10th Class Science Solved Paper - Science-2017 Outside Delhi Set-I

Write the structural formula of ethanol. What happens when it is heated with excess of conc. \[{{H}_{2}}S{{O}_{4}}\] at 443 K, ? Write the chemical equation or the reaction stating the role of cone. \[{{H}_{2}}S{{O}_{4}}\] in this reaction.

Answer:

Structural formula of ethanol is: \[C{{H}_{3}}C{{H}_{2}}OH\]

When ethanol is heated with excess of cone. \[{{H}_{2}}S{{O}_{4}}\] at 443 K it results in the dehydration of ethanol to give ethene.

\[\underset{Ethanol}{\mathop{C{{H}_{3}}C{{H}_{2}}OH}}\,\xrightarrow[443K]{Conc.{{H}_{2}}S{{O}_{4}}}\mathrm{ }\underset{Ethene}{\mathop{C{{H}_{2}}}}\,=C{{H}_{2}}+{{H}_{2}}O\]

Role of conc.\[{{H}_{2}}S{{O}_{4}}\]: Conc. \[{{H}_{2}}S{{O}_{4}}\] acts as a dehydrating agent which removes water from the ethanol.

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10th Class Science Solved Paper - Science-2017 Outside Delhi Set-I

question_answer Write the structural formula of ethanol. What happens when it is heated with excess of conc. \[{{H}_{2}}S{{O}_{4}}\] at 443 K, ? Write the chemical equation or the reaction stating the role of cone. \[{{H}_{2}}S{{O}_{4}}\] in this reaction.

Write the structural formula of ethanol. What happens when it is heated with excess of conc. \[{{H}_{2}}S{{O}_{4}}\] at 443 K, ? Write the chemical equation or the reaction stating the role of cone. \[{{H}_{2}}S{{O}_{4}}\] in this reaction.