Home
Class 12
CHEMISTRY
Which one of the following statements is...

Which one of the following statements is/are incorrect : a)Atomic radius of Be is larger than that of Al. b)`Delta_(eg)H` of Se is -195 kJ/mol where as that of O is -141 KJ/mol. c)First ionization energy of N is greater than that of Ne d)CO, NO and `N_(2)O` are neutral oxides.

A

Atomic radius of Be is larger than that of Al.

B

`Delta_(eg)H` of Se is -195 kJ/mol where as that of O is -141 KJ/mol.

C

First ionization energy of N is greater than that of Ne

D

CO, NO and `N_(2)O` are neutral oxides.

Text Solution

Verified by Experts

The correct Answer is:
A, C
Promotional Banner

Topper's Solved these Questions

  • ORGANIC COMPOUNDS CONTAINING NITROGEN

    NARAYNA|Exercise EXERCISE-4|30 Videos

  • POLYMERS

    NARAYNA|Exercise EXERCISE -4|8 Videos

Similar Questions

Explore conceptually related problems

From the following data at 25^(@)C {:(Reaction ,Delta_(r)H^(o)kJ//mol),((1)/(2)H_(2)(g)+(1)/(2)O_(2)(g)toOH(g),42),(H_(2)(g)+(1)/(2)O_(2)(g)to H_(2)O(g),-242),(H_(2)(g)to 2H(g),436),(O_(2)(g)to2O(g),495):} Which of the following Statement (s) is /are Correct: StatementA: Delta_(r)H^(@) "for the reaction" H_(2)O(g)to2H(g)+O(g)"is 925.5kJ/mol" Statement B: Delta_(r)H^(@) "for the reaction" H_(2)O(g)toH(g)+O(g)"is 423.5kJ/mol" Statement C:Enthalpy of formation of H(g) is-218 kJ/mol Statement D: Enthalpy of formation of OH(g) is 42 kJ/mol

Answer the following question (Based on EA, Delta_(eg)H^(ɵ) and IE ). (a) IE_(1) of Li is 5.4 eV "atom"^(-1) and the EA of Cl is 3.6 eV "atom"^(-1) . Calculate Delta_( r)H^(ɵ) in "kcal mol"^(-1) and kJ mol^(-1) for the reaction Li_((g))+Cl_((g)) rarr Li_((g))^(o+)+Cl_((g))^(ɵ) formed at such a low pressure that resulting ions do not combine with each other. (b) The IE of atoms X and Y are 400 and 300 kcal mol^(-1) respectively. EA's of these atoms are 80.0 and 85.0 K cal mol^(-1) . Explain as which of the atoms has higher EN . ( c) Explain why EA of S is -200 kJ mol^(-1) but the second EA is +649 kJ mol^(-1) ? (d) Which of the following pairs of elements would have more negative electron gain enthalpy (Delta_("eg")H^(ɵ)) ? (i) F or Cl , (ii) O or F (e) What would be the second electron gain enthalpy (Delta_(eg)H_(2)^(ɵ)) of oxygen as positive, more negative or less negative than first (Delta_(eg)H_(1)^(ɵ)) ? Explain. (f) Which has less negative Delta_(eg)H^(ɵ) oxygen or sulphur?

N_(2) undergoes photochemical dissociation into one normal N- atom and one N- atom having 0.1eV more energy than normal N- atom. The dissociation of N_(2) into two normal atom of N requires 289.5 KJ//mol energy. The maximum wavelength effective for photochemical dissociation of N_(2) in nm is P nm ( 1 eV = 96.5 KJ/mol). Find the value of (P)/(100) .

Bond energies can be obtained by using the following relation: DeltaH (reaction) = sum Bond energy of bonds, broken in the reactants -sum Bond energy fo bonds, formed in the products Bond enegry depends on three factors: a. Greater is the bond length, lesser is the bond enegry. b. Bond energy increases with the bond multiplicity. c. Bond enegry increases with electronegativity difference between the bonding atoms. Use the bond enegries to estimate DeltaH for this reaction: H_(2)(g) +O_(2)(g) rarr H_(2)O_(2)(g) {:("Bond","Bond energy"),(H-H,436 kJ mol^(-1)),(O-O,142 kJ mol^(-1)),(O=O, 499kJ mol^(-1)),(H-O,460kJ mol^(-1)):}

From the following data, mark the option (s) where Delta H is correctlt written for the given reaction. Given H^(+)(aq) + OH^(-)(aq) rarr H_(2)O(l), Delta H = -57.3 kJ Delta H_("solution") of HA(g) = -70.7kJ/mol Delta H_("solution") of BOH(g) = 20kJ/mol Delta H_("ionization") of HA = 15 kJ/mol and BOH is a strong base Reaction Delta H_(r)(kJ//mol)

NARAYNA-PERIODIC TABLE -All Questions
  1. Which of the following statement(s) is /are correct?

    Text Solution

    |

  2. Which of the following statements is/are correct?

    Text Solution

    |

  3. Which one of the following statements is/are incorrect : a)Atomic radi...

    Text Solution

    |

  4. Poor shielding of nuclear charge by d or f-orbital elements is respons...

    Text Solution

    |

  5. The correct order(s) of stability of oxidation state(s) for Ge, Sn and...

    Text Solution

    |

  6. The screening effect of inner electrons of an atom can cause

    Text Solution

    |

  7. The energy required to pull the most loosely bound electrons from an a...

    Text Solution

    |

  8. The energy required to pull the most loosely bound electrons from an a...

    Text Solution

    |

  9. The energy required to pull the most loosely bound electrons from an a...

    Text Solution

    |

  10. The second ionisation energies are higher than the first ionisation en...

    Text Solution

    |

  11. The second ionisation energies are higher than the first ionisation en...

    Text Solution

    |

  12. The second ionisation energies are higher than the first ionisation en...

    Text Solution

    |

  13. Nuclear charge actually experienced by an electron is termed as effect...

    Text Solution

    |

  14. Nuclear charge actually experienced by an electron is termed as effect...

    Text Solution

    |

  15. Nuclear charge actually experienced by an electron is termed as effect...

    Text Solution

    |

  16. The main group elements complete their elctron configuration using s a...

    Text Solution

    |

  17. The main group elements complete their elctron configuration using s a...

    Text Solution

    |

  18. The main group elements complete their elctron configuration using s a...

    Text Solution

    |

  19. The periodicity is related to the electronic configuration. That is, a...

    Text Solution

    |

  20. The periodicity is related to the electronic configuration. That is, a...

    Text Solution

    |