Q. Consider the following processes
Process (1) $C_{2} H_{5} O H / H^{\oplus}, L i A l H_{4}, PCC$
Process (2) $N a B H_{4}, C u /30 0^{\circ} C$
Process (3) $PC l_{5}, L i A l H_{4}, C r O_{3} / H_{2} S O_{4}$
Process (4) $SOC l_{2}, P d / B a S O_{4} / H_{2}$
The process by which acetic acid can be converted into acetaldehyde is/are

267 152 Aldehydes Ketones and Carboxylic Acids Report Error

1,2,3,4

Solution: