320755
Which of the following forms cationic micelles above certain concentration?
1 Sodium ethyl sulphate
2 Sodium acetate
3 Urea
4 Cetyltrimethylammonium bromide
Explanation:
Sodium acetate forms cationic micelles above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\(\left(-\mathrm{COO}^{-}\right)\)at one end and on other end it has \(\mathrm{Na}^{+}\)ions, thus cationic micelle is formed.
CHXII05:SURFACE CHEMISTRY
320756
A substance which forms in micelles in the solution contains
1 Carboxylic group
2 Alkyl groups
3 Water insoluble long hydrocarbon groups and water soluble polar group
4 Water soluble hydrocarbon group and water insoluble polar group
Explanation:
A substance which forms micelles solution contains water insoluble long hydrocarbon groups and water soluble polar group.
CHXII05:SURFACE CHEMISTRY
320757
Critical Micelle concentration for a soap solution is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Micelle formation is possible only when the concentration of soap solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is
1 \(2.0 \times 10^{-3}\)
2 \(4.6 \times 10^{-5}\)
3 \(7.5 \times 10^{-5}\)
4 \(1.1 \times 10^{-4}\)
Explanation:
Micelles formation takes place above the critical micelle concentration which is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\) (given). Therefore, micelle formation is possible only when the concentration of soap solution will be \(2.0 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\)
KCET - 2019
CHXII05:SURFACE CHEMISTRY
320758
Assertion : Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). Reason : The conductivity of a solution having sufficient molecules decreases sharply at the CMC.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The formation micelles takes place above CMC. Hence Assertion is true. Each micelle contains 100 molecules. Hence, conductivity of the solution decreases sharply at the CMC. Hence Reason is also true but it is not the correct explanation of Assertion.
CHXII05:SURFACE CHEMISTRY
320759
Which of the following detergents will be biodegradable?
320755
Which of the following forms cationic micelles above certain concentration?
1 Sodium ethyl sulphate
2 Sodium acetate
3 Urea
4 Cetyltrimethylammonium bromide
Explanation:
Sodium acetate forms cationic micelles above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\(\left(-\mathrm{COO}^{-}\right)\)at one end and on other end it has \(\mathrm{Na}^{+}\)ions, thus cationic micelle is formed.
CHXII05:SURFACE CHEMISTRY
320756
A substance which forms in micelles in the solution contains
1 Carboxylic group
2 Alkyl groups
3 Water insoluble long hydrocarbon groups and water soluble polar group
4 Water soluble hydrocarbon group and water insoluble polar group
Explanation:
A substance which forms micelles solution contains water insoluble long hydrocarbon groups and water soluble polar group.
CHXII05:SURFACE CHEMISTRY
320757
Critical Micelle concentration for a soap solution is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Micelle formation is possible only when the concentration of soap solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is
1 \(2.0 \times 10^{-3}\)
2 \(4.6 \times 10^{-5}\)
3 \(7.5 \times 10^{-5}\)
4 \(1.1 \times 10^{-4}\)
Explanation:
Micelles formation takes place above the critical micelle concentration which is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\) (given). Therefore, micelle formation is possible only when the concentration of soap solution will be \(2.0 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\)
KCET - 2019
CHXII05:SURFACE CHEMISTRY
320758
Assertion : Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). Reason : The conductivity of a solution having sufficient molecules decreases sharply at the CMC.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The formation micelles takes place above CMC. Hence Assertion is true. Each micelle contains 100 molecules. Hence, conductivity of the solution decreases sharply at the CMC. Hence Reason is also true but it is not the correct explanation of Assertion.
CHXII05:SURFACE CHEMISTRY
320759
Which of the following detergents will be biodegradable?
NEET Test Series from KOTA - 10 Papers In MS WORD
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CHXII05:SURFACE CHEMISTRY
320755
Which of the following forms cationic micelles above certain concentration?
1 Sodium ethyl sulphate
2 Sodium acetate
3 Urea
4 Cetyltrimethylammonium bromide
Explanation:
Sodium acetate forms cationic micelles above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\(\left(-\mathrm{COO}^{-}\right)\)at one end and on other end it has \(\mathrm{Na}^{+}\)ions, thus cationic micelle is formed.
CHXII05:SURFACE CHEMISTRY
320756
A substance which forms in micelles in the solution contains
1 Carboxylic group
2 Alkyl groups
3 Water insoluble long hydrocarbon groups and water soluble polar group
4 Water soluble hydrocarbon group and water insoluble polar group
Explanation:
A substance which forms micelles solution contains water insoluble long hydrocarbon groups and water soluble polar group.
CHXII05:SURFACE CHEMISTRY
320757
Critical Micelle concentration for a soap solution is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Micelle formation is possible only when the concentration of soap solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is
1 \(2.0 \times 10^{-3}\)
2 \(4.6 \times 10^{-5}\)
3 \(7.5 \times 10^{-5}\)
4 \(1.1 \times 10^{-4}\)
Explanation:
Micelles formation takes place above the critical micelle concentration which is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\) (given). Therefore, micelle formation is possible only when the concentration of soap solution will be \(2.0 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\)
KCET - 2019
CHXII05:SURFACE CHEMISTRY
320758
Assertion : Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). Reason : The conductivity of a solution having sufficient molecules decreases sharply at the CMC.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The formation micelles takes place above CMC. Hence Assertion is true. Each micelle contains 100 molecules. Hence, conductivity of the solution decreases sharply at the CMC. Hence Reason is also true but it is not the correct explanation of Assertion.
CHXII05:SURFACE CHEMISTRY
320759
Which of the following detergents will be biodegradable?
320755
Which of the following forms cationic micelles above certain concentration?
1 Sodium ethyl sulphate
2 Sodium acetate
3 Urea
4 Cetyltrimethylammonium bromide
Explanation:
Sodium acetate forms cationic micelles above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\(\left(-\mathrm{COO}^{-}\right)\)at one end and on other end it has \(\mathrm{Na}^{+}\)ions, thus cationic micelle is formed.
CHXII05:SURFACE CHEMISTRY
320756
A substance which forms in micelles in the solution contains
1 Carboxylic group
2 Alkyl groups
3 Water insoluble long hydrocarbon groups and water soluble polar group
4 Water soluble hydrocarbon group and water insoluble polar group
Explanation:
A substance which forms micelles solution contains water insoluble long hydrocarbon groups and water soluble polar group.
CHXII05:SURFACE CHEMISTRY
320757
Critical Micelle concentration for a soap solution is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Micelle formation is possible only when the concentration of soap solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is
1 \(2.0 \times 10^{-3}\)
2 \(4.6 \times 10^{-5}\)
3 \(7.5 \times 10^{-5}\)
4 \(1.1 \times 10^{-4}\)
Explanation:
Micelles formation takes place above the critical micelle concentration which is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\) (given). Therefore, micelle formation is possible only when the concentration of soap solution will be \(2.0 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\)
KCET - 2019
CHXII05:SURFACE CHEMISTRY
320758
Assertion : Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). Reason : The conductivity of a solution having sufficient molecules decreases sharply at the CMC.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The formation micelles takes place above CMC. Hence Assertion is true. Each micelle contains 100 molecules. Hence, conductivity of the solution decreases sharply at the CMC. Hence Reason is also true but it is not the correct explanation of Assertion.
CHXII05:SURFACE CHEMISTRY
320759
Which of the following detergents will be biodegradable?
320755
Which of the following forms cationic micelles above certain concentration?
1 Sodium ethyl sulphate
2 Sodium acetate
3 Urea
4 Cetyltrimethylammonium bromide
Explanation:
Sodium acetate forms cationic micelles above a certain concentration. In the molecule of detergents and soap, the negative ions aggregate to form a micelle of colloidal size. In polar medium (like water), the negative ion has a long hydrocarbon chain and a polar group\(\left(-\mathrm{COO}^{-}\right)\)at one end and on other end it has \(\mathrm{Na}^{+}\)ions, thus cationic micelle is formed.
CHXII05:SURFACE CHEMISTRY
320756
A substance which forms in micelles in the solution contains
1 Carboxylic group
2 Alkyl groups
3 Water insoluble long hydrocarbon groups and water soluble polar group
4 Water soluble hydrocarbon group and water insoluble polar group
Explanation:
A substance which forms micelles solution contains water insoluble long hydrocarbon groups and water soluble polar group.
CHXII05:SURFACE CHEMISTRY
320757
Critical Micelle concentration for a soap solution is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\). Micelle formation is possible only when the concentration of soap solution in \(\mathrm{mol} \mathrm{L}^{-1}\) is
1 \(2.0 \times 10^{-3}\)
2 \(4.6 \times 10^{-5}\)
3 \(7.5 \times 10^{-5}\)
4 \(1.1 \times 10^{-4}\)
Explanation:
Micelles formation takes place above the critical micelle concentration which is \(1.5 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1}\) (given). Therefore, micelle formation is possible only when the concentration of soap solution will be \(2.0 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1}\)
KCET - 2019
CHXII05:SURFACE CHEMISTRY
320758
Assertion : Micelles are formed by surfactant molecules above the critical micellar concentration (CMC). Reason : The conductivity of a solution having sufficient molecules decreases sharply at the CMC.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The formation micelles takes place above CMC. Hence Assertion is true. Each micelle contains 100 molecules. Hence, conductivity of the solution decreases sharply at the CMC. Hence Reason is also true but it is not the correct explanation of Assertion.
CHXII05:SURFACE CHEMISTRY
320759
Which of the following detergents will be biodegradable?