When vapours of secondary alcohol are passed over hot copper at 573K, the 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 isopropyl alcohol are passed over heated copper, the major product obtained is

When the vapours of tertiary butyl alcohol are passed through heated copper at 573 K, the product formed is

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

When the vapours of tertiary butyl alcohol are passed through heated copper at 578 K, the product formed is