Home
Class 11
CHEMISTRY
Fluorine is more electronegative than ei...

Fluorine is more electronegative than either boron or phosphorus. What conclusion can be drawn from the fact that `BF_3` has no dipole moment but `PF_3` does ?

A

`BF_3` molecule must be linear

B

`BF_3` is not spherically symmetrical but `PF_3` is

C

The atomic radius of P is larger than that of B

D

The `BF_3` molecule must be planar triangular

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • ORGANIC CHEMISTRY: SOME BASIC PRINCIPLES AND TECHNIQUES

    PATHFINDER|Exercise QUESTION BANK|85 Videos

  • PERIODIC CLASSIFICATION OF ELEMENTS AND PERIODIC PROPERTIES

    PATHFINDER|Exercise QUESTION BANK|77 Videos

Similar Questions

Explore conceptually related problems

B- F bond is polar but BF_3 does not have a dipole moment — why?

A DNA molecule has higher melting point having more number of GC pairs than another DNA molecule which has more number of AT pairs. What conclusion can be drawn from this fact?

Though B — F bond is polar in nature yet BF_3 , molecule has no dipole moment— why.

This question has statement I and Statement II . Of the four choices given after the statements, choose the one that best describes the two Statements. Statement-I:The dipole moment of CH_3F is lower than that of CH_3Cl . Statement-II:C-F bond is more polar than C-Cl bond.

This question has statement I and Statement II. Of the four choices given after the statements, choose the one that best describes the two Statements. (1) Statement-I is true, Statement-II is true, Statement-II is a correct explanation of Statement-I (2) Statement-I is true, Statement-II is true,Statement-II is not a correct explanation of Statement-I (3)Statement-I is a true , Statement-II is false (4) Statement-I is false, Statement-II is true Statement 1 : Silicon tetrafluoride, SiF_4 is non polar even though fluorine is much more electronegative than silicon. Statement 2: The four bond dipoles cancel one another in SiF_4 .

Twelve cards numbered 1 to 12 are placed in a box, mixed up thoroughly and then a card is drawn at random from the box. If it is known that the number on the drawn card is more than 3, find the probability that it is an even number.

H, He^(+), Li^(2+) are examples of atoms or ions with one electron each . The energy of such atoms when in the n-th energy state (according to Bohr,s theory , n=1,2,3…. =principal quantum number ) is E_n =(13.6 Z^2)/(n^2) eV (1 eV =1.6xx10^(-19)J) . For the ground state ,n=1 . in order to raise the atom from the ground state to n=f , the suitable incident light should have a wavelength given by lambda=(hc)/(E_f-E_1) . But the atom cannot stay permanently in the f-energy state, ultimately , it comes to the ground state by radiating the extra energy , E_f-E_1 as electromagnetic radiation . The electron of the atom comes from n=f to n=1 in one or more steps using the permitted energy levels . As a result there is a possibility of emission of radiation with more than one wavelength from the atom. Planck's constant =6.63 xx10^(-34)J*s and velocity of light c=3xx10^(8)m*s^(-1) . For what wavelength of incident radiation He^+ ion will be raised to fourth quantum state from ground state?

H, He^(+), Li^(2+) are examples of atoms or ions with one electron each . The energy of such atoms when in the n-th energy state (according to Bohr,s theory , n=1,2,3…. =principal quantum number ) is E_n =(-13.6 Z^2)/(n^2) eV (1 eV =1.6xx10^(-19)J) . For the ground state ,n=1 . in order to raise the atom from the ground state to n=f , the suitable incident light should have a wavelength given by lambda=(hc)/(E_f-E_1) . But the atom cannot stay permanently in the f-energy state, ultimately , it comes to the ground state by radiating the extra energy , E_f-E_1 as electromagnetic radiation . The electron of the atom comes from n=f to n=1 in one or more steps using the permitted energy levels . As a result there is a possibility of emission of radiation with more than one wavelength from the atom. Planck's constant =6.63 xx10^(-34)J*s and velocity of light c=3xx10^(8)m*s^(-1) . (i)What is the wavelength of the light incident on the atom to raise it to the fourth quantum level from ground state ?

PATHFINDER-P-BLOCK ELEMENTS -QUESTION BANK
  1. Specify the coordination geometry around and hybridization of N and B ...

    Text Solution

    |

  2. Which of the following statements is correct?

    Text Solution

    |

  3. Fluorine is more electronegative than either boron or phosphorus. What...

    Text Solution

    |

  4. Aluminium (III) chloride forms a dimer because:

    Text Solution

    |

  5. Structure of Na2B4O7.10H2O contains

    Text Solution

    |

  6. Which of the following compounds is formed in borax bead test?

    Text Solution

    |

  7. The shape of gaseous SnCl2 is

    Text Solution

    |

  8. The percentage of lead in lead pencil is

    Text Solution

    |

  9. Which oxide of lead is used in lead storage batteries, in safety match...

    Text Solution

    |

  10. Ge (II) compounds are powerful reducing agents whereas Pb (IV) compoun...

    Text Solution

    |

  11. PbCl4 exist while PbBr4 and PbI4 do not exist.-Explain.

    Text Solution

    |

  12. Which of the following is most stable?

    Text Solution

    |

  13. Bio gas and producer gas are made up of

    Text Solution

    |

  14. Name the structure of silicates in which three oxygen atoms of [SiO4]^...

    Text Solution

    |

  15. When excess of SnCl2 is added to HgCl2, the substance formed is

    Text Solution

    |

  16. Mg2C3 has the following characteristics

    Text Solution

    |

  17. The number and type of bonds between two carbon atoms in CaC2 are

    Text Solution

    |

  18. Carbogen has X% of CO2 and is used as an antidote for poisoning of Y. ...

    Text Solution

    |

  19. PbF4,PbCl4 exists but PbBr4 and Pbl4 do not exist because of

    Text Solution

    |

  20. Anhydrous AlCl3 is covalent however, when it is dissolved in water hyd...

    Text Solution

    |