Home
Class 12
CHEMISTRY
(A) Position of double bond in poly isop...

(A) Position of double bond in poly isoprene can be detected by ozonolysis.
(R) Poly isoprene formation involve a head to tail mechanism.

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

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • POLYMERS

    AAKASH SERIES|Exercise OBJECTIVE EXERCISE - 3|18 Videos
  • PERIODIC TABLE

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|37 Videos
  • PRACTICAL CHEMISTRY

    AAKASH SERIES|Exercise PRACTICE SHEET-5 (Integer answer Type questions)|6 Videos

Similar Questions

Explore conceptually related problems

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

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions. The number of resonance structure possible for chlorobenzene is

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions. Which of the following is the correct order of reactivity of the aryl halides with a given nucleophile

Aryl halides are less reactive than alkyl halides due to the presence partial double character of C - X bond in aryl halides. Arly halides undergo nucleophilic substitution reactions, if electron withdrawing groups are introduced in ortho & para - positions in aryl halides. The reaction mechanism involves two steps. Keeping these points in view answer the following questions. Which compound undergo nucleophilic substitution under mild conditions

Isoprene is a diene. How are the positions of double bonds located?

Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. In which of the following all bonds are not equivalent?

Bond Length: Internuclear distance between two adjacent atoms in an species is known as bond length, -Bond length depends on: i) size of the atom involved in the bond formation ii) size of the orbitals involved in the bond formation iii) Lone pair-long pair repulsion iv) Resonance v) s-character of combining orbitals with the increasing size of the atoms and atomic orbitals bond length increases. Lone pair-lone pair repulsion increases bond length (if atoms are small sized) whereas resonance can increase some bond lengths and decrease some other bond length. With increasing s-character bond length decreases, whereas with increasing multiplicity of bonds, bond length decreases. However, in some cases, bond lengths are also affected by relative position of bonds (between two similar atoms). Usually but not always with increasing bond length, bond strength (and hence bond dissociation energy) decreases. The correct order of B-F bond length follows the sequence

When half-filled valence orbital of one atom overlaps with half-filled valence orbital of other atom, a covalent bond is fonned. Head on or axial overlap leads to the fonnation of sigma bond. Sidewise or lateral overlap of atomic orbitals (p) give rise to the formation of pi -bond. Similarly side wise overlap between d-orbitals can lead to the fomation of delta -bond. In case of pi -bond, the probability of finding the shared electron cloud is zero along the line joining two nuclei while ithe probability of finding the shared electron cloud is maximum along the inter nuclear axis. The strength of bonds by s-s, p-p, s-p overlap is in the order :

When half-filled valence orbital of one atom overlaps with half-filled valence orbital of other atom, a covalent bond is fonned. Head on or axial overlap leads to the fonnation of sigma bond. Sidewise or lateral overlap of atomic orbitals (p) give rise to the formation of pi -bond. Similarly side wise overlap between d-orbitals can lead to the fomation of delta -bond. In case of pi -bond, the probability of finding the shared electron cloud is zero along the line joining two nuclei while ithe probability of finding the shared electron cloud is maximum along the inter nuclear axis. lf x-axis is the internuclear axis then which of the following combination will result into the formation of pi -bond?

AAKASH SERIES-POLYMERS-OBJECTIVE EXERCISE - 4
  1. (A) Melamine is a thermosetting polymer (R) Melamine is a condensati...

    Text Solution

    |

  2. (A) Melamine polymers are used to prepare unbreakable crockery items. ...

    Text Solution

    |

  3. (A) Vulcanised Rubber suits industry than natural Rubber. (R) Elasti...

    Text Solution

    |

  4. (A) Rubber latex is colloidal dispersion in water with negatively char...

    Text Solution

    |

  5. (A) Ebonite contain a high percentage of sulphur. (R) Ebonite is a h...

    Text Solution

    |

  6. (A) The process of vulcanization can be accelerated by Zno or zinc ace...

    Text Solution

    |

  7. (A) Position of double bond in poly isoprene can be detected by ozonol...

    Text Solution

    |

  8. (A) Neoprene is a synthetic Rubber. (R) Neoprene is obtained from ch...

    Text Solution

    |

  9. (A) The P.D.I of synthetic polymer is greater than one. (R) Syntheti...

    Text Solution

    |

  10. (A) P.H.B.V is used in spaciality packing. (R) P.H.B.V is a Biodegra...

    Text Solution

    |

  11. (A) Biodegradable polymers are ecofriendly. (R) Biodegradable polyme...

    Text Solution

    |

  12. (A) Poly glycolic acid is used as post operative sutures. (R) Poly g...

    Text Solution

    |

  13. (A) Poly vinyl pyrrolidone is an addition homo polymer. (R) Poly vin...

    Text Solution

    |

  14. (A) In the preparation of plexi glass acetone is used. (R) Poly meth...

    Text Solution

    |

  15. (A) Buna-N is also known as G.R.A. (R) Buna-N is a synthetic Rubber.

    Text Solution

    |

  16. (A) The inter molecular forces in thermosetting polymer is strongest a...

    Text Solution

    |

  17. (A) Dextron is a non biodegradable polymer. (R) Dextron is used in s...

    Text Solution

    |

  18. (A) In natural rubber, the polyisoprene chains exist as coiled structu...

    Text Solution

    |

  19. (A) Bakelite is a thermosetting polymer. (R) Bakelite is a cross-lin...

    Text Solution

    |

  20. (A) Chloroprene is a synthetic rubber. (R) Synthetic rubbers may be ...

    Text Solution

    |