Ethanol and its Properties

Q.

What happens when the vapour of ethanol is passed over heated copper catalyst at 573 K?

1. Acetone will be formed.

2. Ethyl ethanoate will be formed.

3. Acetaldehyde will be formed.

4. Ehanoic acid will be formed.

Q. Saponification reaction involves the formation of and ethanol, when ethyl ethanoate reacts with sodium hydroxide.

1. sodium carboxylate
2. ether
3. aldehyde

Q. When ethanol is heated with excess of concentrated sulphuric acid at $170{}^o\text{C}$, it gets converted to ethene. In this reaction, concentrated sulphuric acid acts as:

1. Oxidising agent
2. Catalyst
3. Dehydrating agent
4. Reducing agent

Q.

$100\%$ pure ethanol is called ………....
(denatured alcohol, absolute alcohol, spurious alcohol)

Q. According to Tanu, all acids and esters are corrosive.
Manu thinks some acids are corrosive but esters are not.
Which of the following options is correct?

1. Tanu is correct but Manu is wrong
2. Tanu is wrong but Manu is correct
3. Both are correct
4. Both are wrong

Q. To prevent the misuse of important commercial solvent ethanol, it is mixed with _________.

1. ethanoic acid
2. methanol
3. propane
4. propanol

Q. Heating ethanol with excess concentrated sulphuric acid gives ______.

1. butane
2. ethene
3. propyne
4. methane

Q. A dehydration reaction is a reaction in which there is _______ .

1. an addition of water
2. a loss of water
3. an addition of hydrogen
4. a loss of hydrogen

Q. Methanol is safe to be used for drinking purpose.

1. True
2. False

Q. Identify X in the given reaction.
${\text{CH}}_3{\text{CH}}_2\text{OH}\text{(aq)}\stackrel{\text{X}}{\to }{\text{CH}}_2={\text{CH}}_2\text{(g)}+{\text{H}}_2\text{O(l)}$

1. Alkaline ${\text{KMnO}}_4$
2. Acidified ${\text{KMnO}}_4$
3. Dilute ${\text{H}}_2{\text{SO}}_4$
4. Concentrated ${\text{H}}_2{\text{SO}}_4$

Q. Which of the following is added to denature ethanol?

1. Methanol
2. Propanol
3. Methanal
4. Propanal

Q. Identify the balanced chemical reaction of sodium with ethanol.

1. $2\mathrm{Na}+2{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\to 2{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{ONa}+H_2$
2. $2\mathrm{Na}+{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\to 2{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Na}+H_{2}O$
3. $2\mathrm{Na}+{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\to 2{\mathrm{CH}}_3\mathrm{CHO}+2\mathrm{NaH}$
4. $2\mathrm{Na}+{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}\to {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{ONa}+H_2$

Q. Analyze the reaction given above and identify 'X' from the following options.
${\text{CH}}_3{\text{CH}}_2\text{OH(aq)}+\text{X}\stackrel{\text{acid}}{\to }{\text{CH}}_3{\text{CH}}_2{\text{COOCH}}_2{\text{CH}}_3\text{(aq)}+{\text{H}}_2\text{O}\text{(aq)}$

1. ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{COOH}$
2. ${\text{CH}}_3{\text{CH}}_2\text{COOH}$
3. ${\text{CH}}_3{\text{CH}}_2\text{OH}$
4. ${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2\text{OH}$

Q. Which one of the following is used as anti-bacterial agent?

1. Ethanoic acid
2. Ethanol
3. Ethane
4. Ethyne

Q. Ethanol on complete oxidation gives __________.

1. carbon dioxide
2. acetaldehyde
3. acetic acid
4. acetone

Q. Heating ethanol with excess concentrated sulphuric acid gives ______.

1. butane
2. ethene
3. propyne
4. methane