Methods of Preparation — Prelims Questions

Which of the following reagents is used to convert a primary alcohol to an aldehyde without further oxidizing it to a carboxylic acid?

Identify the product formed when 2-butyne is hydrated in the presence of $HgSO_4/H_2SO_4$.

Which of the following reactions is suitable for the preparation of benzaldehyde from toluene?

Which of the following reagents would convert propanenitrile ($CH_3CH_2C equiv N$) into propanal ($CH_3CH_2CHO$)?

An alkene with the formula $C_5H_{10}$ on ozonolysis followed by reductive workup ($Zn/H_2O$) gives a mixture of propanone and ethanal. What is the structure of the alkene?

Which of the following reactions will yield an aromatic ketone?