Which of the following compound is possible :

How many stereoisomers of the following compounds is/are possible?

Which of the following reactions are possible ?

Which of the following reactions are possible ?

In which of the following compounds, delocalized bonding is not possible?

In the which of the following compounds mesomerie effect is possible? Vinyl chloride , b) Allyl chloride and c) 3- Butenal

In Lassaigne's test the organic compound is fused with Na followed by extraction with distilled water. Which of the following is not possible fusion product?

In which of the following compounds one pi bond is present and maximum canonical structures possible