[2 Mark Question Answer]

Question 12 Marks

A neutral compoundX of molecular formula $C_2H_60$ on oxidation with
acidified potassium dichromate gives a compound Y .Compound Xreact
with Yon warming in presence of conc.$H_2S0_4 $ to give a sweet smelling
substance Z. What are X,Y, andZ? Give equations of the reaction
involved.

Answer

X = Ethyl alchohol
Y = Ethanoic acid
Z = Ethyl ethanoate

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Question 22 Marks

How will you carry out the following conversions:
(i) Ethanol to ethene
(ii) Bromoethane to ethanol

Answer

(i) Ethanol to ethene:
$
C _2 H _5 OH \xrightarrow[170^{\circ} C ]{\text { conc } \cdot H _2 SO _4} CH _2= CH _2+ H _{20}
$
(ii) Bromoethane to ethanol:
$
C _2 H _5 Br + KOH ( aq ) \longrightarrow C _2 H _5 OH + KBr
$

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Question 32 Marks

Give three uses of ethanol

Answer

Uses of ethanol:\
(i) In the manufacture of alcoholic beverages
(ii) As a solvent for paint, oils, perfumes
(iii) As an antifreeze in automobile radiators

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Question 42 Marks

Write the rnolecular formula and structural forrnula of ethanol.

Answer

Molecular formula of Ethanol: $C_2H_5OH :$
Structural formula of Ethanol:
$\begin{array}{cc}
\phantom{.....}\ce{H}\phantom{...}\ce{H}\phantom{........}\\
\phantom{.}|\phantom{...} \phantom{.}|\phantom{....}\\
\ce{H-C-C-O-H}\\
\phantom{.}|\phantom{...} \phantom{.}|\phantom{....}\\
\phantom{.....}\ce{H}\phantom{...}\ce{H}\phantom{........}\\
\end{array}$

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Chemistry [2 Mark Question Answer]

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