Tag: some important carbon compounds

Questions Related to some important carbon compounds

Ethanol is:

chemistry carbon and its compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

  1. ionic compound

  2. noble gas

  3. polar covalent compound

  4. non-polar covalent compound

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Correct Option: C
Explanation:

Ethanol can be written as $CH _3-CH _2-OH$. The oxygen atom in the hydroxyl ($OH$) group is highly electronegative and hence attracts the electrons towards itself. Thus, ethanol is a polar compound with its electrons more towards the oxygen atom. Although ($C _2H _5$) group is non polar.

All the bonds in ethanol are covalent in nature. The bonds are formed by sharing of electrons between the atoms.
Thus, option $C$ is the correct answer.

Which of the following reagent reacts with ethanoic acid to liberate hydrogen gas?

chemistry carbon compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

  1. Na

  2. Zn

  3. Both A and B

  4. Cl

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Correct Option: C
Explanation:

Na or Zn reacts with ethanoic acid to liberate hydrogen gas.


$2CH _3COOH +2Na \rightarrow 2CH _3COONa + H _2$

Hence the correct option is C.

What is the action of the following reagents on ethanoic acid?

chemistry carbon compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

  1. $LiAl{H} _{4}/{H} _{3}{O}^{+}$

  2. $P{Cl} _{3}$, heat

  3. ${P} _{2}{O} _{5}$, heat

  4. None of the above

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Correct Option: A

Which method is used to get pure ethanol?

chemistry carbon and its compounds some important carbon compounds ethanol and ethanoic acid introduction to alcohols - ethanol

  1. Membrane technology

  2. Esterification

  3. Fermentation

  4. None of these

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Correct Option: D
Explanation:

In industrial method, to obtain 100% pure alcohol, a small quantity of benzene is added to rectified spirit and the mixture is then distilled. Absolute alcohol is obtained in third fraction that distills over at 78.2°C (351.3 K).

None of the given method is correct. 

Option D is the answer.