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JEE Main levelOne or more correct optionsDifficulty 2 of 3o4193

Ethanol reacts with conc. . Which statements are correct?

  1. AAt about 413 K with excess ethanol, diethyl ether is the main product.
  2. BAt about 443 K with excess acid, ethene is the main product.
  3. CEther formation involves attack of an ethanol molecule on protonated ethanol (SN2).
  4. DAt 443 K with excess acid, diethyl ether is the main product.

Answer: A, B, C

Low temperature with alcohol in excess favours substitution: . Higher temperature and excess acid favour elimination to ethene. Statement 4 is therefore wrong; 1, 2 and 3 are correct.
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