1.

The mixture of ethanol and H_2SO_4 is distilled in distillation flask at 140^@C. The flask would then contain

Answer»

`H_2SO_4` and `C_2H_5-O-C_2H_5` only
`H_2O, H_2SO_4` and `C_2H_5OSO_3H` only
`H_2O , C_2H_5OSO_3H, C_2H_5`
`C_2H_5-O-C_2H_5, C_2H_5OSO_3H, H_2SO_4` and `H_2O`

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