Tag: carbon compounds

Questions Related to carbon compounds

Give the balance equation for the following laboratory preparation :

Ethane from sodium propionate

  1. $CH _3CH _2COONa + NaOH \rightarrow C _2H _6 + Na _2CO _3$

  2. $CH _3CH _2COONa + 2NaOH \rightarrow C _2H _4 + Na _2CO _3$

  3. $CH _3CH _2COONa + NaOH \rightarrow C _2H _4 + Na _2CO _3$

  4. $CH _3CH _2COONa + 2NaOH \rightarrow 2CH _4 + Na _2CO _3$


Correct Option: A
Explanation:

Reaction:
$CH _3CH _2COONa + NaOH \rightarrow C _2H _6 + Na _2CO _3$

According to this reaction, ethanol is :
2C$ _2$H$ _5$OH + 2Na -----> 2C$ _2$H$ _5$ONa + H$ _2$

  1. Acidic in nature

  2. Basic in anture

  3. Amphoteric

  4. Neutral


Correct Option: A
Explanation:

As ethanol has donated $H^{+}$ it suggests that it has acidic nature. Acid is defined as the substance which has replaceable $H^{+}$ions. In the products side, it has donated and became the reason for the formation of hydrogen molecule. Hence, option A is the correct answer. 

 When ethanol react with sodium,which gas will produce?

  1. hydrogen

  2. oxygen

  3. sodium ethoxide

  4. carbon dioxide


Correct Option: A
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.

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


Correct Option: A
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.

$ N{ a } _{ 2 }C{ O } _{ 3 }+2C{ H } _{ 3 }COOH\longrightarrow $ 

Which gas is produced in this reaction?

  1. ${ H } _{ 2 }O $

  2. $CO _2$

  3. $CO$

  4. $H _2$


Correct Option: B

$ 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


Correct Option: C
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.

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

  1. twice

  2. thrice

  3. half

  4. four times


Correct Option: A
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.

Which of the following will react with sodium metal?

  1. Ethanol

  2. Ethanal

  3. Ethene

  4. Ethane


Correct Option: A
Explanation:

$2CH _3CH _2OH + 2Na\longrightarrow 2CH _3CH _2ONa + H _2$
$2H _2O + 2Na\longrightarrow 2NaOH + H _2$

The organic acid present in vinegar is :

  1. methanoic acid

  2. ethanoic acid

  3. propanoic acid

  4. none of these


Correct Option: B
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. 

Acetic acid is:

  1. Methanoic acid

  2. Ethanoic acid

  3. Propanoic acid

  4. None of these


Correct Option: B
Explanation:

Acetic acid is Ethanoic acid $CH _3COOH$. It is also called vinegar.