Q: \$CH_{3} CH_{2} OH \xrightarrow{Alkaline\ KMnO_4 + Heat}CH_{3} COOH\$In the above given reaction, alkaline \$KMnO_{4}\$ acts as:

In the given reaction; \$CH_{3}CH_{2}OH \xrightarrow[heat]{alkaline\ KMnO_{4}} CH_{3}COOH\$ Alkaline \$KMnO_{4}\$ acts as an oxidising agent as it oxidises ethanol (alcohol) to form ethanoic acid (an acid).

Q: In the presence of concentrated sulphuric acid \$(H_2SO_4)\$, acetic acid reacts with ethyl alcohol to produce :

\$ { CH }_{ 3 }COOH \$ + \$ { CH }_{ 3 }{ CH }_{ 2 }OH \$ \$ \underrightarrow { Conc{ H }_{ 2 }{ SO }_{ 4 } }\$ \$ { CH }_{ 3 }COO{ C }_{ 2 }{ H }_{ 5 } +{ H }_{ 2 }{ O }\$During esterification, oxygen of alcohol is found in main product that is nothing but ester. This indicates that H of alcohol is eliminated as water molecule.

Q: Draw the structure for ethanoic acid molecule.

\$H - \underset {\underset {H}{|}}{\overset {\overset {H}{|}}{C}} - \overset {\overset {O}{\parallel}}{C} - O - H\$The structure for ethanoic acid is shown above.The functional group is acid.

Q: During decarboxylation of ethanoic acid with soda lime \$(NaOH+CaO), \ CO_2\$ is removed as :

\$\underset{sodium \, ethanoate}{CH_3 - COONa} \xrightarrow[\Delta]{Soda-lime (mixture \, of \, NaOH \, and \, CaO \,in \, 3 : 1 \, ratio)} \underset{Methane}{CH_4} + Na_2CO_3\$

Question 1

$CH_{3} CH_{2} OH \xrightarrow{Alkaline\ KMnO_4 + Heat}CH_{3}  COOH$In the above given reaction, alkaline $KMnO_{4}$ acts as:

Accepted Answer

In the given reaction; $CH_{3}CH_{2}OH \xrightarrow[heat]{alkaline\ KMnO_{4}} CH_{3}COOH$ Alkaline $KMnO_{4}$ acts as an oxidising agent as it oxidises ethanol (alcohol) to form ethanoic acid (an acid).

Question 2

In the presence of concentrated sulphuric acid  $(H_2SO_4)$, acetic acid reacts with ethyl alcohol to produce :

Accepted Answer

$ { CH }_{ 3 }COOH  $                +    $  { CH }_{ 3 }{ CH }_{ 2 }OH $                       $ \underrightarrow { Conc{ H }_{ 2 }{ SO }_{ 4 } }$     $ { CH }_{ 3 }COO{ C }_{ 2 }{ H }_{ 5 } +{ H }_{ 2 }{ O }$During esterification, oxygen of alcohol is found in main product that is nothing but ester. This indicates that H of alcohol is eliminated as water molecule.

Question 3

$ NaHC{ O }_{ 3 }+C{ H }_{ 3 }COOH\longrightarrow C{ H }_{ 3 }COONa+C{ O }_{ 2 }+{ H }_{ 2 }O $,This reaction is used as a test of carboxylic acid because :

Accepted Answer

Sodium hydrogen carbonate is also known as sodium bicarbonate and it reacts with acetic acid to give sodium acetate and carbon dioxide gas is evolved as this gas is confirmed when it turns lime water milky. So, it is a confirmatory test for carboxylic acids.

Question 4

Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated $H_{2}SO_{4}.$

Accepted Answer

Reaction of ethanol with warm ethanoic acid to form ethyl acetate (an ester) and water can be written as:$ C_{2}H_{5}OH +  CH_{3}COOH  \overset{H^{+}}{\rightarrow}   CH_{3}COOC_{2}H_{5}  +  H_{2}O$(ethanol)      (ethanoic acid)             (ester)The above reaction is an esterification reaction as alcohol and an acid are combined to form an ester.

Question 5

Draw the structure for ethanoic acid molecule.

Accepted Answer

$H - \underset {\underset {H}{|}}{\overset {\overset {H}{|}}{C}} - \overset {\overset {O}{\parallel}}{C} - O - H$The structure for ethanoic acid is shown above.The functional group is acid.

Question 6

Ethanol reacts with sodium and forms two products. These are:

Accepted Answer

The equation for the reaction between sodium and ethanol can be written as:$2CH_{3}CH_{2}OH + 2Na \rightarrow 2CH_{3}CH_{2}ONa + H_{2}$Therefore, the products formed are sodium ethoxide and hydrogen.Hence, option C is correct.

Question 7

Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

Accepted Answer

Acetic acid gives a pleasent smell on reaction with ethanol due to the formation of ethyl acetate as :$CH_{3}COOH + C_{2}H_{5}OH \rightarrow CH_{3}COOC_{2}H_{5} + H_{2}O$

Question 8

During decarboxylation of ethanoic acid with soda lime $(NaOH+CaO), \ CO_2$ is removed as :

Accepted Answer

$\underset{sodium \, ethanoate}{CH_3 - COONa} \xrightarrow[\Delta]{Soda-lime (mixture \, of \, NaOH \, and \, CaO \,in \, 3 : 1 \, ratio)} \underset{Methane}{CH_4} + Na_2CO_3$

Question 9

Write chemical equation of the reaction of ethanoic acid with sodium hydroxide.

Accepted Answer

Ethanoic acid is commonly known as acetic acid. The balanced chemical reaction between ethanoic acid and sodium metal is shown below.$ CH_{3}COOH +  NaOH\rightarrow \underset{sodium \ ethanoate}{CH_{3}COONa}+H_{2}O $Here, ethanoic acid reacts with base sodium hydroxide to form sodium ethanoate salt and water.

Question 10

Why is pure ethanoic acid called glacial ethanoic acid (or glacial acetic acid) ?

Accepted Answer

The melting point of pure ethanoic acid is 290 K and hence it often freezes in cold climates and forms a colourless, ice-like liquid. This property has given it the name glacial acetic acid.

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$C H_{3} C H_{2} O H A l k a l i n e K M n O_{4} + H e a t C H_{3} C O O H$

In the above given reaction, alkaline $K M n O_{4}$ acts as:

In the presence of concentrated sulphuric acid $(H_{2} S O_{4})$ , acetic acid reacts with ethyl alcohol to produce :

$N a H C O_{3} + C H_{3} C O O H ⟶ C H_{3} C O O N a + C O_{2} + H_{2} O$ ,
This reaction is used as a test of carboxylic acid because :

Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated $H_{2} S O_{4} .$

Draw the structure for ethanoic acid molecule.

Ethanol reacts with sodium and forms two products. These are:

Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

During decarboxylation of ethanoic acid with soda lime $(N a O H + C a O), C O_{2}$ is removed as :

Write chemical equation of the reaction of ethanoic acid with sodium hydroxide.

Why is pure ethanoic acid called glacial ethanoic acid (or glacial acetic acid) ?

Revise with Concepts

More About Ethanol

Ethanoic Acid - Reaction with Base and Basic Salts

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CH3​CH2​OHAlkaline KMnO4​+Heat​CH3​COOH In the above given reaction, alkaline KMnO4​ acts as:

In the presence of concentrated sulphuric acid (H2​SO4​), acetic acid reacts with ethyl alcohol to produce :

NaHCO3​+CH3​COOH⟶CH3​COONa+CO2​+H2​O,This reaction is used as a test of carboxylic acid because :

Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H2​SO4​.

Draw the structure for ethanoic acid molecule.

Ethanol reacts with sodium and forms two products. These are:

Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?

During decarboxylation of ethanoic acid with soda lime (NaOH+CaO), CO2​ is removed as :

Write chemical equation of the reaction of ethanoic acid with sodium hydroxide.

Why is pure ethanoic acid called glacial ethanoic acid (or glacial acetic acid) ?

$C H_{3} C H_{2} O H A l k a l i n e K M n O_{4} + H e a t C H_{3} C O O H$

In the above given reaction, alkaline $K M n O_{4}$ acts as:

In the presence of concentrated sulphuric acid $(H_{2} S O_{4})$ , acetic acid reacts with ethyl alcohol to produce :

$N a H C O_{3} + C H_{3} C O O H ⟶ C H_{3} C O O N a + C O_{2} + H_{2} O$ ,
This reaction is used as a test of carboxylic acid because :

Name the type of reaction when ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated $H_{2} S O_{4} .$

During decarboxylation of ethanoic acid with soda lime $(N a O H + C a O), C O_{2}$ is removed as :