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 ?

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?