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(A) : Natural rubber and gutta percha ar...

(A) : Natural rubber and gutta percha are examples of cis-trans isomers.
(R) : Cis-trans isomerism arises due to the difference of geometrical arrangement of two different groups on the double bonded carbon atoms. 

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the correct explanation of (A)

C

(A) is true but (R) is false

D

Both (A) and (R) are false

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The correct Answer is:
A
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Chain isomerism arises due to difference in the arrangement of carbon atoms constituting the chain

(A) : Natural rubber is a polymer of cis-isoprene (R) : Poly trans isoprene is called Gutta-percha

Position isomerism is due to the difference in the position of a functional group, multiple bond or substituent in the same carbon chain

Geometrical isomerism arises due to restricted rotation about carbon-carbon or carbon-nitrogen double bond

The necessary condition for a molecule to exhibit optical isomerism is dissymmetry or chiral. Thus all organic compounds which contain one as symetric carbon atom are chiral and exist in two stereoisomers. Although the two forms have the same structure, they have different arrangements of groups about the as symmetric carbon. In fact, they represent as symetric molecules. They do not have a plane of symmetry. They are related to each other as an object to its mirror image and are non superimposable. The two structures actually stand for dextro or (+) and leavo or (-) isomers. Since they are related each other as mirror images, they are commonly called enantiomers. Which of the following statements is correct regarding compounds I to III

The necessary condition for a molecule to exhibit optical isomerism is dissymmetry or chiral. Thus all organic compounds which contain one assymetric carbon atom are chiral and exist in two stereoisomers. Although the two forms have the same structure, they have different arrangements of groups about the assymmetric carbon. In fact, they represent assymetric molecules. They do not have a plane of symmetry. They are related to each other as an object to its miror image and are non superimposable. The two structures actually stand for dextro or (+) and leavo or (-) isomers. Since they are related each other as mirror images, they are commonly called enantiomers. Which of the following compounds is optically inactive

The necessary condition for a molecule to exhibit optical isomerism is dissymmetry or chiral. Thus all organic compounds which contain one as symetric carbon atom are chiral and exist in two stereoisomers. Although the two forms have the same structure, they have different arrangements of groups about the as symmetric carbon. In fact, they represent as symetric molecules. They do not have a plane of symmetry. They are related to each other as an object to its mirror image and are non superimposable. The two structures actually stand for dextro or (+) and leavo or (-) isomers. Since they are related each other as mirror images, they are commonly called enantiomers. Consider the following structures A,B,C,D Which of the following statements is not correct

The necessary condition for a molecule to exhibit optical isomerism is dissymmetry or chiral. Thus all organic compounds which contain one assymetric carbon atom are chiral and exist in two stereoisomers. Although the two forms have the same structure, they have different arrangements of groups about the assymmetric carbon. In fact, they represent assymetric molecules. They do not have a plane of symmetry. They are related to each other as an object to its miror image and are non superimposable. The two structures actually stand for dextro or (+) and leavo or (-) isomers. Since they are related each other as mirror images, they are commonly called enantiomers. Consider the following structers A,B,C,D Which of the following statements is not correctConsider the following structers A,B,C,D Which of the following statements is not correct

AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. (A): F(2)C=CF(2), is the monomer of teflon. (R): Polytetrafluoroethy...

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  2. (A): The chains of nylon-6, 6 are held by hydrogen bonding forces. (...

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  3. (A) : Natural rubber and gutta percha are examples of cis-trans isomer...

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  4. (A): Styrene is more reactive than propylene towards cationic polymeri...

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  5. (A) Nylon-6 is obtained by polymerization of caprolactam. (R) Nylon-...

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  6. (A) P.V.C is an addition copolymer (R) P.V.C is used to prepare hand...

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  7. (A) Vulcanised rubber is stiff and has little tendency to absorb water...

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  8. (A) Natural rubber is cis polyisoprene. (R) Isoprene is 2-methyl-1,3...

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  9. (A) Thermosetting polymers are cross linked polymers. (R) Thermosett...

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  10. (A) Natural rubber is an elastomer. (R) The intermolecular forces of...

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  11. (A) Bakelite is prepared by copolymerisation of formaldehyde and pheno...

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  12. (A) Cellulose is natural polymer. (R) Cellulose is obtained from pla...

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  13. (A) Cellulose acetate is a semisynthetic polymer. (R) Natural polyme...

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  14. (A) Poly vinyl chloride is a linear polymer. (R) Poly vinyl chloride...

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  15. (A) L.D.P.E is a branched polymer. (R) L.D.P.E is inert tough and fl...

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  16. (A) Bakelite is a cross linked polymer. (R) Bakelite is formed from...

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  17. (A) Benzene does not undergo polymerisation. (R) Benzene loses aroma...

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  18. (A) Ethylene can undergo polymerisation. (R) Ethylene contain a weak...

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  19. (A) P.V.C is a homopolymer. (R) P.V.C is obtained by the polymerizat...

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  20. (A) Nylon 6,6 is a condensation co-polymer. (R) To prepare nylon-6, ...

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