Question

when ethanol is heating in presence of concentrated sulphuric acid at temp of 443k

Answer 1

                    Δ443K
CH₃CH₂OH---------------------->CH₂=CH₂+H₂O
                  H₂SO₄

i HOPE It MaY Be HeLpFuLl for u

Answer 2

Hello!

Here is your answer!
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As H2SO4 or Sulpuric acid is a strong dehydrating agent ethanol gets dehydrated and  forms ethene gas.

Sulphuric acid acts only as a catalyst. 

Catalyst is a substance that increases the rate of a chemical reaction without being consumed in the process.

The water or H2O  produced from the reaction gets mixed with sulphuric acid (H2SO4) and it gets diluted.

Equation: C2H5OH  ----------------------------------------------------- >  C2H4 + H2O

                              excess of H2SO4 & high temperature 443K

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Hope it helps!