Tag: carbon and its compounds

Quizzes (9) Questions (4)

Questions Related to carbon and its compounds

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

Which out of the following has smell similar to that of vinegar?

  1. Methanol

  2. Ethanol

  3. Ethanoic acid

  4. Formic acid
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vinegar is a liquid having acetic acid and water as its mixture. So, ethanoic acid is the other name of acetic acid and this smell of vinegar is similar to ethanoic acid. 

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

Ethanol is:

  1. ionic compound

  2. noble gas

  3. polar covalent compound

  4. non-polar covalent compound
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

Which method is used to get pure ethanol?

  1. Membrane technology

  2. Esterification

  3. Fermentation

  4. None of these
Reveal answer Fill a bubble to check yourself
D Correct answer
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.