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प्रश्न
What happens when ethanol is heated at 443K in the presence of conc. H2SO4? Write the role of conc. H2SO4 in this case.
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उत्तर
Reaction to give unsaturated hydrocarbon: Heating ethanol at 443 K with excess concentrated sulphuric acid results in the dehydration of ethanol to give ethene –
\[\ce{CH3-CH2OH ->[Hot Conc{.}][443K H2SO4]CH2 = CH2 + H2O}\]
The concentrated sulphuric acid can be regarded as a dehydrating agent which removes water from ethanol.
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संबंधित प्रश्न
Match the formulae in group A with appropriate names from group B:
Group A: CH3COOH, CH3CHO, CH3OH
Group B: Ethanol, Methanol, Ethanal, Ethanoic acid
Complete the following equation:
`CH_3 CH_2 OH` 
When ethanol is heated with concentrated sulphuric acid at 170°C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as:
(a) oxidising agent
(b) catalyst
(c) dehydrating agent
(d) reducing agent
What would you see, when ethyne is bubbled through a solution of bromine in carbon tetrachloride?
Identify the functional group of the CH3OH ?
In a tabular form, differentiate between ethanol and ethanoic acid under the following heads:
(i) Physical state
(ii) Taste
(iii) NaHCO3 test
(iv) Ester test
Write the equation for the following lab preparation:
Methanol from iodomethane.
Colorless ethanol is in liquid state at room temperature.
C2H5OH + 3O2 → 2CO2 + 3H2O is a ______
A gas is evolved when ethanol reacts with sodium. Name the gas evolved and also write the balanced chemical equation of the reaction involved.
