Excess of vapours of ethyl alcohol when passed over heated `Al_2O_3` at

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

Vapour of tertiary butyl alchol , when passed over heated Al_2O_3 ( at around 575K), gives

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

What happens when vapours of ter-butyl alcohol are passed over heated copper at 300^@ C?

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

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

When vapour of alcohol are passed under pressure over heated Al_(2)O_(3) at 523K, the product obtained is :

Name the main product obtained when vapour of tert-butyl alcohol are passed over heated copper at 573 K.

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