the two pairs?

Calculate the length of the DNA thread, if the DNA has 4.7 xx 10^(-9) base pairs. Length of the DNA = Total number of base pairs xx distance between two consecutive base pairs.

If the electronegativity difference between two bonded atoms in a molecule is greater than 1.7, the nature of bonding is ____