Esters

Q.

What happens when: (Write chemical reactions as well)
(i) A pinch of sodium hydrogen carbonate is added to ethanoic acid.
(ii) Ethanol is oxidised with acidified potassium dichromate.

Q. Which of the following are true about esters?

1. They have a sweet smell.
2. They are volatile.
3. They are used to make cough syrups.
4. They are used in preparation of soaps.

Q.

Distinguish between esterification and saponification reactions of organic compounds.

Q.

Identify the ester compound in the options given below.

1. $C{H}_{3}C{H}_{2}COOC{H}_3$

2. $C{H}_{3}C{H}_{2}COOH$

3. $C{H}_{3}C{H}_{2}COC{H}_2$

4. $C{H}_{3}OH$

Q. Question 8
In which of the following compounds $\text{-OH}$ is the functional group
(a) Butanone
(b) Butanol
(c) Butanoic acid
(d) Butanal

Q. ${\text{CH}}_3\text{COOH}\left(\mathrm{aq}\right)+{\text{CH}}_3{\text{CH}}_2\text{OH}\left(\mathrm{aq}\right)\underset{}{\overset{\text{Acid catalyst}}{\to }}$ ${\text{+ H}}_2\text{O}\left(\mathrm{aq}\right)$
This reaction is called .

1. saponification
2. esterification
3. $C{H}_{3}COOC{H}_3$
4. $C{H}_{3}COOC{H}_{2}C{H}_3$

Q. Question 7
How can ethanol and ethanoic acid be differentiated on the basis of their physical and chemical properties?

Q.

The compound $C{H}_{3}COO{C}_2{H}_5$ belongs to the family of carboxylic acid.

1. True

2. False

Q.

1. True
2. False

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.

The combination of which of the following compounds will give an ester?

1. Methanone and propanal

2. Methanal and propanol

3. Methanol and propanoic acid

4. Methanone and formic acid

Q. Upon reaction of ethanol with ethanoic acid in concentrated $H_{2}S{O}_4$, a compound of ___is produced.

1. Ester
2. Carboxylic acid
3. Alcohol
4. Aldehyde

Q. Vinegar is a compound obtained by combining hydrogen, carbon and ...............