On heating ethanol with concentrated H2SO4 at 443 K gives-

Correct option is B

The correct answer is (b) Ethene.
· On heating ethanol (C2H5OH) with concentrated sulfuric acid (H2SO4​) at 443 K, ethene (C2H4​) is produced. This reaction is known as dehydration of ethanol, where water is removed from the ethanol molecule to form ethene.
Reaction:

Explanation of Other Options:
· Ethane : Not formed in this reaction; requires hydrogenation of ethene.
· Ethyne : Formed from calcium carbide or other reactions, not directly from ethanol dehydration.
· Methane : Not related to the dehydration of ethanol.