Chemistry_Class-11_Chapter-3_Topic-3_Ionisation Energy 1 / 30 1. The statement that is not correct for the periodic classification of elements is (a) The properties of elements are the periodic functions of their atomic number (b) Non-metallic elements are lesser in number than metallic elements (c) The first ionization energies along a period do not vary in a regular manner with increase in atomic number (d) For transition elements the d-sub-shells are filled with electrons monotonically with increase in atomic number 2 / 30 2.Which of the following element has maximum, first ionization potential (a) V (b) Ti (c) Cr (d) Mn 3 / 30 3. The first ionization potential of Na, Mg, Al and Si are in the order (a) Na Al < Si (b) Na > Mg > Al > Si (c) Na < Mg Si (d) Na > Mg > Al < Si 4 / 30 4. The increasing order of the first ionization enthalpies of the elements B, P, S and F (lowest first) is (a) F < S < P < B (b) P < S < B < F (c) B < P < S < F (d) B < S < P < F 5 / 30 5. Which of the following gaseous atoms has highest value of IE (a) P (b) Si (c) Mg (d) Al 6 / 30 6. Hydrogen has high ionization energy than alkali metals, due to its (a) Large size (b) Small size (c) Ionic bond (d) Covalent bond 7 / 30 7. Which one of the following elements has the highest ionization energy (a) [Ne]3s2 3p1 (b) [Ne] 3s2 3p2 (c) [Ne] 3s2 3p3 (d) [Ar] 3d10 4s2 4p2 8 / 30 8. The set representing the correct order of first ionization potential is (a) K > Na > Li (b) Be > Mg > Ca (c) B > C > N (d) Ge > Si > C 9 / 30 9. Among the following options, the sequence of increasing first ionization potential will be (a) B < C < N (b) B > C > N (c) C < B < N (d) C > N > B 10 / 30 10. Which has the highest second ionization potential (a) Nitrogen (b) Carbon (c) Oxygen (d) Fluorine 11 / 30 11. Which has maximum first ionization potential (a) C (b) N (c) B (d) O 12 / 30 12. The first ionization potential of Na is 5.1 eV. The value of electron gain enthalpy of Na+ will be (a) -2.55 eV (b) -5.1 eV (c) -10.2 eV (d) +2.55 eV 13 / 30 13. Which of the following atoms has the highest first ionization energy (a) Na (b) K (c) Sc (d) Rb 14 / 30 14. Which of the following is not the correct increasing order of ionization energy (a) Cl+ < Ar < K+ (b) Au < Ag < Cu (c) Cs < Rb < K (d) K < Ca < Sc 15 / 30 15. The correct order of second ionization potential of carbon, nitrogen, oxygen and fluorine is (a) C > N > O > F (b) O > N > F > C (c) O > F > N > C (d) F > O > N > C 16 / 30 16. Which of the order for ionization energy is correct (a) Be > B > C > N > O (b) B < Be < C < O < N (c) B < Be < C < N < O (d) B < Be < N < C < O 17 / 30 17. The incorrect statement among the following is (a) The first ionization potential of Al is less than the first ionization potential of Mg (b) The second ionization potential of Mg is greater than the second ionization potential of Na (c) The first ionization potential of Na is less than the first ionization potential of Mg (d) The third ionization potential of Mg is greater than the third ionization potential of Al 18 / 30 18. Which of the following order is wrong (a) NH3 < PH3 < AsH3 -acidic nature (b) Li+ < Na+ < K+ < Cs+ -ionic radius (c) Al2 O3 < MgO < Na2O < K2O -basic (d) Li < Be < B < C - 1st ionization potential 19 / 30 19. Which of the following transitions involves maximum amount of energy (a) M -(g) → M(g) (b) M(g) → M ^ (g) (c) M+(g) → M2+(g) (d) M2+(g) → M3+(g) 20 / 30 20. Order of first ionization potentials of elements Li, Be, B, Na is (a) Li > Be > B > Na (b) Be > B > Li > Na (c) Na > Li > B > Be (d) Be > Li > B > Na (e) B > Be > Li > Na 21 / 30 21. The formation of the oxide ion O2-(g) requires first an exothermic and then an endothermic step as shown below O(g) + e- = O-(g)∆H° = -142 kJmol-1 O(g)+e = O2-(g) ∆ H° = 844 kJmol-1 This is because (a) O- ion will tend to resist the addition of another electron (b) Oxygen has high electron affinity (c) Oxygen is more electronegative (d) O- ion has comparatively larger size than oxygen atom 22 / 30 22. Which of the following represents the correct order of increasing first ionization enthalpy for Ca, Ba, S, Se and Ar (a) Ca < S < Ba < Se < Ar (b) S < Se < Ca < Ba < Ar (c) Ba < Ca < Se < S < Ar (d) Ca < Ba < S < Se < Ar 23 / 30 23. The first ionization potentials in electron volts of nitrogen and oxygen atoms are respectively given by (a) 14.6, 13.6 (b) 13.6, 14.6 (c) 13.6, 13.6 (d) 14.6, 14.6 24 / 30 24. The elements which occupy the peaks of ionization energy curve, are (a) Na, K, Rb, Cs (b) Na, Mg, Cl, I (c) Cl, Br, I, F (d) He, Ne, Ar, Kr 25 / 30 25. Among halogens, the correct order of amount of energy released in electron gain (electron gain enthalpy) is (a) F > Cl > Br > I (b) F < Cl < Br < I (c) F Br > I (d) F < Cl < Br < I 26 / 30 26. The first ionization enthalpies for three elements are 1314. 1680 and 2080kJmol-1 respectively. The correct sequence of the element is (a) O,F and Ne (b) F,O and Ne (c) Ne, F and O (d) F, Ne and O 27 / 30 27. The electronic configuration of an element with the largest difference between the 1st and 2nd ionization energies is (a) 1s2 2s2 2p6 (b) 1s2 2s2 2p6 3s1 (c) 1s2 2s2 2p6 3s22 (d) 1s2 2s2 2p1 28 / 30 28. The element having greatest difference between its first and second ionization energies, is (a) Ba (b) K (c) Ca (d) Sc 29 / 30 29. In comparison to boron, beryllium has (a) Greater nuclear charge and lesser first ionization enthalpy (b) Lesser nuclear charge and lesser first ionization enthalpy (c) Lesser nuclear charge and greater first ionization enthalpy (d) Greater nuclear charge and greater first ionization enthalpy 30 / 30 30. For the second period elements the correct increasing order of first ionization enthalpy is (a) Lt < Be < B < C < O < N < F < Ne (b) Li < Be < B < C < N < O < F < Ne (c) Li < B < Be < C < O < N < F < Ne (d) Li < B < Be < C < N < O < F < Ne Your score isThe average score is 0% 0% Exit
