Which of the following molecule is linear?

Which of the following molecules is linear ?

Which of the following molecules is linear ?

Which of the following molecules is linear ?

Which of the following molecules is linear ?

The geometry of a molecule depends upon the repulsions between electron pairs present in the valance shell of the central atom. LP - LP repulsions are greater than LP-BP which are greater than BP - BP. A pi bond can not decide the geometry of a molecule because pi bond has no independent exsistance. Deviations in bond angle are due to the presence of lone pairs. Which of the following molecule is linear in shape ?

Which of the following molecules in linear?

Which of the following molecule froms linear polymeric structure due to H-bonding ?

Which of the following molecule forms linear polymeric structure due to H-bonding ?