Which of the following molecules has one lone pair of electrons on the central atom

Which of the following molecules contain one lone pair of electrons on the centrals atom?

Which of the following molecules contain one lone pair of electrons on the cenrals atom?

Which of the following molecules show lone pair of electrons?

Which one of the following molecules contain one lone pair of electrons on the central atom?

Which set of the following molecules has only one lone pair of electrons on their respective central atoms ? (i) SO_(2) (ii) XeF_(4) PbCl_(2) (iv) SF_(4) (v) CIF_(3)

Which of the following pair contains 2 lone pairs of electrons on the central atom?