WBCS (Executive) 2017 Prelims Previous Year Paper

The controlled partial conversion of propyne (${\text{CH}}_3\text{C}\equiv \text{CH}$) to propene (${\text{CH}}_3\text{CH}={\text{CH}}_2$) requires which of the following reagents?

The synthesis conversion of an alkyl bromide ($\text{RBr}$) to a Grignard reagent ($\text{RMgBr}$) requires which of the following experimental conditions?

Which of the following compounds undergoes the fastest ${\text{S}}_{\text{N}}1$ substitution reaction?

Which of the following options serves as an example of a modified underground stem?

Genetic crossing over occurs during which specific stage of meiotic cell division?