Soaps

Q. Describe the process of making soap in brief.

Q.

Why is the milk of magnesia used in antacids?

Q.

Which of these substances are soapy in touch?

1. Citric acid

2. Malic acid

3. Lime water

4. Ammonium hydroxide

Q. Consider the following two statements about soap and detergent –
(i) Soaps and detergents are salts of long chain fatty acids.
(ii) Both soap and detergent precipitate scum in hard water.
(iii) Soap is sodium or potassium salt of fatty acids whereas detergents are ammoniuma nd sulphonate salts of fatty acids.
Which of the above statements is (are) true?

1. (ii) and (iii)
2. (iii) and (i)
3. (i) and (ii)
4. All

Q.

Which of the following sets of materials can be used for conducting a saponification reaction for the preparation of soap.

1. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\mathrm{and}\mathrm{neem}\mathrm{oil}$

2. $\mathrm{NaOH}\mathrm{and}\mathrm{neem}\mathrm{oil}$

3. $\mathrm{NaOH}\mathrm{and}\mathrm{mineral}\mathrm{oil}$

4. $\mathrm{Ca}{\left(\mathrm{OH}\right)}_2\mathrm{and}\mathrm{mineral}\mathrm{oil}$

Q.

A detergent is a better cleansing agent as compared to soap.

1. True

2. False

Q. What is salting out of soap?

1. Formation of salt
2. Formation of acids in aqueous medium
3. Precipitation of soap in solid form
4. Melting if soap

Q. Is the salt found in Sea water also a derivative of a reaction between acids and bases ?

Q. What kind of salts are NaKSO4 and K(OH)Cl (acidic or basic) and why

Q.

The Soap molecule has a

1. Hydrophilic head and hydrophobic tail

2. Hydrophobic head and hydrophilic tail

3. Hydrophobic head and hydrophobic tail

4. Hydrophilic head and hydrophilic tail

Q. are used to treat indigestion.

1. Mild acids
2. Mild alkalis
3. Strong alkalis

Q.

Why is the milk of magnesia used in antacids?

Q.

There are two tubs full of water, A and B.
The water in tub A contains ${\text{MgCl}}_2$ salts in very low concentration. Tub B on the other hand contains ${\text{MgCl}}_2$ salts in high concentration. Clothes are washed using water from these tubs separately. The clothes washed using water from which of the two tubs will be cleaner?

1. A

2. B

3. Both will be equally clean

4. Neither would clean the clothes

Q. _________ is used as laundry soap.

1. Hard soap
2. Soft soap
3. Both $A$ and $B$
4. None of above

Q. In the soap micelles:

1. the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
2. ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster
3. both ionic and carbon chain are in the interior of the cluster
4. both ionic end and carbon chain are on the exterior of the cluster

Q.

In the soap micelles

1. The ionic soap is on the surface of the cluster while the carbon chains is in the interior of the cluster.

2. Both ionic end and carbon chain are in interior of the cluster

3. Both ionic end and carbon chain are on the exterior of the cluster

4. Ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster

Q. Why is soap referred as a salt?

1. They are long chain of fatty acids
2. Made up of various salts
3. Gives salt on acting with water
4. None of above

Q.

Hardness of water can be detected using:

1. 

2. Dilute

3. Scum formed by lathering soap

4. Zn-Cu couple

Q. Why is soap referred to as salt?

1. It does not contain hydroxide ions
2. All of above
3. It is prepared by reacting fatty acid with a strong base
4. It has water of crystallization

Q. Hardness of water can be detected using:

1. $N{a}_{2}C{O}_3$
2. Scum formed by lathering soap
3. Dilute $H_{2}S{O}_4$
4. Zn-Cu couple

Q.

Mentioned the difference between soap and detergents.

Q. Assertion (A): Hard water gives easy lather with soap.
Reason (R): Salts of calcium and magnesium react with soap to form insoluble salts.

1. (A) is correct but (R) is not correct.
2. (A) and (R) both are correct and (R) is the correct explanation of (A).
3. (A) and (R) both are correct but (R) is not the correct explanation of (A).
4. (A) is not correct but (R) is correct.

Q. Soaps are sodium or potassium salts of long chain ___ .

1. Fatty acids
2. sulphonates
3. aldehydes
4. ketones