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

 When ethanol react with sodium,which gas will produce?

  1. hydrogen

  2. oxygen

  3. sodium ethoxide

  4. carbon dioxide
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If a small piece of sodium is dropped into some ethanol, it reacts steadily to give off bubbles of hydrogen gas and leaves a colourless solution of sodium ethoxide, $CH _3CH _2ONa$ and hydrogen gas is evolved.

$2C _2H _5OH + 2Na \rightarrow 2C _2H _5ONa + H _2$ Option A is correct.

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

Vinegar is a :

  1. 5-8% solution of acetic acid in water

  2. 25-30% solution of acetic acid in water

  3. 40-45% solution of acetic acid in water

  4. 45-50% solution of acetic acid in water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vinegar is a liquid containing acetic acid and water. This acetic acid is produced by the fermentation of ethanol by acetic acid bacteria. It is mainly used as a cooking ingredient. It is a 5-8% solution of acetic acid in water and most easily available mild acid.

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

$ NaOH+{ C }{ H } _{ 3 }COOH\longrightarrow C{ H } _{ 3 }COONa+{ H } _{ 2 }O $

This reaction is called : 

  1. oxidation reaction

  2. hydrogention reaction

  3. neutralisation reaction

  4. addition reaction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Acid and Base reacts to form Salt and Water. This reaction is called neutralisation reaction. In this, acid is acetic acid and base is sodium hydroxide. Salt ($CH _3COONa$) is formed.

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

Proof is defined as _______ the percentage by volume of alcohol in ethanol-water mixture.

  1. twice

  2. thrice

  3. half

  4. four times
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
The term was originally used in the United Kingdom and was equal to about  7/4 times the alcohol by volume (ABV). The UK now uses the ABV standard instead of alcohol proof. In the United States, alcoholic proof is defined as twice the percentage of ABV.

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

The organic acid present in vinegar is :

  1. methanoic acid

  2. ethanoic acid

  3. propanoic acid

  4. none of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vinegar is also known as acetic acid and water. Acetic acid is ethanoic acid produced by the fermentation of ethanol by acetic acid bacteria. Vinegar is a cooking ingredient and commercially produced by fast or slow fermentation processes. 

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

Which of the following product is obtained during reaction of ethanoic acid with diazomethane in presence of $dil. HCl$?

  1. Methyl acetate

  2. Ethyl acetate

  3. Methyl formate

  4. Ethyl formate
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Methyl acetate is obtained during reaction of ethanoic acid with diazomethane in presence of dil HCl.
$CH _3COOH + CH _2N _2 \xrightarrow {dil HCl} CH _3COOCH _3 + N _2$

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

Which of the following product(s) is$/$are obtained during the reaction of ethanoic acid with chlorine?

  1. Monochloroacetic acid

  2. Dichloroacetic acid

  3. Trichloroacetic acid

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When ethanoic acid reacts with chlorine in the presence of acetic anhydride as catalyst it forms chloroacetic acid.

$CH _3COOH  + Cl _2 \rightarrow ClCH _2COOH + HCl$