In This Post we are providing Chapter-9 Coordination Compounds NCERT MCQ for Class 12 Chemistry which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON COORDINATION COMPOUNDS
1. The sum of coordination number of oxidation number of the metal M in the complex [M(en)2 C204] Cl are
(a) 7
(b) 8
(c) 9
(d) 6
Answer: c
2. Which of the following will not give test for Cl– with AgNO3(aq) at 25°C?
(a) COCl3.5NH3
(b) COCl3.6NH3
(c) COCl3.3NH3
(d) COCl3.4NH3
Answer: c
3. Which of these statements about [Co(CN)6]3- is true?
(a) It has 4 unpaired electron, high spin
(b) No unpaired electron, high spin
(c) No unpaired electron, low spin
(d) 4 unpaired electron, low spin
Answer: c
4. The correct order of the stoichiometry’s of AgCl formed when AgNO3 in excess is treated with complexes: COCl3.6NH3, C0Cl3.5NH3, C0Cl3.4NH3 respectively is
(a) 3AgCl, lAgCl, 2AgCl
(b) 3AgCl, 2AgCl, 1AgCl
(c) 2AgCl, 3AgCl, 2AgCl
(d) lAgCl, 3AgCl, 2AgCl
Answer: b
5. Correct increasing order of wavelength of absorption in visible region for complex of Co3+ is
Answer: d
6. Pick out the correct statement with respect to [Mn(CN)J2-
(a) It is sp²d² hybridized, tetrahedral
(b) It is d²sp3 hybridized, octahedral
(c) It is dsp² hybridized, square planar
(d) It is sp3d² hybridized octahedral
Answer: b
7. Facial and meridional isomerism will be shown by
(a) [Co(NH3)3Cl3]
(b) [Co(NH3)4Cl2] Cl
(c) [Co(en)3] Cl3
(d) [Co(NH3)5Cl] Cl2
Answer: a
8. Which one has highest molar conductivity?
(a) [Pt(NH3)2 Cl2]
(b) [CO(NH3)4 Cl2] Cl
(c) K4[Fe(CN)6]
(d) [Cr(H2O)6] Cl3
Answer: c
9. Which one will show optical isomerism?
(a) [Co(NH3)3Cl3]
(b) cis-[Co(en)2 Cl2] Cl
(c) trans-[Co(en)2 Cl2] Cl
(d) [Co(NH3)4 Cl2] Cl
Answer: b
10. The pair having the same magnetic moment is (At No. Cr = 24, Mn = 25, Fe = 26, Co = 27)
(а) [Cr(H2O)6]2+ and [CoCl4]2-
(b) [Cr(H2O)6]2+ and [Fe (H2O)6]2+
(c) [Mn(H2O)6]2+ and[Cr(H2O)6]2+
(d) [COCl4]2- and [Fe(H2O)6]2+
Answer: b
11. On treatment of 100 mL of 0.1 MCOCl3.6H2O with excess of AgNO3, 1.2 × 1022 ions are precipitated. The complex is
(a) [Co(H2O)4Cl2]Cl.2H2O
(b) [Co(H2O)3Cl3]3H2O
(c) [Co(H2O)6] Cl3
(d) [Co(H2O)5 Cl] Cl2.H2O
Answer: d
12. Among the ligands NH3, en, CN and CO, the correct order of field strength is
(a) NH3 < en < CN– < CO
(b) CN– < NH3 < CO < en
(c) en < CN–< NH3 < CO
(d) CO < NH3 < en < CN–
Answer: a
13. Which of the following complexes formed by Cu2+ ions is most stable? 
Answer: b
14. The stabilization of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
(a) [Fe(CO)5]
(b) [Fe(CN)6]3-
(c) [Fe(C2O4)3]3-
(d) [Fe(H2O)6]3+
Answer: c
15. Indicate the complex ion which shows geometrical isomerism.
(a) [Cr(H2O)4Cl2]+
(b) [Pt(NH3)3 Cl]
(c) [Co(NH3)6]3+
(d) [Co(CN)5(NC)]3-
Answer: a
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