Esterification and Saponification Reaction

Q.

Explain the different factors influencing the rate of chemical reaction.

Q. In the preparation of an ester, the commonly used dehydrating agent is _________.

1. anhydrous calcium carbide
2. concentrated sulphuric acid
3. anhydrous aluminium chloride
4. phosphorus pentoxide

Q. What are the physical and chemical properties of ethanoic acid?

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.

Soaps are manufactured by the process of ________ of oils and fats.

Q.

Which of the following organic compounds are used in the manufacture of synthetic dyes?

1. Aniline

2. Benzene

3. Phenol

4. Indigo

Q. what gas is evolved if ch3cooh reacts with washing soda

Q. If 25ml of a sulphuric acid solution reacts completely with 1.06 g of pure sodium carbonate, what is the normality of this acid solution?

Q. How do you appreciate the role of esters in everyday life?

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. Vinay was trying to create Sodium acetate, he added ethanoic acid and 'A' in an open vessel to concentrated H2SO4 and was surprised when the solution gave a sweet effervescence. So he started again in a closed vessel and obtained ethyl acetate. Then he added 'B' and create Sodium acetate. Find a and b

Q.

50. What is the formula of Plaster of Paris?

Q. Oils and Fats are the ............................ of glycerol with fatty acids.

1. triesters
2. esters
3. couplers
4. none of these

Q. Perfumes are made from:

1. ester
2. carboxylic acids
3. methanol
4. all of the above

Q.

What is soft water?

Q. An organic compounds 'A' of molecular formula $C_2{H}_{6}O$ on oxidation with dilute alkaline $KMn{O}_4$ solution gives an acid 'B' with the same number of carbon atoms. Compound "A' often used for sterilisation of skin by doctors.
Name the compounds 'A' and 'B'

Q. The hydrolysis of an ester in presence of an alkali is known as saponification.

1. True
2. False

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

1. sodium carboxylate
2. ether
3. aldehyde

Q. Esters of which acid is used in perfumery?

1. Methanoic acid
2. Ethanoic acid
3. Hexanedioic acid
4. Benzoic acid

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

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

Q. Assign A, B, C, D from given type of reactions.
A for precipitate formation reaction.
B for precipitate dissolution reaction.
C for precipitate exchange reaction.
D for no reaction.
$Ca{C}_2{O}_4\downarrow +C{H}_{3}COOH⟶Noreaction$

Q. Two moles of an equimolar mixture of two alcohols $R_1-OH$ and $R_2-OH$ are esterified with one mole of acetic acid, If only 80% of the acid is consumed till equilibrium and the quantities of ester formed under equilibrium are in the ratio 3:2 what is the value of the equilibrium constant for the esterification of $R_1-OH?$

1. 0.48
2. 2.2
3. 0.32
4. 0.75

Q. 12. Out of the following groups, choose the one which should be introduced in a dye or a drug to make it water soluble A) SO3H B) NO2 C) CH3 D) Cl

Q. A salt X is formed and gas is evolved when ethanoic acid reacts with sodium hydrogen-carbonate. Name the salt X.

Q. Assign A, B, C, D from given type of reactions.
A for precipitate formation reaction.
B for precipitate dissolution reaction.
C for precipitate exchange reaction.
D for no reaction.
$MCr{O}_4\downarrow (M^{2+}=B{a}^{2+}P{b}^{2+})+AcOH⟶Nodissolution$

Q. Assign A, B, C, D from given type of reactions.
A for precipitate formation reaction.
B for precipitate dissolution reaction.
C for precipitate exchange reaction.
D for no reaction.
$C{H}_{3}COOAg\downarrow +HN{O}_3⟶Ag(NO{)}_3+C{H}_{3}COOH$

Q. Which of the following pair of compounds on reactions form a substance having a fruity smell?

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

Q. An organic compounds 'A' of molecular formula $C_2{H}_{6}O$ on oxidation with dilute alkaline $KMn{O}_4$ solution gives an acid 'B' with the same number of carbon atoms. Compound "A' often used for sterilisation of skin by doctors.
Name the compounds 'A' and 'B'

Q. In the preparation of an ester, the commonly used dehydrating agent is _________.

1. phosphorus pentoxide
2. anhydrous aluminium chloride
3. anhydrous calcium carbide
4. concentrated sulphuric acid