Case Study Questions for Class 12 Chemistry Chapter 9 Coordination Compounds

There is Case Study Questions in class 12 Chemistry in session 2020-21. For the first time, the board has introduced the case study questions in the board exam. The first two questions in the board exam question paper will be based on Case Study and Assertion & Reason. The first question will have 5 MCQs out of which students will have to attempt any 4 questions. The second question will carry 5 Assertion & Reason type questions with the choice to attempt any four. Here are the questions based on case study.

Case Study Question 1:

Read the passage given below and answer the following questions:

Coordination compounds are formulated and named according to the IUPAC system.

Few rules for naming coordination compounds are:

(I) In ionic complex, the cation is named first and then the anion.

(II) In the coordination entity, the ligands are named first and then the central metal ion.

(III) When more than one type of ligands are present, they are named in alphabetical order of preference with any consideration of charge

The following questions are multiple choice question. Choose the most appropriate answer:

(i) The IUPAC name of [Ni(CO)4] is
(a) tetracarbonylnickel(II)
(b) tetracarbonylnickel(0)
(c) tetracarbonylnickelate(II)
(d) tetracarbonylnickelate(0)

(ii) The IUPAC name of the complex [Pt(NH3)3Br(NO2)Cl]Cl is
(a) triamminechlorobromonitroplatinum(IV) chloride
(b) triamminebromonitrochloroplatinum(IV) chloride
(c) triamminebromidochloronitroplatinum(IV) chloride
(d) triamminenitrochlorobromoplatinum(IV) chloride

(iii) As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is
(a) tetraaquadiamminecobalt(II) chloride
(b) tetraaquadiamminecobalt(III) chloride
(c) diamminetetraaquacobalt(II) chloride
(d) diamminetetraaquacobalt(III) chloride

(iv) Which of the following represents correct formula of dichloridobis(ethane-1,2-diamine)cobalt(III) ion?
(a) [CoCl2(en)]2+
(b) [CoCl2(en)2]2+
(c) [CoCl2(en)]+
(d) [CoCl2(en)2]+

OR

Correct formula of pentaamminenitro-O-cobalt(III) sulphate is
(a) [Co(NO2)(NH3)5]SO4
(b) [Co(ONO)(NH3)5]SO4
(c) [Co(NO2)(NH3)4](SO4)2
(d) [Co(ONO)(NH3)4](SO4)2

Answers (i) b
(ii) c
(iii) d
(iv) d
or
b

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