This Mcqs is from R.R.Mehta College of Science , Palanpur
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1.... Which complexion is expected to be subject to a Jahn-Teller distortion?
a. [Cr(OH2)6]+3
b. [Cr(NH3)6]+2 ☑️
c. [Cr(CN)6]3–
d. [Cr(bpy)3]2+
2 Which of the following complex ions is tetrahedral?
a. [PdCl4]2–
b. [PtCl4]2–
c. [NiCl4]2–
d. [AuCl4]– ☑️
3. Which series correctly places the ligands in order of increasing nephelauxetic effect?
a. F–< Cl–< I– ☑️
b. I–< Cl–< F–
c. en < NH3 < H2O
d. I–< Br–< [CN]–
4. For which pair of complexes is the order of values of Δoct correct?
a. [Rh(NH3)6]3+ > [Co(NH3)6]3+☑️
b. [Fe(CN)6]4–> [Fe(CN)6]3–
c. [Cr(OH2)6]2+ > [Cr(OH2)6]3+
d. [CrF6]3–> [Cr(CN)6]3–
5. d1 electrones configuration corresponds to which of the following terms?
a. 2D ☑️
b. 1D
c. 2P
d. 3P
6. How many microstates are possible for a p1 configuration, including both weak and strong field limits?
a. 15
b. 9
c. 6 ☑️
d. 45
7. Which of the following corresponds to the Laporte selection rule?
a. Δl = 0, +1 or –1
b. Δn = 0, +1 or –1
c. Δn = +1 or –1 ☑️
d. Δl = +1 or –1
8. Which one is not a borane?
a. B5H9 b. B5H10☑️ c. B5H11 d. B6H10
9. Number of lone pair (s) in XeOF4 is
a. 0☑️ b. 1 c. 2 d. 3
10. The compound that undergoes oxidative addition reaction in presence of H2 is
a. [Mn(CO)5]–
b. [(η5– C5H5)Mo(CO)]–
c. [IrCl(CO)(PPh3)2] ☑️
d. [(η5– C5H5)2 ReH]
11. The number of metal-metal bonds in Ir4(CO)12is
a. 4 b. 6☑️ c. 10 d. 12
12 Oxidation occurs very easily in case of
a. η5-( C5H5)2 Fe
b. η5-( C5H5)2 Co☑️
c. η5-( C5H5)2 Ru
d. η5-( C5H5)2 Co+
13. Structure of a carborane with formula, C2B4H8 is formally derived from
a. Closo-borane
b. Nido-borane☑️
c. Arachno-borane
d. Conjuncto-borane
14. Co4(CO)12 adopts the
a. closo-structure
b. nido-structure
c. arachno-structure
d. hypho-structure
15. According to Wade’s rule, anion C2B9H 12 adopts
a. nido-structure☑️
b. closo-structure
c. arachno-sturcture
d. hypho-structure
16. The total valence electron count and the structure type adopted by the complex [Fe5(CO)15C)] respectively are
a. 74 and nido☑️
b. 60 and closo
c. 84 and arachno
d. 62 and nido
17. The numbers of skeletal electrons present in the compounds C2B3H5, C2B4H6, and B5H9 respectively are,
a. 10, 12 and 12
b. 12, 14 and 14 ☑️
c. 10, 12 and 14
d. 12, 14 and 12
18. The STYX code of B4H10 is:
a. 4120 b. 4220 c. 4012☑️ d. 3203
19. Using wade’s rules predict the structure type of [C2B5H7].
a. nido b. closo☑️ c. arachno d. hypho
20. Which of the following options are correct for [Fe(CN)6]3– complex?
a. d2 sp3 hybridization
b. d2 sp3 hybridization
c. paramagnetic ☑️
d. diamagnetic
21. The term symbol for ground state is 4F the unpaired electron for this term symbol is
a. 2 b. 5 c. 4 d. 3☑️
22. How many micro state are arising from d2 case?
a. 15 b. 45☑️ c. 52 d. 18
23. The term symbol of d4 high spin electronic configuration is
a. 4F b. 5D☑️ c. 3F d. 4P
24. Which one is not a borane?
a. B5H9 b. B5H10☑️ c. B5H11 d. B6H10
25. How many bonding and lone paired electron in XeF2?
a. 2,3☑️ b. 3,2 c. 2,6 d. 6,2
26. Which of the following is a linear molecule?
a. H2O b. BeCl2☑️ c. SO2 d.CH4
27. Which of the following complexes does not obey the 18-electron rule?
a. [Fe (CO)5]
b. [Mn (CO)5]☑️
c. [Ni(CO)4]
d. [Cr (CO)6]
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