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Q. No.The salient feature of biodegradable polymer is:
1. Polymer that can be decomposed.
2. Polymer that cannot be decomposed.
3. Polymer that can be denatured.
4. Polymer that cannot be denatured.
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
87%
From NCERT
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The purpose of vulcanization of rubber is/are -
1. To maintain the elasticity of natural rubber.
2. To improve the tensile strength of natural rubber.
3. To use for a wide range of temperatures.
4. All of the above.
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
90%
From NCERT
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The presence of double bonds in rubber molecules increase -
1. Viscosity
2. Elasticity
3. Surface Tension
4. Vapour pressure
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
68%
From NCERT
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The set of monomers that forms a biodegradable polymer is:
1. H2N-CH2-COOH and H2N-(CH2)5-COOH
2. HO-CH2-CH2-OH and HOOC-C6H4-COOH
3. C6H5-CH=CH2 and CH2=CH-CH=CH2
4. CH2=CH-CN and CH2=CH-CH=CH2
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
71%
From NCERT
AIPMT - 2012
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Select the correct option based on statements below:
| Assertion (A): | Polytetrafluoroethylene is used in making non-stick cookware. |
| Reason (R): | Fluorine has the highest electronegativity. |
| 1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
Subtopic: Application of Polymers |
67%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Network polymers are thermosetting. |
| Reason (R): | Network polymers have a high molecular mass. |
| 1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
63%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | For making rubber synthetically, isoprene molecules are polymerized. |
| Reason (R): | Neoprene (a polymer of chloroprene) is a synthetic rubber. |
| 1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | (A) is false but (R) is true. |
| 4. | (A) is true but (R) is false. |
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Polyamides are best used as fibers because of their high tensile strength. |
| Reason (R): | Strong intermolecular forces (like hydrogen bonding within polyamides) lead to close packing of chains and increase the crystalline character. |
| 1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
57%
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Olefinic monomers undergo addition polymerization. |
| Reason (R): | Polymerisation of vinyl chloride is initiated by peroxides/persulphates. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Classification - Methods of Polymerization & Copolymerization |
From NCERT
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Select the correct option based on statements below:
| Assertion (A): | Most of synthetic polymers are not biodegradable. |
| Reason (R): | The polymerization process induces toxic character in organic molecules. |
| 1. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 2. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 3. | Both (A) and (R) are false. |
| 4. | (A) is true but (R) is false. |
Subtopic: Polymers: Natural & Synthetic, Biodegradable & Non Biodegradable |
From NCERT
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