Home
Class 12
CHEMISTRY
Assertion : White phosphorus is more rea...

Assertion : White phosphorus is more reactive than red phosphorus.
Reason : Red phosphorus consists of `P_4` tetrahedral units linked to one another to form linear chains.

A

If both Assertion and Reason are correct and Reason is the correct explanation of Assertion

B

If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

C

If Assertion is correct , but Reason is incorrect

D

If both Assertion and Reason are incorrect

Text Solution

Verified by Experts

The correct Answer is:
B
White phosphorus exists as `P_4` tetrahedral molecule having P-P-P bond angle `60^@`. Hence the molecule is under strain and more reactive. On the other hand red phosphorus exists as `P_4` tetrahedra which are joined together through covalent bonds giving polymeric structure.
Promotional Banner

Topper's Solved these Questions

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL-I|50 Videos

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL-II|50 Videos

  • P-BLOCK ELEMENTS

    BRILLIANT PUBLICATION|Exercise LEVEL II|50 Videos

  • NUCLEAR CHEMISTRY

    BRILLIANT PUBLICATION|Exercise LEVEL-III (Linked Comprehension Type) |11 Videos

  • POLYMERS, BIOMOLECULES AND CHEMISTRY IN EVERYDAY LIFE

    BRILLIANT PUBLICATION|Exercise LEVEL -III (Comprehension Type) |12 Videos

Similar Questions

Explore conceptually related problems

Which property is made use of in separating red phosphorus from white phosphorus?

Write main differences between the properties of white phosphorus and red phosphorus.

White phosphorus occurs as discrete P_4 units, where P atoms lie at the corners of a regular tetrahedral. The PPP bond angle is

Assertion: N_2 is less reactive than P Reason: Nitrogen gas more negative electron gain enthalpy than phosphorous

Important allotropic forms of phosphorus are white phosphorus, red phosphorus and black phosphorus. Among these, which allotropic' form is more reactive? Why

Assertion : Elementary phosphorus exists in three principal allotropic forms, i.e., white (yellow), red (or violet) and black. Reason : Of the three forms, white phosphorus is the most important and most reactive.

Assertion : If a liquid solute more volatile than the solvent is added to the solvent, the papour pressure of the solution may increase i.e. p_s gt p^@. Reason In the presence of a more volatile liquid solute, only the solute will form the vapours and solvent will not.

Atoms in P_4 molcule of white phosphorus are arranged regularly in the following way:

BRILLIANT PUBLICATION-P-BLOCK ELEMENTS-LEVEL II (ASSERTION AND REASON)
  1. Assertion : Salts of ClO3^- and ClO4^- are well known but those of FO3...

    Text Solution

    |

  2. Assertion : Xenon fluorides are well known and stable but the correspo...

    Text Solution

    |

  3. Assertion Although PF5,PCl5 and PBr5 are known, the pentahalides of ni...

    Text Solution

    |

  4. Assertion : F atom has a less negative election gain enthalpy than Cl ...

    Text Solution

    |

  5. Assertion : White phosphorus is more reactive than red phosphorus. ...

    Text Solution

    |

  6. Assertion: SF6 can't be hydrolysed but SF4 can be. Reason: Six fluor...

    Text Solution

    |

  7. Assertion : In vapour state sulphur is paramagnetic in nature. Reas...

    Text Solution

    |

  8. Assertion : Fluorine combines with sulphurto form SF6 but no other hal...

    Text Solution

    |

  9. Assertion : Fluorine oxidises water to oxygen whereas chlorine and bro...

    Text Solution

    |

  10. Assertion : HClO4 is a stronger acid than HClO3 Reason : Oxidation ...

    Text Solution

    |

  11. Assertion : The covalence of nitrogen in N2O5 is 5. Reason : Nitrog...

    Text Solution

    |

  12. Assertion: Molecular nitrogen is less reactive than molecular oxygen ...

    Text Solution

    |

  13. Assertion : On cooling, the brown colour of nitrogen dioxide disappear...

    Text Solution

    |

  14. Assertion : Elementary phosphorus exists in three principal allotropic...

    Text Solution

    |

  15. Assertion : H-S-H bond angle in H2S is closer to 90^@ but: H-O-H bond ...

    Text Solution

    |

  16. Assertion : HOF bond angle is higher than HOCI bond angle in HOX. 'R...

    Text Solution

    |

  17. Assertion : Noble gases have positive electron gain enthalpy. Reaso...

    Text Solution

    |

  18. Assertion : The O-O bond length in H2O2 is shorter than that of O2F2 ...

    Text Solution

    |

  19. Assertion : The aqueous solution of XeF2 is powerful oxidising agent. ...

    Text Solution

    |

  20. Assertion : Superoxides of alkali metals are paramagnetic. Reason :...

    Text Solution

    |