Direction (Q. Nos. 1-10) This section contains 10 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONLY ONE is correct.
Q.
According to IUPAC nomenclature, sodium nitroprusside is named as
Sodium nitroprusside reagent is Na2[Fe(CN)5NO]. In this compound, NO is present as NO+ and Fe has +2 charge. On this basis, the actual name should be sodium pentacyanonitrosyiiumferrate (II)
The formula of the complex hexamminecobalt (III) chloride sulphate is
The formula of complex hexamminecobalt (III) chloride sulphate is [Co(NH3)6]CISO4.
The IUPAC name of the compound [Cr(NH3)5(NCS)][ZnCI4] is
The lUPAC name of [Cr(NH3)5(NCS)][ZnCI4] is pentammine isothiocyanatochromium (III) tetrachlorozincate (II).
The IUPAC name of the complex [(CO)5Mn - Mn(CO)5] is
Decacarbonyldimanganese (0), Mn2(CO)10Mn2(CO)10 , is made up of two square pyramidal Mn(CO)5Mn(CO)5 units joined by a Mn-Mn bond.
The donor sites of EDTA ligand are
Ethylenediaminetetraacetate ion (EDTA)4- is an important hexadentate ligand. It can bind through two nitrogen and four oxygen atoms to a central metal ion.
The IUPAC name of [Ni(PPh3)2CI2]2+ is
The IUPAC name of [Ni(PPh3)CI2]2+ is dichloro triphenylphosphine nickel (II) ion.
Formula of brown ring complex is
The brown ring test for nitrates depend on the ability of Fe2+ to reduce nitrates to nitric oxide, which reacts with Fe2+ to form a brown coloured complex.
The IUPAC name of the compound K[SbCl5Ph] is
The IUPAC name of the compound K[SbCl5Ph] is potassium pentachloro(phenyl) antimonate (V).
K2[OsCI5N] is named as
Correct Answer : a
Explanation : K2[OsCI5N] is named as potassium pentachlorozoosmate(VI)
What is the IUPAC name of compound NaBH4?
The IUPAC name of NaBH4 is sodium tetrahydridoborate
Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.
Q.
Which of the following complexes have correct name?
Complexes K[Pt(NH3)Cl5] and [Ag(CN)2]- have been given their respective IUPAC names.
Which is/are the correctly named?
DMG (bidentate and neutral) is not named correctly, acac, bipy and gly have correct names respectively.
The correct name of ligand(s) in IUPAC name is/are
The correct name of ligand in IUPAC name are thiosulphate and cyclopentadienyl [(C5H5)-].
The ionisation isomer of [Cr(H2O)4Cl(NO2)Cl] is
The correct answer is Option B.
Ionization isomers are identical except that a ligand has exchanged places with anion or neutral molecule that was originally outside the coordination complex.
Thus, in Ionization isomerism the central ion and the other ligands are identical.
So, according to the definition, Cl-
is replaced by NO2-
in the ionization sphere.
[Cr(H2O)4Cl(NO2)Cl] ----> [Cr(H2O)4Cl(NO2)]+ + Cl-
[Cr(H2O)4Cl2]NO2 -----> [Cr(H2O)4Cl2]+ + NO2-
The ligand(s) which gives chelate complexes is/are
When a di or polydentate ligand used its two or more d onor atoms to bind a single metal ion. It is said to be a chelate ligand. The number of such ligating groups is called the denticity of the ligand. Such complexes are called chelate complex tend to be more stable than similar complexes containing unidentate ligands.
Comprehension Type
Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data, etc. Two questions have been related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).
Passage
In naming complexes, cation is named first followed by anion. Non-ionic or neutral complexes are given a one word name. The cationic and neutral complex ions are named by writing ‘the number and name of the ligands followed by the name of the central metal ion with its oxidation number in roman numerals within the parenthesis. If the complex is anionic, name of the metals ends with ‘ate’. When the complex contain two or more metal atoms linked with the help of bridging ligand then each bridging ligand is started with μ.
Q.
Name of [CoBr(NH3)4 NO2] is
The correct name of [CoBr(NH3)4NO2] is tetramminebromonitrocobalt (II).
In naming complexes, cation is named first followed by anion. Non-ionic or neutral complexes are given a one word name. The cationic and neutral complex ions are named by writing ‘the number and name of the ligands followed by the name of the central metal ion with its oxidation number in roman numerals within the parenthesis. If the complex is anionic, name of the metals ends with ‘ate’. When the complex contain two or more metal atoms linked with the help of bridging ligand then each bridging ligand is started with μ.
Q.
The IUPAC name of [Ni(NH3)4] [NiCI4] is
The IUPAC name of [Ni(NH3)4][NiCI4] is tetramminenickel (II) tetrachloronickelate (II).
Matching List Type
Direction (Q. Nos. 18 and 19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.
Q.
Match the Column I with Column II and mark the correct option from the codes given below.
(i) → (q,t), (ii) → (q ,s), (iii) → (r,t), (iv) → (p ,s)
Match the Column I with Column II and mark the correct option from the codes given below.
(i) → (q), (ii) → (p), (iii) → (s,t), (iv) → (r)
One Integer Value Correct Type
Direction (Q. Nos. 20-24) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).
Q. Ethylenediamminetetraacetate ion is a polydentate ligand and negatively charged. The magnitude of negative charge is
The correct answer is 4.
The oxidation state of the central metai in the complex ion [Fe(EDTA)]- .
In [Fe(EDTA)]-, Let the oxidation state is x then x - 4 = - 1 ⇒ x
The complex potassium dicyanodioxalatonickelate (II) in solution produce....... ions.
The structure of potassium dicyanodio xalatonickelate (II) is
K4[Ni(CN)2(ox)2].
K4[Ni(CN)2(ox)2] → 4K+ + [Ni(CN)2(ox)2]-
This produce 5 ions in solution.
Number of EDTA molecules required to form an octahedral complex.
EDTA is hexadentate ligand hence, its coordination number is 6.
The number of complexes in which iUPAC names contain metal name ending with ‘ate’
K[Co(EDTA)], [Pt(NH3)4]Br4, [Co(NO2)6]3-, [FeF6]3-, [Pt(en)CI2Br2] [Pt(en2)]2+, K[Co(EDTA) [Pt(py)4] [PtCI4]
Statement Type
Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.
Q.
Statement l : IUPAC name of the complex [(NH3)5—Cr—OH—Cr (NH3)5]CI5 is pentammine chromium-μ-hydroxopentammine chromium (III) chloride.
Statement II : IUPAC name of the complex [Ni(dmg)2] is bis (dimethylglyoximato) nickel (III).
[Ni(dmg)2] : bis (dimethylglyoximato) nickel (II)
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