When vapours of ethyl alcohol are passed over alumina at 523K, if forms

When vapours of ethyl alcohol are passed over Al_2O_3 , at 533 K, it forms

When excess vapour of ethyl alcohol are passed over heated alumina at 523K, the main product formed is

What happens when ? (a) Ethyl bromide reacts with sodium ethoxide. (b) Ethyl alcohol is heated with conc. H_(2)SO_(4) at 413 K . (c ) The vapours of ethyl alcohol are passed over anhydrous alumina at 523K. (d) Diethyl ether is heated with phosphorus pentachloride. (e ) Ethyl iodide is heated with dry oxide. (f) Ether is heated with hydroiodic acid. (g ) Ether i sheated with conc. H_(2)SO_(4) . [See the preparation and properties of diethyl ether. ]

When excess vapours of ethyl alcohol are passed over heated alumina (25^(@)C) , the main product formed is :

The vapours of ethyl alcohol are passed over red hot copper at 573 K to form:

The vapours of ethyl alcohol are passed over red hot copper at 573 K to form:

When vapours of ethyl alcohol are passed over Al_(2)O_(3) at 250^(@)C , it forms

When vapours of tert.butyl alcohol are passed over hot copper, it gives ....

What is the main product obtained when vapours of tert.-butyl alcohol are passed over copper at 573K?