Home
Class 11
CHEMISTRY
The hydries of first elements in grounp ...

The hydries of first elements in grounp 15 to 17 amely `NH_(3) H_(2)O` and HF rectively show abnormally high values for meltin and bolting points this is due to

A

Small size of N,O and F

B

The ability to form extensive intermolecular H-bonding

C

The ability to form extensive intramolecular H-bonding

D

Effective van der Waal's interaction

Text Solution

Verified by Experts

The correct Answer is:
B
Abnormal melting points due to their ability of forming intermolecular H-bonding.
Promotional Banner

Topper's Solved these Questions

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise LECTURE SHEET EXERCISE -I (LEVEL-II (ADVANCED) More than one correct answer Type Questions)|5 Videos

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise LECTURE SHEET EXERCISE -I (LEVEL-II (ADVANCED) Linked Comprehension Type Questions)|2 Videos

  • HYDROGEN AND ITS COMPOUNDS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|20 Videos

  • HYDROCARBONS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE SHEET ( LEVEL-II (PRACTICE SHEET (ADVANCED) (MATRIX MATCHING TYPE QUESTIONS)))|5 Videos

  • IONIC EQUILIBRIUM

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE (LEVEL -II PRACTICE SHEET (ADVANCED) (Integer Type Questions))|8 Videos

Similar Questions

Explore conceptually related problems

Among NH_(3),H_(2)O and HF, which would you expect to have highest magnitude of hydrogen bonding and why?

The relative nucleophilicity of NH_3, H_2O and HF towards bromoethane is

The boiling points of NH_(3) , H_(2)O and HF are higher than those of the hydrides of the subsequent members of the group. Give your reasons.

Give reasons for the higher bioling point of H_2 O than HF and NH_3

Given below are four statements (A-D) each with one or two blanks. Select the option which correctly fills up the blanks in two statements. (A)Wings of butterfly and bird look alike and are the results of (i), evolution. (B) Miller showed that CH_(4), H_(2), NH_(3) , and (1) when exposed to electric discharge in a flask resulted in formation of (ii) (C) Veriform appendix is a (i) organ and an (ii) evidence of evolution. (D) According to Darwin evolution took place due to (i) and (ii) of the fittest.

An orbital is designated by certain values of first three quantum numbers (n, l and m) and according to Pauli.s exclusion principle, no two electrons in a atom can have all the for quantum numbers equal. N, l and m denote size, shape and orientation of the orbital. The permissible values of n are 1,2,3.... prop while that of 1 are all possible integral values from 0 to n-n. Orbitals with same values of n and 1 but different values of m (where m can have any integral values from 1 to +1 including zero) are of equal energy and are called degenerate orbitals. However degeneracy is destroyed in homogeneous external magnetic field due to different extent of interaction between the applied field and internal electronic magnet of different orbitals differing in orientations. In octahedral magnetic field external magnetic field as oriented along axes while in tetrahedral field the applied field actas more in between the axes than that on the axes themselves. For 1=0, 1,2,3,...., the states (called sub-shells) are denoted by the symbol s,p,d,f.....respectively. After f, the subshells are denoted by letters alphabetically 1 determines orbital angular motion (L) of electron as L = sqrt(l(l+1))(h)/(2pi) ON the other hand, m determines Z-component of orbital angular momentum as L_(Z) = m((h)/(2pi)) Hund.s rule states that in degenerate orbitals electrons do not pair up unless and until each each orbitals has got an electron with parallesl spins Besides orbital motion,an electron also posses spin-motion. Spin may be clockwise and anticloskwise. Both these spin motions are called two spins states of electrons characterized by spin Q.N (s) : s = +(1)/(2) and = -(1)/(2) respectively The sum of spin Q.N. of all the electrons is called total spin(s) and 2s+1 is called spin multiplicity of the configuration as a whole. The spin angular momentum of an electron is written as L_(s) = sqrt(s(s+1))(h)/(2pi) According to Hund.s rule, the distribution of electron within the various orbitals of a given sub-shell is one which is associated with

An orbital is designated by certain values of first three quantum numbers (n, l and m) and according to Pauli.s exclusion principle, no two electrons in a atom can have all the for quantum numbers equal. N, l and m denote size, shape and orientation of the orbital. The permissible values of n are 1,2,3.... prop while that of 1 are all possible integral values from 0 to n-n. Orbitals with same values of n and 1 but different values of m (where m can have any integral values from 1 to +1 including zero) are of equal energy and are called degenerate orbitals. However degeneracy is destroyed in homogeneous external magnetic field due to different extent of interaction between the applied field and internal electronic magnet of different orbitals differing in orientations. In octahedral magnetic field external magnetic field as oriented along axes while in tetrahedral field the applied field actas more in between the axes than that on the axes themselves. For 1=0, 1,2,3,...., the states (called sub-shells) are denoted by the symbol s,p,d,f.....respectively. After f, the subshells are denoted by letters alphabetically 1 determines orbital angular motion (L) of electron as L = sqrt(l(l+1))(h)/(2pi) ON the other hand, m determines Z-component of orbital angular momentum as L_(Z) = m((h)/(2pi)) Hund.s rule states that in degenerate orbitals electrons do not pair up unless and until each each orbitals has got an electron with parallesl spins Besides orbital motion,an electron also posses spin-motion. Spin may be clockwise and anticloskwise. Both these spin motions are called two spins states of electrons characterized by spin Q.N (s) : s = +(1)/(2) and = -(1)/(2) respectively The sum of spin Q.N. of all the electrons is called total spin(s) and 2s+1 is called spin multiplicity of the configuration as a whole. The spin angular momentum of an electron is written as L_(s) = sqrt(s(s+1))(h)/(2pi) The orbital angular momentum of electron (l=1) makes an angles of 45^(@) from Z-axis. The L_(z) of electron will be

The first element of a group differes from its congeners, i.e other members of the group in many ways. These difference may be due to the following i) Small size of atom and ion ii) High electronegetivity iii) Non-availability of low lying d-orbitals The first element of a group shows resemblance with the second element of the adjacent group on the right. This is known as diagonal relationship Metal (M)+ N_(2) rarr "Nitride" underset("hydroysis")overset(H_(2)O)rarr NH_(3) . Metal (M) can be

Hydrogen bonding is said to be formed, -when sightly acidic hydrogen-atom attached to a strongly, electronegative fluorine, oxygen or nitrogen atom. is held with weak. electrostatic forces by the non-bonded pair of electrons of another atom. The co-ordination number of hydrogen in such cases is two. It acts as a bridge between two atoms, to one of which it is covalently bonded and to other attached through electrostatic forces, also called hydrogen bond. Though the hydrogen atoms in a methyl group are not polarised, if an electronegative group like chloro, carbonyl, nitro or cyano (in order to increase electronegativity) is attached to it, the C-H bond gets polarised due to the inductive effect and the hydrogen atom becomes slightly acidic resulting in the formation of weak hydrogen bonds. Though a weak bond the H-bond effects is large number of the physical properties of compounds some of which are - Boiling points of liquids - Solubility of polar compounds in polar solvents (containig H attached with strong electronegative atom) - Viscosity of liquids . Acidity Which of the following combinations can involve hydrogen bonding I) Mixture of KF and HF " " II) Mixture of CH_(3)COCH_(3) and CHCI_(3) III) Mixture of NH_(4) CI and H_(2)O" " IV) Mixture of CH_(3) and H_(2)O

AAKASH SERIES-HYDROGEN AND ITS COMPOUNDS-LECTURE SHEET EXERCISE -I (LEVEL-II (ADVANCED) Straight Objective Type Questions)
  1. In which of the following reaction does bydragen act as an oxidising a...

    Text Solution

    |

  2. In which of the following reaction does bydragen act as an oxidising a...

    Text Solution

    |

  3. In Boschis process which als fised for the production of hydrogen

    Text Solution

    |

  4. When the same amount of zinc is treated with excess if H2SO4 and with ...

    Text Solution

    |

  5. The hydries of first elements in grounp 15 to 17 amely NH(3) H(2)O an...

    Text Solution

    |

  6. The orange coloured compound formed when H2O2 is added TiO2 lon acidif...

    Text Solution

    |

  7. H(2)O(2) oxidised the following

    Text Solution

    |

  8. Which is not a property of H(2)O(2)

    Text Solution

    |

  9. The volume of perhydrol required to get one liter of oxygen at STP is

    Text Solution

    |

  10. Which of the following can NOT change the colour of litmus paper

    Text Solution

    |

  11. A commercial sample of hydrogen peroxide is labelled as 10 Volume, its...

    Text Solution

    |

  12. The volume strength of 15 N H(2)O(2) is

    Text Solution

    |

  13. During decomposition of H(2)O(2), its undergoes

    Text Solution

    |

  14. The volume of liberated at STP from 20ml of Vol H(2)O(2) is

    Text Solution

    |

  15. The method of storing of H(2)O(2) is

    Text Solution

    |

  16. Exhausted anion exchange resin is revived by using solution of

    Text Solution

    |

  17. Exhausted cation exchange resin is regenerated by using solution of mo...

    Text Solution

    |

  18. Degree of liness of water is expressed in terms of ppm of

    Text Solution

    |

  19. Hardness of water is expressed as the number of parts by weight of pre...

    Text Solution

    |

  20. 10^5g of a sample of water contained 16.2 g of Ca(HCO3)2 its hardness ...

    Text Solution

    |