Chapter 20

Which of the following is a complex salt? (a) \(\mathrm{KCl} \cdot \mathrm{MgCl}_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O}\) (b) \(\mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\) (c) \(4 \mathrm{KCN} \cdot \mathrm{Fe}(\mathrm{CN})\) (d) \(\mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O}\)

The number of ions formed on dissolving one molecule of \(\mathrm{FeSO}_{4}\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O}\) are (a) 3 (b) 4 (c) 5 (d) 6

EDTA is a ....... ligand. (a) tetradentate (b) hexadentate (c) bidentate (d) tridentate

Diethylenetriamine is a (a) chelating agent (b) polydentate ligand (c) tridentate ligand (d) all of these

The correct name of the compound \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]\left(\mathrm{NO}_{3}\right)_{2}\) according to system is (a) tetraamminecopper(II) dinitrite (b) tetraamminecopper(II) nitrite (c) cuprammonium nitrate (d) tetramminecopper(II) nitrate

Which of the following complex species does not involve inner orbital hybridization? (a) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) (b) \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)

Pentaamminenitrocobalt (III) cation possesses the property of (a) physiosorption (b) chirality (c) linkage isomerism (d) versatile reducing agent

The anion \(\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}\) involves which type of hybridization? (a) \(\mathrm{d}^{2} \mathrm{sp}^{3}\) (b) sp \(^{3} \mathrm{~d}^{2}\) (c) \(\mathrm{d}^{3} \mathrm{sp}^{2}\) (d) \(\mathrm{sp}^{2} \mathrm{~d}^{3}\)

The correct IUPAC name of \(\mathrm{KAl}\left(\mathrm{SO}_{4}\right)_{2} .12 \mathrm{H}_{2} \mathrm{O}\) is (a) aluminium potassium sulphate-12-water (b) potassium aluminium(III) sulphate-12-water (c) potassium aluminium(III) sulphate hydrate (d) aluminium(III) potassium sulphate hydrate-12

Atomic numbers of \(\mathrm{Cr}\) and \(\mathrm{Fe}\) are respectively 25 and 26\. Which of the following is paramagnetic due to the spin of the electron? (a) \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) (b) \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) (c) \(\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]\) (d) \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4}\)

The hypothetical complex chlorodiaquatriammineco-balt (III) chloride can be presented as (a) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}\) (b) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]\) (c) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]\) (d) \(\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}\)

Which disease is cured by using Gold (I) thiomaleate as a medicine? (a) diabetes (b) ulcer (c) arthritis (d) malaria

Considering \(\mathrm{H}_{2} \mathrm{O}\) as a weak field ligand, the number of unpaired electrons in \(\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) will be (Atomic no of \(\mathrm{Mn}=25\) ) (a) 2 (b) 3 (c) 4 (d) 5

The complex used as an anti-cancer agent is (a) mer-[Co(NH \(\left.\left._{3}\right)_{3} \mathrm{Cl}_{3}\right]\) (b) \(\operatorname{cis}-\left[\mathrm{PtCl}_{2}\left(\mathrm{NH}_{3}\right)_{2}\right]\) (c) \(\mathrm{cis}-\mathrm{K}_{2}\left[\mathrm{PtCl}_{2} \mathrm{Br}_{2}\right]\) (d) \(\mathrm{Na}_{2} \mathrm{CoCl}_{4}\)

Which of the following is not considered as an oganometallic compound? (a) ferrocene (b) cisplatin (c) Grignard's reagent (d) zeise's salt

Which of the following does not have an optical isomer? (a) \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{3}\right]\) (b) \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right] \mathrm{Cl}\) (c) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3} \mathrm{Cl}_{3}\right]\) (d) \(\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right] \mathrm{Cl}\)

Among the following complex ions, the species containing \(\mathrm{Fe}^{3+}\) in strong ligand field is (a) \(\left[\mathrm{FeF}_{6}\right]^{3-}\) (b) \(\left[\mathrm{Fe}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\) (c) \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}\) (d) \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\)

Which one of the following is a correct representation of tetraamminecopper(II) hexacyanoferrate(II)? (a) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{2}\) (b) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{2}\) (c) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) (d) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right]_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\)

The complex compound used in the chemotherapy of cancer is (a) cis- \(\left[\mathrm{Pt}^{\mathrm{IV}}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{4}\right]\) (b) trans- \(\left[\mathrm{Pt}^{\mathrm{Il}}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]\) (c) cis- \(\left[\mathrm{Pt}^{\mathrm{IV}}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Cl}_{2}\) (d) cis- \(\left[\mathrm{Pt}^{\mathrm{H}}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]\)

An example of hexadentate ligand is (a) iminodiacetate ion (b) 2,2 'bipyridyl (c) dimethyl glyoxime (d) ethylene diamine tetraacetate ion

Haemoglobin, a complex containing iron is a const-ituent of blood. The oxidation state of iron in the complex is (a) \(+1\) (b) \(+2\) (c) \(+3\) (d) \(+4\)

The water soluble complex among the following is (a) \(\left[\mathrm{Ni}(\mathrm{HDMG})_{2} \mathrm{Cl}_{2}\right]\) (b) \(\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]\) (c) \(\left[\mathrm{Ni}(\mathrm{HDMG})_{2}\right]\) (d) \(\left[\mathrm{Pd}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]\)

The correct IUPAC name of \(\mathrm{AlCl}_{3}(\mathrm{EtOH})_{4}\) is (a) Aluminium (II) chloride-4-ethanol (b) Aluminium(III) chloride- 4 -ethanol (c) Aluminium(IV) chloride-4-hydroxy ethane (d) Aluminium chloride-4-ethanol

Which is not a pi-acceptor ligands among the following ligands \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{P}, \mathrm{NO}^{+}, \mathrm{CN}^{-}\)and \(\mathrm{I}_{3}^{-2}\) (a) \(\mathrm{CN}^{-}\) (b) \(\mathrm{I}_{3}-\) (c) \(\left(\mathrm{CH}_{3}\right)_{3} \mathrm{P}\) (d) \(\mathrm{NO}^{+}\)

The effective atomic number (EAN) of \({ }_{24} \mathrm{Cr}\) in \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{3}\) is (a) 24 (b) 27 (c) 30 (d) 33

The IUPAC name for \(\left[\mathrm{Be}_{4} \mathrm{O}\left(\mathrm{CH}_{3} \mathrm{COO}\right)_{6}\right]\) is (a) Basic beryllium acetate(II) (b) hexa-\mu-hexakis (acetato) beryllium(II) (c) hexa- \(\mu\)-acetato \(\left(\mathrm{O}, \mathrm{O}^{\prime}\right)-\mu_{4}\)-oxotetraberyllium(II) (d) hexaacetato- \(\mu\)-oxoberyllium(II)

The structure of iron pentacarbonyl is (a) square planar (b) trigonal bipyramid (c) triangular (d) none

The oxidation state of oxygen in \(\mathrm{O}_{2}\left[\mathrm{PtF}_{6}\right]\) is (a) \(-1 / 2\) (b) \(+2\) (c) \(+1 / 2\) (d) \(+1\)

A \(0.01 \mathrm{M}\) complex of \(\mathrm{CoCl}_{2}\) and \(\mathrm{NH}_{3}\) (molar ratio \(1: 4\) ) is found to have effective molarity of \(0.02 \mathrm{M}\) (evaluated from colligative property). What is the formula of the complex? (a) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4} \mathrm{Cl}_{2}\right] \mathrm{Cl}\) (b) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3} \mathrm{Cl}_{3}\right]\) (c) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{Cl}_{3}\) (d) \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{5} \mathrm{Cl}\right] \mathrm{Cl}\)

The correct IUPAC name of \(\mathrm{Mn}_{3}(\mathrm{CO})_{12}\) is (a) manganic dodecacarbonyl (0) (b) dodecacarbonyl trimanganese (0) (c) dodecacarbonyl manganic (II) (d) dodecacarbonyl manganate (0)

The IUPAC name for \(\mathrm{K}_{2}\left[\mathrm{OsCl}_{5} \mathrm{~N}\right]\) is (a) potassium pentachloroazidoosmate(VIII) (b) potassium pentachloroazidoosmate(VI) (c) potassium pentachloronitridoosmate(VI) (d) potassium nitroosmate(III)

Which of the following is an organometallic compound (a) lithium methoxide (b) lithium acetate (c) lithium dimethylamide (d) methyl lithium

The number of d electrons in \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) [atomic no. of \(\mathrm{Cr}=24]\) is (a) 2 (b) 3 (c) 4 (d) 5

Which one has the highest paramagnetism among the following ions? (a) \(\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}\) (b) \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\) (c) \(\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) (d) \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\)

The compound which does not show paramagnetism is (a) \(\left[\mathrm{Cu}\left(\mathrm{NH}_{3}\right)_{4}\right] \mathrm{Cl}_{2}\) (b) \(\left[\mathrm{Ag}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{Cl}^{2}\) (c) NO (d) \(\mathrm{NO}_{2}\)

According to IUPAC nomenclature sodium nitroprusside is named as (a) sodium pentacyanonitrosyl ferrate (II) (b) sodium pentacyanonitrosyl ferrate (III) (c) sodium nitroferriccyanide (d) sodium nitroferrocyanide

The correct name for the coordination compound, \(\left[\mathrm{Cr}(\mathrm{en})_{3}\right]\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]\) is (a) tris-(ethylenediamine) chromate(III) trioxalato-cobalt(III) (b) tris-(ethylenediamine) chromium(III)trioxalatoco-baltate (III) (c) tris-(ethylenediamine)chromate(III)trioxalatocobaltate(III) (d) tris-(ethylenediamine)chromaium(III)trioxalatocobalt(III)

The complex ion [Co (en) \(\left._{2} \mathrm{Cl}_{2}\right]^{+}\)exhibits (a) optical isomerism and linkage isomerism (b) cis-trans isomerism and optical isomerism (c) cis-trans isomerism and linkage isomerism (d) cis-trans isomerism only

Which of the following species has a square planar structure? (a) \(\left[\mathrm{SF}_{6}\right]\) (b) \(\left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}_{2}\right]\) (c) \(\left[\mathrm{BeF}_{4}\right]^{2-}\) (d) \(\left[\mathrm{Hg}\left(\mathrm{NH}_{3}\right)_{2}\right] \mathrm{Cl}_{2}\)

In the complex ion, \(\left.\left[\mathrm{Cr}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{2}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]\right]^{-}\), the oxida- tion number of \(\mathrm{Cr}\) is (a) \(+1\) (b) \(+2\) (c) \(+3\) (d) \(+4\)

The correct IUPAC name for the complex ion [CoCl \(\left.(\mathrm{ONO})(\mathrm{en})_{2}\right]^{+}\)is (a) bis(ethylenediamine)chloronitrito-O-cobalt (III) ion (b) bis(ethylenediamine)chloronitrito-O-cobaltate (III) ion (c) chlorodiethyldiamine nitrite-O-cobalt(III) ion (d) chlorodiethyl diamine nitrocobalt(III) ion

The IUPAC name for \(\left[\mathrm{Ru}\left(\mathrm{NH}_{3}\right)_{2}(\mathrm{en})\left(\mathrm{NO}_{3}\right)_{2}\right]\) is (a) diammine(ethylenediamine) nitratoruthenium(III) (b) diammine(ethylenediamine)ruthenium (II) nitrate (c) diamminebis(ethylenediamine) ruthenium(III) nitrate (d) (ethylenediamine) diamineruthenium(II)nitrate

Which one of the following is true? (a) The charge on the complex ion in \(\mathrm{K}_{2}\left[\mathrm{PtCl}_{4}\right]\) is \(+2\) (b) The coordination number of \(\mathrm{Hg}\) in \(\left[\mathrm{Hg}(\mathrm{en})_{2}\right]^{2+}\) is 4 (here en is ethylenediamine) (c) The oxidation number of iron in \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4}\) is \(+6\). (d) In transition metal complexes, ligands act as lewis acid

Optical isomerism is not shown by the complex (a) \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+}\)(cis-form) (b) \(\left[\mathrm{Cr}\left(\mathrm{en}_{3}\right)\right]^{3+}\) (c) \(\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]^{+}\)(trans- form) (d) \(\left[\operatorname{Cr}(o x)_{3}\right]^{3-}\)

\(\left[\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{2} \mathrm{~Pb}(\mathrm{SCN})_{2}\right]\) and \(\left[\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{2} \mathrm{~Pb}(\mathrm{NCS})_{2}\right]\) are (a) linkage isomers (b) coordination isomers (c) ionization isomers (d) geometrical isomer

Formula of ferrocene is (a) \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4}\) (b) \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3+}\) (c) \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\) (d) \(\left[\left(\mathrm{C}_{6} \mathrm{H}_{5}\right)_{2} \mathrm{Fe}\right]\)

The oxidation state of \(\mathrm{Mo}\) in its oxo-complex species \(\left[\mathrm{Mo}_{2} \mathrm{O}_{4}\left(\mathrm{C}_{2} \mathrm{H}_{4}\right)_{2}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right]^{2-}\) is (a) \(+2\) (b) \(+3\) (c) \(+4\) (d) \(+5\)

In photography, hypo is used in the reduction of (a) Ag from \(\mathrm{AgBr}\) (b) AgBr into \(\mathrm{Ag}_{2} \mathrm{SO}_{4}\) (c) AgBr into soluble thiosulphate complex (d) both (b) and (c)

In the silver plating of copper, \(\mathrm{K}\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]\) is used instead of \(\mathrm{AgNO}_{3} .\) The reason is (a) less availability of Ag+ ions, as Cu cannot displace Ag from \(\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]\) - ion (b) more voltage is required (c) a thin layer of \(\mathrm{Ag}\) is formed on \(\mathrm{Cu}\) (d) \(\mathrm{Ag}^{+}\)ions are completely removed from solution

Among the following complex ions, the one with the highest paramagnetism is (a) \(\left[\mathrm{FeF}_{6}\right]^{2+}\) (b) \(\left[\mathrm{Cu}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) (c) \(\left[\mathrm{Zn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}\) (d) \(\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\)