ANDHERI /BORIVALI / DADAR / CHEMBUR / THANE / MULUND / NERUL BATCH: NAPJC-1,2,3 TOPIC Periodic Properties MARKS:113 Single choice (+3,-1) 1. The correct order of 1stionizationpotentials among the following elements Be, B, C, N and O is (a) B Be C O N (b) B Be C N O (c) Be B C N O (d) Be B C O N 2. Which of the following sets of atomic numbers belongs to that of alkali metals? (a) 1, 12, 30, 4, 62 (b) 37, 19, 3, 55 (c) 9, 17, 35, 53 (d) 12, 20, 56, 88 3. An atom with electronic configuration 2 2 6 2 6 3 21s , 2s , 2p ,3s ,3p ,3d , 4s can be placed in group: (a) fifth (b) fifteenth (c) second (d) third 4. The ions 2 2O ,F , Na , Mg and 3Al are isoelectronic. The ionic radii show: (a) a significant increase from 2O to 3Al (b) a significant decrease from 2O to 3Al (c) an increase from 2O to F and then increase from Na to 3Al (d) a decrease from 2O to F and then increase from Na to 3Al 5. With which of the following electronic configuration, an atom has the lowest ionization energy? (a) 2 2 31s 2s 2p (b) 2 2 6 11s 2s 2p 3s (c) 2 2 61s 2s 2p (d) 2 2 51s 2s 2p 6. Identity the correct order of size of the following: (a) 2 2Ca K Cl S (b) 2 2Ca K Cl S (c) 2 2Ca K Cl S (d) 2 2Ca K S Cl 7. Which of the following ions has the electronic configuration 6Ar 3d ? (a) 3Ni (b) 2Mn (c) 3Fe (d) 3Co 8. Which of the following represents the correct order of increasing electron gain enthalpy (magnetude

only)? (a) Cl F O S (b) O S F Cl (c) F S O Cl (d) S O Cl F 9. First three ionization energies of an element A are 520 kJ 1mol , 7298 kJ 1mol and 11815kJ 1mol

respectively. What is the expected formula of its chloride? (a) ACl (b) 2ACl (c) 3ACl (d) Data is insufficient 10. Based on Mulliken scale, which of the following is correct if EA and IE are in eV? (a) EA EN IE (b) EA 2IE EN (c) EA 2EN IE (d) None of these 11. The correct increasing order of second ionization energies of B, C and N is: (a) C B N (b) B C N (c) N B C (d) B N C 12. The smallest and the largest cations are respectively: (a) Li ,Cs (b) H ,Cs (c) 3 3Sc , U (d) 3H , Lr

13. 14

th of Avogadro number of atoms of an element absorb energy X kJ for ionization, the ionization

energy of the element is per atom:

(a) 0

2XN

(b) 0

4XN

(c) 04NX

(d) 0N4X

14. Pauling calculated electronegativity values of elements by using: (a) ionization energies (b) bond energies (c) electron affinities (d) both (a) and (b) 15. Atomic number 34 belongs to: (a) 3rd period, 15th group, p-block (b) 4th period, 16thgroup, p-block (c) 4th period, 2nd group, s-block (d) 5th period, 12th group, d-block 16. The first IP of lithium is 5.41 eV and electron affinity of Cl is 3.61eV . Calculate H in 1kJ mol

for the reaction: g g g gLi Cl Li Cl

(a) 173.7kJ (b) 190kJ (c) 200kJ (d) 556kJ 17. In which pair, the second atom is larger than first: (a) ,Br Cl (b) ,Na Mg (c) ,Sr Ca (d) ,N P 18. A neutral atom will have the lowest ionization potential when electronic configuration is: (a) 11s (b) 2 2 61 , 2 2s s p (c) 2 2 6 11 ,2 2 ,3s s p s (d) 2 2 21 , 2 2s s p 19. Which represents the electronic configuration of the most electropositive element: (a) 12He s (b) 16Xe s (c) 22He s (d) 26Xe s 20. Which one has lowest first ionization potential: (a) B (b) C (c) N (d) O 21. The order of first electron affinity of ,O S and Se is: (a) O S Se (b) S O Se (c) Se O S (d) Se S O 22. Which one has the smaller radius: (a) 2Be (b) Li (c) 2O (d) F 23. Which one has the smallest radius: (a) Cl (b) 2S (c) K (d) 2Ca 24. A sudden jump between the values of second and third ionization energies of an element would be

associated with the electronic configuration: (a) 2 2 6 11 ,2 2 ,3s s p s (b) 2 6 2 11 , 2 2 ,3 3s s p s p (c) 2 2 6 2 21 , 2 2 ,3 3s s p s p (d) 2 2 6 21 , 2 2 ,3s s p s 25. Electron affinity of (a) Carbon is greater than oxygen (b) Sulphur is lesser than oxygen (c) Iodine is higher than bromine (d) Bromine is lesser than chlorine 26. Atomic number of Cr is 24 , then 3Cr will be: (a) Diamagnetic (b) Paramagnetic (c) Ferromagnetic (d) None of these

27. 58 Ce is a member of: (a) s block element (b) p block elements (c) d block elements (d) f block elements 28. The ionic radii of 3 2,N O and F are respectively given by: (a) 1.36,1.40,1.71 (b) 1.36,1.71,1.40 (c)1.71,1.40,1.36 (d) 1.71,1.36,1.40 29. The first ionization potential of , ,Na Mg Al and Si are in the order: (a) Na Mg Al Si (b) Na Mg Al Si

(c) Na Mg Al Si (d) Si Al Na Mg 30. The formation of the oxide ion

2gO requires first an exothermic and then an endothermic step as

shown below:

1; 142g gO e O H kJ mol

2 1; 844g gO e O H kJ mol

This is because: (a) O ions has comparatively larger size than oxygen atom (b) Oxygen has high electron affinity (c) O ion will tend to resist the addition of another electron (d) Oxygen is more electronegative

31. In which of the following arrangements, the order is not correct according to the property indicated

against it: (a) Increasing size: 3 2 _Al Mg Na F (b) Increasing 1 :IE B C N O (c) Increasing 1 :EA I Br F Cl (d) Increasing metallic radius: Li Na K Rb 32. In a given shell the order of screening effect is: (a) s p d f (b) s p f d (c) f d p s (d) p s d f 33. Among the 2 3, ,LiCl BeCl BCl and 4CCl , the covalent bond character follows the order: (a) 2 3 4LiCl BeCl BCl CCl (b) 2 3 4LiCl BeCl BCl CCl (c) 2 4 3LiCl BeCl CCl BCl (d) 2 3 4LiCl BeCl BCl CCl 34. Covalent radius of Li is 123pm. The crystal radius of Li will be:

(a) 123 pm (b) 123pm (c) 123 pm (d) 1232

pm

35. Which bond is more polar? (a) C Cl (b) N F (c)C F (d) O F 36. MATCH THE COLUMN (+8,0) Column I Column II (Elelement) (Electronic configuration) (a) Gallium (p) 2 2 6 2 6 1 21 2 2 3 3 3 4s s p s p d s (b) Vanadium (q) 2 2 6 2 6 10 21 2 2 3 3 3 4s s p s p d s (c) Zinc (r) 2 2 6 2 6 10 2 11 2 2 3 3 3 4 4s s p s p d s p (d) Scandium (s) 2 2 6 2 6 3 21 2 2 3 3 3 4s s p s p d s

ANDHERI /BORIVALI / DADAR / CHEMBUR / THANE / MULUND / NERUL BATCH: NAPJC-1,2,3 TOPIC Periodic Properties MARKS:113

ANSWER KEY 1.a 2.b 3.a 4.b 5.b 6.a 7.d 8.b 9.a 10.c 11.a 12.b 13.b 14.b 15. b 16. (a) 17. (d) 18. (c) 19. (b) 20. (a) 21. (b) 22. (a) 23. (d) 24. (d) 25. (d) 26. (b) 27. (d) 28. (c) 29. (a) 30. (c) 31. (b) 32. (a) 33. (b) 34. (a) 35. (c) 36. (a-r), (b-s), (c-q), (d-p)