Which of the following molecules does NOT contain a lone pair of electron ?

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

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

In which of the following molecules, the central atom has two lone pairs of electrons ?

Which among the following molecules contains only bonded pairs or no lone pairs of electrons on the central atom?

Which of the following molecules show lone pair of electrons?

Give reasons for the following: A molecule of ammonia has one lone pair of electrons.