Acetic anhydride is obtained from acetyl chloride by the reaction of

Decarboxylation of isobutyric acid gives .....

$A \xrightarrow{LiAlH_4} 2B$ (Chiral alcohol only); structure of $A$ is

Which of the following does not give an alcohol with $NaBH_4$?

Fruity smell is given by

Oxalic acid reacts with concentrated $H_2SO_4$ to give a mixture of two gases. When this mixture is passed through caustic potash,one of the gases is absorbed. What is the product formed by the absorbed gas with caustic potash?