Given that ionisation potential and electron gain enthalpy of chlorine are 13eV and 4 eV respectively. The electronegativity of chlorine on Mulliken scale, approximately equals to

Which of the following will have maximum dipole moment?

In which of the following molecules/ions, the central atom is sp$$^2$$ hybridised?

BF$$_3$$, NO$$_2^-$$, NH$$_2^-$$ and H$$_2$$O

For which molecules among the following, the resultant dipole moment ($$\propto$$) $$\ne$$ 0 ?