Chemistry - Mole Concept
Master iit academy
2nd Floor, Samsung Plaza, Near Benz Circle, VIJAYAWADA
PHYSICAL CHEMISTRY
(1) Shielding constant σ for Ne is 4.15 and the effective nuclear charge on Na+ and F- are respectively (A) 4.85 6.85 (B) 5.85 6.85 (C) 6.85 4.85 (D) 4.85 4.85
(2) Electron gain enthalpy and ionization energy of an atom are –a and +b eV respectively. The electronegativity of that atom on Mulliken scale is given by (A) a – b (B) (b – a )/2 (C) a + b (D) (a + b)/2
(3) The atomic radii of Li is 1.23 A0 and ionic radius of Li+ is 0.76 A0. The fraction of the volume occupied by 2s electron in Li is (A) 0.764 (B) 0.184 (C) 0.595 (D) 0.236
(4) Photons of monochromatic light having just sufficient energy to ionize Ar-atom are incidened over the mixture of inert gases He, Ne, Ar, Kr and Xe. The mixture will contain (A) He, Ne gases; Ar+, Kr+, Xe+ ions (B) He+, Ne+ ions; Ar, Kr, Xe gases (C) He+, Ne+, Ar+, Kr+, Xe+ gases (D) He+, Ne+, Ar+ ions and Kr, Xe gases
(5) If EA1 and EA2 for oxygen atom are -142 kJ mol-1 and 844 kJ mol-1. The energy released to form 2 O + 2 e ( 2 O - will be (A) 986 (B) 702 (C) 284 (D) 1688
(6) Dipole moment of K+Cl- is 3.336 x 10-29 cm and it is 80 ionic in nature. The inter ionic distance between K+ and Cl- in A0 is (A) 1.30 (B) 2.60 (C) 3.9 (D) 1.20
(7) Bond Order for CO+ and NO+ are respectively (A) 3.5, 3.0 (B) 2.5, 3.0 (C) 2.5, 2.5 (D) 3.0, 2.5
(8) Bond Order for N2+ and N2- are same. Which relation is correct for N2+ and N2- ? (A) Bond Energy of N2+ = Bond Energy of N2- (B) Bond Energy of N2+ > Bond Energy of N2- (C) Bond Energy of N2+ < Bond Energy of N2- (D) Bond Energy of N2+ < > Bond Energy of N2-
(9) The electron gain enthalpy of fluorine atom is 333 kJ mol-1 and dissociation energy of F2 is 158.8 kJ mol-1 Energy released during the formation of 2g F- from 2g F2 ( atomic
2nd Floor, Samsung Plaza, Near Benz Circle, VIJAYAWADA
PHYSICAL CHEMISTRY
(1) Shielding constant σ for Ne is 4.15 and the effective nuclear charge on Na+ and F- are respectively (A) 4.85 6.85 (B) 5.85 6.85 (C) 6.85 4.85 (D) 4.85 4.85
(2) Electron gain enthalpy and ionization energy of an atom are –a and +b eV respectively. The electronegativity of that atom on Mulliken scale is given by (A) a – b (B) (b – a )/2 (C) a + b (D) (a + b)/2
(3) The atomic radii of Li is 1.23 A0 and ionic radius of Li+ is 0.76 A0. The fraction of the volume occupied by 2s electron in Li is (A) 0.764 (B) 0.184 (C) 0.595 (D) 0.236
(4) Photons of monochromatic light having just sufficient energy to ionize Ar-atom are incidened over the mixture of inert gases He, Ne, Ar, Kr and Xe. The mixture will contain (A) He, Ne gases; Ar+, Kr+, Xe+ ions (B) He+, Ne+ ions; Ar, Kr, Xe gases (C) He+, Ne+, Ar+, Kr+, Xe+ gases (D) He+, Ne+, Ar+ ions and Kr, Xe gases
(5) If EA1 and EA2 for oxygen atom are -142 kJ mol-1 and 844 kJ mol-1. The energy released to form 2 O + 2 e ( 2 O - will be (A) 986 (B) 702 (C) 284 (D) 1688
(6) Dipole moment of K+Cl- is 3.336 x 10-29 cm and it is 80 ionic in nature. The inter ionic distance between K+ and Cl- in A0 is (A) 1.30 (B) 2.60 (C) 3.9 (D) 1.20
(7) Bond Order for CO+ and NO+ are respectively (A) 3.5, 3.0 (B) 2.5, 3.0 (C) 2.5, 2.5 (D) 3.0, 2.5
(8) Bond Order for N2+ and N2- are same. Which relation is correct for N2+ and N2- ? (A) Bond Energy of N2+ = Bond Energy of N2- (B) Bond Energy of N2+ > Bond Energy of N2- (C) Bond Energy of N2+ < Bond Energy of N2- (D) Bond Energy of N2+ < > Bond Energy of N2-
(9) The electron gain enthalpy of fluorine atom is 333 kJ mol-1 and dissociation energy of F2 is 158.8 kJ mol-1 Energy released during the formation of 2g F- from 2g F2 ( atomic