MCQ 11 Mark
Which element from following forms a chlorophyll complex?
- AIron
- ✓Magnesium
- CCalcium
- DCobalt
Answer
View full question & answer→Correct option: B.
Magnesium
Questions
MCQ
Take a timed test
89 questions · 86 auto-graded MCQ + 3 self-marked written.
MCQ 21 Mark
Identify the type of hybridization involved in hexaamminecobalt (III) complex ion?
- A$sp ^3$
- ✓$d^2 s p^3$
- C$s p^3 d^2$
- D$d s p^2$
Answer
View full question & answer→Correct option: B.
$d^2 s p^3$
B
MCQ 31 Mark
What is the number of unpaired electrons in $\left[ Co \left( NH _3\right)_6\right]^{3+}$ complex?
- AFour
- ✓Zero
- CTwo
- DSix
Answer
View full question & answer→Correct option: B.
Zero
MCQ 41 Mark
What is the oxidation state of cobalt in a complex $\left[ Co \left( NH _3\right)_6\right]^{3+}$ ?
- A$6^{+}$
- B$2^{+}$
- ✓$3^{+}$
- D$4^{+}$
Answer
View full question & answer→Correct option: C.
$3^{+}$
MCQ 51 Mark
Which following pair of structure and magnetic properties is correct for tetracyanonickalate (II) ion?
- ASquare planar, paramagnetic
- ✓Square planar, diamagnetic
- CTetrahedral, paramagnetic
- DTetrahedral, diamagnetic
Answer
View full question & answer→Correct option: B.
Square planar, diamagnetic
B
MCQ 61 Mark
What type of geometry and magnetic nature is present in a complex $\left[ NiCl _4\right]^{2-}$ ?
- ✓Tetrahedral, Paramagnetic
- BSquare planar, diamagnetic
- CTetrahedral, diamagnetic
- DSquare planar, Paramagnetic
Answer
View full question & answer→Correct option: A.
Tetrahedral, Paramagnetic
MCQ 71 Mark
How many unpaired electrons are present in cobalt ion in +3 oxidation state prior to hybridization in $\left[ CoF _6\right]^{3+}$ complex ion ?
- ✓4
- B2
- C3
- D0
Answer
View full question & answer→Correct option: A.
4
A
MCQ 81 Mark
Identify a formula of coordinate complex Bis(ethylenediamine ) dithiocyanatoplatinum ( IV).
- ✓$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
- B$\left[ Pt _4\left( NH _3\right)_2( NCS )_2\right]$
- C$\left[ Pt \left( NH _3\right)_4\left( S _2 CN \right)\right]^{2+}$
- D$\left[ Pt ( en )_2( NCS )_2\right]^{4+}$
Answer
View full question & answer→Correct option: A.
$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
A
MCQ 91 Mark
Ideatify the number of unpaired electrons present and the geometry respectively of a complex $\left[ COF _6\right]^{3-}$ ( given atomic number $CO _0=27$ )
- A2 , trigonal bipyramidal
- B0 , Octahedral
- ✓4 , Octahedral
- D0 , trigonal bipyramidal
Answer
View full question & answer→Correct option: C.
4 , Octahedral
C
MCQ 101 Mark
Identify the type of isomerism exhibited by complex compounds. $\left[ Cr \left( H _2 O \right)_6\right] Cl _3$ and $\left[ Cr \left( H _2 O \right)_5 Cl _2 Cl _2 H _2 O \right.$
- ACoordination isomerism
- BLinkage isomerism
- CIonization isomerism
- ✓Solvate isomerism
Answer
View full question & answer→Correct option: D.
Solvate isomerism
MCQ 111 Mark
Identify the formula of Bis (ethylenediamine) dithiocynatoplatinum (iv).
- ✓$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
- B$Pt \left[( en )_2 S _2 CN \right]^{4-}$
- C$Pt \left[( en )_2 S _2 CN \right]^{4+}$
- D$\left[ Pt ( en )( SCN )_2\right]^{4-}$
Answer
View full question & answer→Correct option: A.
$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
A
MCQ 121 Mark
Which among the following complexes does NOT exhibit different geometrical isomers? ( $M=$ metal ion and $A, B, C=$ ligands)
- A$\left[ MA _4 B _2\right]$
- ✓$\left[ MA _6\right]$
- C$\left[ M ( AA )_2 B _2\right]$
- D$\left[ MA _4 BC \right]$
Answer
View full question & answer→Correct option: B.
$\left[ MA _6\right]$
B
MCQ 131 Mark
Identify cationic complex from following.
- ATriamminetrinitrocobalt (III)
- ✓Pentaamminechlorocobalt (II) sulphate
- CTetracyanonickelate (II) ion
- DTrioxalatocobaltate (III) ion
Answer
View full question & answer→Correct option: B.
Pentaamminechlorocobalt (II) sulphate
B
MCQ 141 Mark
What is the number of unpaired electrons of nickel observed in $\left[ Ni ( CN )_4\right]^{2-}$ ?
- ✓0
- B6
- C4
- D2
Answer
View full question & answer→Correct option: A.
0
A
MCQ 151 Mark
Which among the following cations forms a least stable complex if the ligand is same?
- A$Co ^{2+}$
- ✓$Cd ^{2+}$
- C$Ni ^{2+}$
- D$Fe ^{2+}$
Answer
View full question & answer→Correct option: B.
$Cd ^{2+}$
MCQ 161 Mark
What type of isomerism is exhibited by $\left[ Co \left( NH _3\right)_6\right]\left[ Cr ( CN )_6\right] \text { and }\left[ Cr \left( NH _3\right)_6\right]\left[ Co ( CN )_6\right] \text { ? }$
- Alonization isomerism
- ✓Coordination isomerism
- CSolvate isomerism
- DLinkage isomerism
Answer
View full question & answer→Correct option: B.
Coordination isomerism
MCQ 171 Mark
Which among the following cations forms a most stable complex with the same ligand?
- ✓$Co ^{2+}$
- B$Fe ^{2+}$
- C$Mn ^{2+}$
- D$Cd ^{2+}$
Answer
View full question & answer→Correct option: A.
$Co ^{2+}$
MCQ 181 Mark
Identify the geometry of complex formed when cobalt chloride is dissolved water.
- ATetrahedral
- ✓Octahedral
- CTrigonal bipyramidal
- DSquare planar
Answer
View full question & answer→Correct option: B.
Octahedral
MCQ 191 Mark
What is the number of unpaired electrons present in d orbitals of $\operatorname{Cr}(Z=24)$ to have extra stability?
- A4
- ✓5
- C1
- D0
Answer
View full question & answer→Correct option: B.
5
B
MCQ 201 Mark
Identify a ligand with single donor atom from following.
- ✓$OH ^{-}$
- B$\left( C _2 O _4\right)^{2-}$
- CSCN
- D$NO _2^{-}$
Answer
View full question & answer→Correct option: A.
$OH ^{-}$
A
MCQ 211 Mark
How many hybrid orbitals of cobalt ion are involved in formation of hexaammine cobalt (III) chloride complex?
- ✓6
- B3
- C2
- D4
Answer
View full question & answer→Correct option: A.
6
A
MCQ 221 Mark
The sum of coordination number and oxidation number of M in $\left[ M ( en )_2 C _2 O _4\right] Cl$ is
- A6
- B7
- ✓9
- D8
Answer
View full question & answer→Correct option: C.
9
9
MCQ 231 Mark
When an excess of AgNO3 is added to the complex one mole of AgCl is precipitated. The formula of the complex is ……………..
- ✓${\left[ CoCl 2\left( NH _3\right)_4\right] Cl }$
- B${\left[ CoCl \left( NH _3\right)_4\right] Cl _2}$
- C${\left[ CoCl _3\left( NH _3\right)_3\right]}$
- D${\left[ Co \left( NH _3\right)_4\right] Cl _3}$
Answer
View full question & answer→Correct option: A.
${\left[ CoCl 2\left( NH _3\right)_4\right] Cl }$
${\left[ CoCl 2\left( NH _3\right)_4\right] Cl }$
MCQ 241 Mark
On the basis of CFT predict the number of unpaired electrons in $\left[ CrF _6\right]^{3 \oplus}$.
- A1
- B2
- ✓3
- D4
Answer
View full question & answer→Correct option: C.
3
3
MCQ 251 Mark
Which of the following complexes are chiral?
1. $\left[ Co ( en )_2 Cl _2\right]^{\oplus}$
2. $\left[ Pt ( en ) Cl _2\right]$
3. $\left[ Cr \left( C _2 O _4\right)_3\right]^{3 \oplus}$
4. $\left[ Co \left( NH _3\right) 4 Cl _2\right]^{\oplus}$
1. $\left[ Co ( en )_2 Cl _2\right]^{\oplus}$
2. $\left[ Pt ( en ) Cl _2\right]$
3. $\left[ Cr \left( C _2 O _4\right)_3\right]^{3 \oplus}$
4. $\left[ Co \left( NH _3\right) 4 Cl _2\right]^{\oplus}$
- ✓1 and 3
- B2 and 3
- C1 and 4
- D2 and 4
Answer
View full question & answer→Correct option: A.
1 and 3
1 and 3
MCQ 261 Mark
Which of the following complexes exist as cis and trans isomers?
1. $\left[ Cr \left( NH _2\right)_2 Cl _4\right]^{\oplus}$
2. $\left[ Co \left( NH _3\right)_5 Br \right]^{2 \oplus}$
3. $\left[ PtCl _2 Br _2\right]^{2 \oplus}$ (square planar)
4. $\left[ FeCl _2\left( NCS _2\right]^{2 \oplus}\right.$ (tetrahedral)
1. $\left[ Cr \left( NH _2\right)_2 Cl _4\right]^{\oplus}$
2. $\left[ Co \left( NH _3\right)_5 Br \right]^{2 \oplus}$
3. $\left[ PtCl _2 Br _2\right]^{2 \oplus}$ (square planar)
4. $\left[ FeCl _2\left( NCS _2\right]^{2 \oplus}\right.$ (tetrahedral)
- ✓1 and 3
- B2 and 3
- C1 and 3
- D4 only
Answer
View full question & answer→Correct option: A.
1 and 3
1 and 3
MCQ 271 Mark
Formula for the compound sodium hexacynoferrate (III) is
- A$\left[ NaFe ( CN )_6\right]$
- B$Na _2\left[ Fe ( CN )_6\right]$
- C$Na \left[ Fe ( CN )_6\right]$
- ✓$Na _3\left[ Fe ( CN )_6\right]$
Answer
View full question & answer→Correct option: D.
$Na _3\left[ Fe ( CN )_6\right]$
$Na _3\left[ Fe ( CN )_6\right]$
MCQ 281 Mark
IUPAC name of the complex $\left[ Pt ( en )_2( SCN )_2\right]^{2+}$ is ..........
- ✓bis (ethylenediamine dithiocyanatoplatinum (IV) ion
- Bbis (ethylenediamine) dithiocyantoplatinate (IV) ion
- Cdicyanatobis (ethylenediamine) platinate IV ion
- Dbis (ethylenediammine)dithiocynato platinate (IV) ion
Answer
View full question & answer→Correct option: A.
bis (ethylenediamine dithiocyanatoplatinum (IV) ion
bis(ethylenediamine dithiocyanatoplatinum (IV) ion
MCQ 291 Mark
The oxidation state of cobalt ion in the complex $\left[ Co \left( NH _3\right)_5 Br \right] SO _4$ is.............
- A2
- ✓3
- C1
- D4
Answer
View full question & answer→Correct option: B.
3
3
MCQ 301 Mark
Identify monodentate ligand from following.
- ✓Cyanide ion
- BEthylenediamine
- COxalate ion
- DEthylenediaminetetraacetate
Answer
View full question & answer→Correct option: A.
Cyanide ion
(a) : $CN ^{-}$(cyanide ion) is monodentate ligand.
MCQ 311 Mark
Identify number of moles of donor atoms in $2 n$ mole of $SCN^-$ ?
- A$3 n$
- B$6 n$
- ✓$4 n$
- D$n$
Answer
View full question & answer→Correct option: C.
$4 n$
(c) : $SCN ^{-}$is an ambidentate ligand with two donor atoms $N$ and $S .2 n$ moles of $SCN ^{-}$will have $4 n$ moles of donor atoms.
MCQ 321 Mark
Identify neutral ligand from following.
- ✓Ammine
- BNitrato
- CCyano
- DChloro
Answer
View full question & answer→Correct option: A.
Ammine
(a) : Ammine $\left( NH _3\right)$ is a neutral ligand.
Cyano, nitrato and chloro are negatively charged ligands.
Cyano, nitrato and chloro are negatively charged ligands.
MCQ 331 Mark
Identify anionic sphere complex from following.
- AHexaamminecobalt(III) chloride
- ✓Potassium hexacyanoferrate(II)
- CTetraamminedichlorocobalt(III) ion
- DPentaamminechlorocobalt(III) sulphate
Answer
View full question & answer→Correct option: B.
Potassium hexacyanoferrate(II)
(b): The complex ion in anionic sphere complex carries a negative charge.
$
K _4\left[ Fe ( CN )_6\right] \rightleftharpoons 4 K ^{+}+\left[ Fe ( CN )_6\right]^{4-}
$
$
K _4\left[ Fe ( CN )_6\right] \rightleftharpoons 4 K ^{+}+\left[ Fe ( CN )_6\right]^{4-}
$
MCQ 341 Mark
Which coordination complex from following contains neutral ligand?
- ✓Pentacarbonyl iron(0)
- BTrioxalatocobaltate(III) ion
- CSodium hexanitrocobaltate(III)
- DTetracyanonickelate(II) ion
Answer
View full question & answer→Correct option: A.
Pentacarbonyl iron(0)
(a) : Carbonyl is a neutral ligand.
MCQ 351 Mark
What is coordination number of central metal ion in $\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}$ ?
- A3
- B5
- C4
- ✓6
Answer
View full question & answer→Correct option: D.
6
(d) : In $\left[ Fe \left( C _2 O _4\right)_3\right]^{3-}, Fe$ is coordinated to three oxalate ligands which are didentate in nature.
MCQ 361 Mark
Which from following formulae is of sodium hexanitrocobaltate(III)?
- A$Na _3\left[ Co \left( NO _2\right)_6\right]$
- B$Na _2\left[ Co \left( NO _2\right)_6\right]$
- C$\left[ Co \left( NaNO _2\right)_6\right]$
- D
Answer
No. of $\mathrm{Na}: x(+1)+3+6(-1)=0$
$\therefore \quad \mathrm{Na}_3\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]$ is the correct formula.
View full question & answer→(a): $\mathrm{Na}_x\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]$
No. of $\mathrm{Na}: x(+1)+3+6(-1)=0$
$x+3-6=0$ or $x=3$
$\therefore \quad \mathrm{Na}_3\left[\mathrm{Co}\left(\mathrm{NO}_2\right)_6\right]$ is the correct formula.
MCQ 371 Mark
Identify a formula of coordinate complex Bis(ethylenediamine)dithiocyanatoplatinum(IV).
- A
- B$\left[ Pt ( en )_2( NCS )_2\right]^{4+}$
- ✓
- D$\left[ Pt \left( NH _3\right)_4\left( S _2 CN \right)\right]^{2+}$
Answer
View full question & answer→Correct option: C.
(c) : The formula of the complex
bis(ethylenediamine)dithiocyanatoplatinum(IV) is
$
\left[ Pt ( en )_2( SCN )_2\right]^{2+} \text {. }
$
bis(ethylenediamine)dithiocyanatoplatinum(IV) is
$
\left[ Pt ( en )_2( SCN )_2\right]^{2+} \text {. }
$
MCQ 381 Mark
Identify the use of EDTA from following.
- ✓treatment of lead poisoning
- Belectroplating of noble metals
- Ctreatment for cancer
- Dtransmission of nerve signals.
Answer
View full question & answer→Correct option: A.
treatment of lead poisoning
(a): The complex of calcium with EDTA is used for the treatment of lead poisoning.
MCQ 391 Mark
What is the number of unpaired electrons of nickel observed in $\left[ Ni ( CN )_4\right]^{2-}$ ?
- ✓zero
- B2
- C6
- D4
Answer
View full question & answer→Correct option: A.
zero
(a) :
Hence the number of unpaired electrons in $Ni$ in $\left[ Ni ( CN )_4\right]^{2-}$ is zero.
Hence the number of unpaired electrons in $Ni$ in $\left[ Ni ( CN )_4\right]^{2-}$ is zero.
MCQ 401 Mark
Which among the following cations forms a least stable complex if the ligand is same?
- A$Fe ^{2+}$
- B$Ni ^{2+}$
- ✓$Cd ^{2+}$
- D$Co ^{2+}$
Answer
View full question & answer→Correct option: C.
$Cd ^{2+}$
(c) : For a given ligand, the stability of complexes of metallic ions having the same charge on them decreases with the increase of the size of the central metal ions.
MCQ 411 Mark
Identify the type of isomerism exhibited by complex compounds $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3$ and $\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_5 \mathrm{Cl}^2 \mathrm{Cl}_2 \mathrm{H}_2 \mathrm{O}\right.$.
- ACoordination isomerism
- ✓Solvate isomerism
- CLinkage isomerism
- DIonization isomerism
Answer
View full question & answer→Correct option: B.
Solvate isomerism
(b): This is an example of solvate isomerism. Solvate isomers differ by whether or not a solvent molecule is directly bonded to the metal ion or mainly present as free solvent molecules in the crystal lattice.
MCQ 421 Mark
Identify the formula of bis (ethylenediamine) dithiocyanatoplatinum(IV).
- A$Pt \left[( cm )_2 S _2 CN \right]^{4-}$
- B$Pt \left[(e n)_2 S _2 CN \right]^{4+}$
- C$\left[ Pt (e n)( SCN )_2\right]^{4-}$
- ✓$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
Answer
View full question & answer→Correct option: D.
$\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
(d) : $\left[ Pt ( en )_2( SCN )_2\right]^{2+}$
bis(ethylenediamine)dithiocyanatoplatinum(IV)
bis(ethylenediamine)dithiocyanatoplatinum(IV)
MCQ 431 Mark
The IUPAC name for $\left[( CO )_5 Mn - Mn ( CO )_5\right]$ is
- A
- Bbis(pentacarbonyl dimanganese)
- ✓
- D
Answer
View full question & answer→Correct option: C.
(c) : $\left[( CO )_5 Mn - Mn ( CO )_5\right]$ : $B i s($ pentacarbonyl manganese)
MCQ 441 Mark
Match the column $1$ with column $II$ and select the correct option.
| Column $I ($Pair of isomers$)$ | Column $II($Type of isomerism$)$ | ||
| $(p)$ | $\left.\begin{array}{l}\text { (I) }\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]\left[\mathrm{Cr}(\mathrm{CN})_6\right] \\ \text {(II) }\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]\left[\mathrm{Co}(\mathrm{CN})_6\right]\end{array}\right\}$ | $1.$ | Ionisation |
| $(q)$ | $\left.\begin{array}{l}\text { (III) }\left[\mathrm{PtCl}_2\left(\mathrm{NH}_3\right)_4\right] \mathrm{Br}_2 \\ \text { (IV) }\left[\mathrm{PtBr}_2\left(\mathrm{NH}_3\right)_4\right] \mathrm{Cl}_2\end{array}\right\}$ | $2.$ | Hydrate |
| $(r)$ | $\left.\begin{array}{l}\text { (V) }\left[\mathrm{Co}(\mathrm{SCN})\left(\mathrm{NH}_3\right)_5\right] \mathrm{Cl}_2 \\ \text {(VI) }\left[\mathrm{Co}(\mathrm{NCS})\left(\mathrm{NH}_3\right)_5\right] \mathrm{Cl}_2\end{array}\right\}$ | $3.$ | Coordination |
| $(s)$ | $\left.\begin{array}{l}(\mathrm{VII})\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3 \\ (\mathrm{VIII})\left[\mathrm{CrCl}_2\left(\mathrm{H}_2 \mathrm{O}\right)_4\right] \mathrm{Cl} \cdot 2 \mathrm{H}_2 \mathrm{O}\end{array}\right\}$ | $4.$ | Geometrical |
| $5.$ | Linkage | ||
- A$p -4, q -1, r -5, s -2$
- B$p-1, q-3, r-2,s-5$
- ✓$p-3, q-1,r-5, s-2$
- D$p-1, q-3, r-5, s-2$
Answer
View full question & answer→Correct option: C.
$p-3, q-1,r-5, s-2$
Compounds $\ce{(I)}$ and $\ce{(II)}$ both contain complex cation and anion, so they show coordination isomerism.
Compounds $\ce{(III)}$ and $\ce{(IV)}$ are obtained by the interchange of groups outside the coordination sphere and the ligands within the coordination sphere.
Therefore, they give different ions in the solution.
Hence, they show ionisation isomerism.
Compounds $\ce{(V)}$ and $\ce{(VI)}$ are linkage isomers, because the ambidentate ligand, $\mathrm{SCN}^{-}$has two donor atoms,
i.e., it has two possibilities of attachment $(-\ce{SCN}$ and $-\mathrm{NCS} )$ with the central metal.
Hence, they show linkage isomerism.
Compounds $\ce{(VII)}$ and $\ce{(VIII)}$ are obtained by the replacement of a coordinated group such as $\mathrm{Cl}^{-}$ by water of hydration.
Hence, they show hydrate isomerism.
Compounds $\ce{(III)}$ and $\ce{(IV)}$ are obtained by the interchange of groups outside the coordination sphere and the ligands within the coordination sphere.
Therefore, they give different ions in the solution.
Hence, they show ionisation isomerism.
Compounds $\ce{(V)}$ and $\ce{(VI)}$ are linkage isomers, because the ambidentate ligand, $\mathrm{SCN}^{-}$has two donor atoms,
i.e., it has two possibilities of attachment $(-\ce{SCN}$ and $-\mathrm{NCS} )$ with the central metal.
Hence, they show linkage isomerism.
Compounds $\ce{(VII)}$ and $\ce{(VIII)}$ are obtained by the replacement of a coordinated group such as $\mathrm{Cl}^{-}$ by water of hydration.
Hence, they show hydrate isomerism.
MCQ 451 Mark
Which among the following is used in the treatment of cancer?
- A$\operatorname{cis}-\left[ Pt (e n)_2 Cl _2\right]$
- ✓cis- $\left[ PtCl _2\left( NH _3\right)_2\right]$
- Ctrans- $\left[ Pt ( em )_2 Cl _2\right]$
- Dtrans- $\left[ P \left( NH _3\right)_2 Cl _2\right]$
Answer
View full question & answer→Correct option: B.
cis- $\left[ PtCl _2\left( NH _3\right)_2\right]$
(b) : The platinum complex cis- $\left[ Pt \left( NH _3\right)_2 Cl _2\right]$, known as cis-platin, is useful in the treatment of cancer.
MCQ 461 Mark
Which complex among the following gives a white precipitate on treatment with an aqueous solution of barium chloride?
- A$\left[ Pt \left( NH _3\right)_4 Br _2\right] Cl _2$
- B$\left[ Co \left( NH _3\right)_5 SO _4\right] NO _2$
- C$\left[ Co \left( NH _3\right)_5 NO _2\right] SO _4$
- D$\left.Pt \left( NH _3\right)_4 Cl _2\right] Br _2$
Answer
View full question & answer→(c):
$
\begin{aligned}
& {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right] \mathrm{SO}_4+\mathrm{BaCl}_2 \rightarrow} \\
& {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right] \mathrm{Cl}_2+\mathrm{BaSO}_4}
\end{aligned}
$
White ppt.
$
\begin{aligned}
& {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right] \mathrm{SO}_4+\mathrm{BaCl}_2 \rightarrow} \\
& {\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{NO}_2\right] \mathrm{Cl}_2+\mathrm{BaSO}_4}
\end{aligned}
$
White ppt.
MCQ 471 Mark
Which among the following is a neutral complex?
- A$\left[ Fe \left( H _2 O \right)_6\right] Cl _3$
- B$\left[ Ni \left( NH _3\right)_6\right] Cl _2$
- ✓$\left[ Pt \left( NH _3\right)_2 Cl _2\right]$
- D$K \left[ Ag ( CN )_2\right]$
Answer
View full question & answer→Correct option: C.
$\left[ Pt \left( NH _3\right)_2 Cl _2\right]$
(c) $\left[ Pt \left( NH _3\right)_2 Cl _2\right]$
MCQ 481 Mark
According to Werner's theory, the geometry of the comples is determined by
- Aonly from the primary valence in space
- Bnumber and position of the primary valencies in space
- ✓number and position of the secondary valencies in space
- Donly from the position of secondary valence in space.
Answer
View full question & answer→Correct option: C.
number and position of the secondary valencies in space
(c): The ligands satisfying secondary valencies are always directed towards fixed positions in space thereby giving a definite geometry to the complex but the primary valencies are non-directional.
MCQ 491 Mark
What is the number of donor atoms in dimethylglyoximato ligand?
- A
- ✓2
- C3
- D4
Answer
View full question & answer→Correct option: B.
2
(b) :
MCQ 501 Mark
The correct charge on and co$-$ordination number of $'Fe\ '$ in $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ is
- A$+2,4$
- ✓$+3,6$
- C$+2,6$
- D$+3,3$
Answer
View full question & answer→Correct option: B.
$+3,6$
$(b) :$ Let oxidation state of $Fe$ in $\ce{K_3\left[Fe(CN)_6\right]}$ be $x$.
$x+6 \times(-1)=-3$
$x=-3+6=+3$
Co$-$ordination number of $Fe$ in this complex is $6.$
$x+6 \times(-1)=-3$
$x=-3+6=+3$
Co$-$ordination number of $Fe$ in this complex is $6.$
MCQ 511 Mark
Which of following coordinate complexes is an exception to EAN rule?(Given At. $\mathrm{No} . \mathrm{Pt}=78, \mathrm{Fe}=26, \mathrm{Zn}=30, \mathrm{Cu}=29$ )
- A
- B
- C
- ✓
Answer
View full question & answer→Correct option: D.
(d) : EAN = Atomic number of central atom $+ No$ of electrons donated by ligands - Oxidation state of central atom
(a) $\left[ Pt \left( NH _3\right)_6\right]^{4+} ; EAN =78+2 \times 6-4=86$
(b) $\left[ Fe ( CN )_6\right]^{4-} ; EAN =26+1 \times 6+4=36$
(c) $\left[ Zn \left( NH _3\right)_4\right]^{2+} ; EAN =30+2 \times 4-2=36$
(d) $\left[ Cu \left( NH _3\right)_4\right]^{2+} ; EAN =29+2 \times 4-2=35$
(a) $\left[ Pt \left( NH _3\right)_6\right]^{4+} ; EAN =78+2 \times 6-4=86$
(b) $\left[ Fe ( CN )_6\right]^{4-} ; EAN =26+1 \times 6+4=36$
(c) $\left[ Zn \left( NH _3\right)_4\right]^{2+} ; EAN =30+2 \times 4-2=36$
(d) $\left[ Cu \left( NH _3\right)_4\right]^{2+} ; EAN =29+2 \times 4-2=35$
MCQ 521 Mark
Which of the following is a neutral complex?
- ✓
- B
- C
- D
Answer
View full question & answer→Correct option: A.
(a) : A complex carrying no net charge is called a neutral complex. $\left[ Pt \left( NH _3\right)_2 Cl _2\right]$ is a neutral complex. $\left[ Co \left( NH _3\right)_6\right] Cl _3$ and $\left[ Ni \left( NH _3\right)_6\right] Cl _2$ are cationic complexes while $K _4\left[ Fe ( CN )_6\right]$ is an anionic complex.
MCQ 531 Mark
The molecular formula of Wilkinson catalyst, used in hydrogenation of alkenes is
- A
- ✓
- C$\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
- D
Answer
View full question & answer→Correct option: B.
(b) : Rhodium complex, $\left[\left( Ph _3 P \right)_3 RhCl \right]$, Wilkinson catalyst, is used for the hydrogenation of alkenes.
MCQ 541 Mark
$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]\left[\mathrm{Cr}(\mathrm{SCN})_6\right] \quad$ and $\quad\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_2(\mathrm{SCN})_4\right]$ $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4(\mathrm{SCN})_2\right]$ are the examples of what type of isomerism?
- A
- B
- ✓
- D
Answer
View full question & answer→Correct option: C.
(c) : Coordination isomerism is shown by compounds in which both cations as well as anions are complexes and ligands interchange their positions between two complex ions.
MCQ 551 Mark
The correct IUPAC name of $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3\left(\mathrm{NO}_2\right)_3\right]$ is
- ✓
- Btriamminetrinitrito-N-cobalt(II)
- Ctriamminecobalt(III) nitrite
- Dtriamminetrinitrito-N-cobaltate(III).
MCQ 561 Mark
Select the diamagetic complex ion amongst the followig complexes. (Atomic no. $Fe =26, Co =27$ )
- A$\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$
- ✓$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
- C$\mathrm{K}_3\left[\mathrm{FeF}_6\right]$
- D$\mathrm{K}_3\left[\mathrm{CoF}_6\right]$
Answer
View full question & answer→Correct option: B.
$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$
(b) :
| Complex | Metal ion | outer confign. | No. of unpaired $e^{-} \mathrm{s}$ |
| $\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{CN})_6\right]$ | $\mathrm{Fe}^{3+}$ |  | 1 |
| $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ | $\mathrm{Co}^{3+}$ |  | 0 (Diamagnetic) |
| $\mathrm{K}_3\left[\mathrm{FeF}_6\right]$ | $\mathrm{Fe}^{3+}$ |  | 5 |
| $\mathrm{K}_3\left[\mathrm{CoF}_6\right]$ | $\mathrm{Co}^{3+}$ |  | 4 |
MCQ 571 Mark
Which of the following complexes has lowest molar conductance?
- ✓
- B
- C
- D
Answer
View full question & answer→Correct option: A.
(a) :
| Mol. formula | Moles of $Agcl$ percipitated | Total no. of ions | Structural formula |
| $\mathrm{CoCl}_3 \cdot 3 \mathrm{NH}_3$ | 0 | - | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_3 \mathrm{Cl}_3\right]$ |
| $\mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3$ | 1 | 2 | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$ |
| $\mathrm{CoCl}_3 \cdot 5 \mathrm{NH}_3$ | 2 | 3 | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_5 \mathrm{Cl}\right] \mathrm{Cl}_2$ |
| $\mathrm{CoCl}_3 \cdot 6 \mathrm{NH}_3$ | 3 | 4 | $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$ |
MCQ 581 Mark
Cisplatin compound is used in the treatment of
- Amalaria
- ✓cancer
- CAIDS
- Dyellow fever
Answer
View full question & answer→Correct option: B.
cancer
cancer
MCQ 591 Mark
What is effective atomic number of $Fe ( z =26)$ in $\left[ Fe ( CN )_6\right]^{4-}$ ?
- A12
- B30
- C26
- ✓36
Answer
View full question & answer→Correct option: D.
36
36
MCQ 601 Mark
Which of the following complexes will give a white precipitate on treatment with a solution of barium nitrate?
- A$\left[ Cr \left( NH _3\right)_4 SO _4\right] Cl$
- B$\left[ CO \left( NH _3\right)_4 Cl _2\right] NO _2$
- ✓$\left[ Cr \left( NH _3\right)_4 Cl _2\right] SO _4$
- D$\left[ CrCl _3\left( H _2 O \right)_4\right] Cl$
Answer
View full question & answer→Correct option: C.
$\left[ Cr \left( NH _3\right)_4 Cl _2\right] SO _4$
$\left[ Cr \left( NH _3\right)_4 Cl _2\right] SO _4$
MCQ 611 Mark
Ligand used in the estimation of hardness of water is
- ✓EDTA
- BDBG
- Cchloride
- Dbromo
Answer
View full question & answer→Correct option: A.
EDTA
EDTA
MCQ 621 Mark
The number of unpaired electrons in a high spin octahedral complex ion of $d ^7$ is
- A$0$
- B1
- C2
- ✓3
Answer
View full question & answer→Correct option: D.
3
3
MCQ 631 Mark
The number of unpaired electrons in a low spin octahedral complex ion of d1 is
- A$0$
- ✓1
- C2
- D3
Answer
View full question & answer→Correct option: B.
1
1
MCQ 641 Mark
Among the following complexes, the highest magnitude of crystal field stabilisation energy will be for $\left[ Co \left( H _2 O \right)_6\right]^{3+},\left[ CO ( CN )_6\right]^{3-},\left[ Co \left( NH _3\right)_6\right]^{3+},\left[ CoF _6\right]^{3-}$
- A$\left[ Co \left( H _2 O \right)_6\right]^{3+}$
- ✓$\left[ CO ( CN )_6\right]^{3-}$
- C$\left[ Co \left( NH _3\right)_6\right]^{3+}$
- D$\left[ CoF _6\right]^{3-}$
Answer
View full question & answer→Correct option: B.
$\left[ CO ( CN )_6\right]^{3-}$
$\left[ CO ( CN )_6\right]^{3-}$
MCQ 651 Mark
The number of unpaired electrons in $[ NiClJ 2-$ and $[ Ni ( CN ) 4] 2$ _ are respectively,
- A2, 2
- ✓2, 0
- C0, 0
- D1, 2
Answer
View full question & answer→Correct option: B.
2, 0
2, 0
MCQ 661 Mark
The number of unpaired electrons in [CO(NH3)6]3+ is
- A$0$
- B1
- C2
- D4
Answer
View full question & answer→0
MCQ 671 Mark
Inner complex has hybridisation,
- ✓$d^2 s p^3$
- B$s p^3 d^2$
- C$s p^3 d$
- D$sp ^3 d ^3$
Answer
View full question & answer→Correct option: A.
$d^2 s p^3$
$d^2 s p^3$
MCQ 681 Mark
Octahedral complex has hybridisation,
- A$dsp { }^2$
- B$d^3 s p^3$
- C$dsp ^3$
- ✓$d^2 s p^3$
Answer
View full question & answer→Correct option: D.
$d^2 s p^3$
$d^2 s p^3$
MCQ 691 Mark
If Z is the atomic number of a metal, X is number of electrons lost forming metal ion and Y is the number of electrons from the ligands then EAN is
- A$Z+X+Y$
- B$X-Z+Y$
- ✓$Z-X+Y$
- D$X+Z-Y$
Answer
View full question & answer→Correct option: C.
$Z-X+Y$
$Z-X+Y$
MCQ 701 Mark
The cationic complex among the following is
- A$K _3\left[ Fe ( CN )_6\right]$
- B$Ni ( CO )_4$
- C$K _2 Hgl _4$
- ✓$\left[ CO \left( NH _3\right)_6\right] Cl _2$
Answer
View full question & answer→Correct option: D.
$\left[ CO \left( NH _3\right)_6\right] Cl _2$
$\left[ CO \left( NH _3\right)_6\right] Cl _2$
MCQ 711 Mark
EDTA is a ligand of the type
- Abidentate
- Btridentate
- Ctetradentate
- ✓hexadentate
Answer
View full question & answer→Correct option: D.
hexadentate
hexadentate
MCQ 721 Mark
The complex which violates EAN rule is
- A$Fe ( CO )_5$
- ✓$\left[ Fe ( CN )_6\right]^{3-}$
- C$Ni ( CO )_4$
- D$\left[ Zn \left( NH _3\right)_4\right] Cl _2$
Answer
View full question & answer→Correct option: B.
$\left[ Fe ( CN )_6\right]^{3-}$
$\left[ Fe ( CN )_6\right]^{3-}$
MCQ 731 Mark
Magnetic moment of (NH4)2 (MnBr4) is BM
- ✓$5.91$
- B$4.91$
- C$3.91$
- D$2.91$
Answer
View full question & answer→Correct option: A.
$5.91$
$5.91$
MCQ 741 Mark
The strongest ligand in the following is
- ✓$CN ^{-}$
- B$Br ^{-}$
- C$HO ^{-}$
- D$F ^{-}$
Answer
View full question & answer→Correct option: A.
$CN ^{-}$
$CN ^{-}$
MCQ 751 Mark
Among $[ Ni ( Co ) J ,[ Ni ( CN ) 4] 2 A [ NiClJ 2-$ Species, the hybridisation states at the Nickel atom are respectively
- ✓$s p^3, d s p^2, s p^3$
- B$sp ^3, d s p^2, d s p^2$
- C$d s p^2, s p^3, s p^3$
- D$sp ^3, sp ^3, dsp ^2$
Answer
View full question & answer→Correct option: A.
$s p^3, d s p^2, s p^3$
$s p^3, d s p^2, s p^3$
MCQ 761 Mark
Which one of the following is an inner orbital complex as well as diamagnetic in behaviour (Atomic no. $Zn =30, Cr =24, Co =27, Ni =28$ )
- A$\left[ Zn \left( NH _3\right)_6\right]^{2+}$
- B$\left[ Cr \left( NH _3\right)_6\right]^{3+}$
- ✓$\left[ CO \left( NH _3\right)_6\right]^{3+}$
- D$\left[ Ni \left( NH _3\right)_6\right]^{2+}$
Answer
View full question & answer→Correct option: C.
$\left[ CO \left( NH _3\right)_6\right]^{3+}$
$\left[ CO \left( NH _3\right)_6\right]^{3+}$
MCQ 771 Mark
The dimagnetic species is
- ✓$\left[ Ni ( CN )_4\right]^{2-}$
- B$\left[ NiCl _4\right]^{2-}$
- C$\left[ CoCl _4\right]^{2-}$
- D$\left[ CoF _6\right]^{2-}$
Answer
View full question & answer→Correct option: A.
$\left[ Ni ( CN )_4\right]^{2-}$
$\left[ Ni ( CN )_4\right]^{2-}$
MCQ 781 Mark
The number of ions produced by the complex $\left[ CO \left( NH _3\right)_4 Cl _2\right] Cl$ is
- A1
- ✓2
- C3
- D4
Answer
View full question & answer→Correct option: B.
2
2
MCQ 791 Mark
The IUPAC name of $\left[ Ni ( Co )_4\right]$ is
- ✓tetra carbonyl nickel (O)
- Btetra carbonyl nickel (II)
- Ctetra carbonyl nickelate (O)
- Dtetra carbonyl nickelate (II)
Answer
View full question & answer→Correct option: A.
tetra carbonyl nickel (O)
tetra carbonyl nickel (O)
MCQ 801 Mark
$\left[ CO \left( NH _3\right)_6\right]^{3+}$ is an orbital complex and is in nature.
- Ainner, paramagnetic
- ✓inner, dimagnetic
- Couter, paramagnetic
- Douter, dimagnetic
Answer
View full question & answer→Correct option: B.
inner, dimagnetic
inner, dimagnetic
MCQ 811 Mark
The complex cis- $\left[ Pt \left( NH _3\right)_2 Cl _2\right]$ is used in treatment of cancer under the name.
- AAspirin
- BEqanil
- ✓cisplatin
- Dtransplatin
Answer
View full question & answer→Correct option: C.
cisplatin
cisplatin
MCQ 821 Mark
The geometry of $\left[ Ni ( CN )_4\right]^{3-}$ and $\left[ NiCl _4\right]^{-2}$ are
- Aboth tetrahedral
- Bboth square planar
- Ctetrahedral and square planar respectively
- ✓square planar and tetrahedral respectively
Answer
View full question & answer→Correct option: D.
square planar and tetrahedral respectively
square planar and tetrahedral respectively
MCQ 831 Mark
Amongst the following ions which one has the highest paramagnetism?
- A$\left[ Cr \left( H _2 O \right)_6\right]^{3+}$
- ✓$\left[ Fe \left( H _2 O \right)_6\right]^{2+}$
- C$\left[ CU \left( H _2 O \right)_6\right]^{2+}$
- D$\left[ Zn \left( H _2 O \right)_6\right]^{2+}$
Answer
View full question & answer→Correct option: B.
$\left[ Fe \left( H _2 O \right)_6\right]^{2+}$
$\left[ Fe \left( H _2 O \right)_6\right]^{2+}$
MCQ 841 Mark
The correct structure of $\left[ Cr \left( H _2 O \right)_6\right]^{3+}$ is ………………………………..
- Aoctahedral
- ✓tetrahedral
- Csquare pyramidal
- Dtrigonal bipyramidal
Answer
View full question & answer→Correct option: B.
tetrahedral
tetrahedral
MCQ 851 Mark
Oxidation number of cobalt in $K \left[ COCl _4\right]$ is
- A$+1$
- ✓$-1$
- C$+3$
- D$-3$
Answer
View full question & answer→Correct option: B.
$-1$
$-1$
MCQ 861 Mark
Which of the following compounds can exhibit linkage isomerism?
- A$\left[ Co ( en )_3\right] Cl _3$
- B$\left[ Co ( en )_2 Cl _2\right] Cl$
- ✓$\left[ Co ( en )_2 NO _2 Br \right] Cl$
- D$\left[ Co \left( NH _3\right)_5 Cl \right] Br _2$
Answer
View full question & answer→Correct option: C.
$\left[ Co ( en )_2 NO _2 Br \right] Cl$
$\left[ Co ( en )_2 NO _2 Br \right] Cl$
MCQ 871 Mark
Which one of the following compounds can exhibit coordination isomerism?
- A$\left[ Co ( en )_2 Cl _2\right] Br$
- ✓$\left[ CO \left( NH _3\right)_6\right]\left[ Cr ( CN )_6\right]$
- C$\left[ Co ( en )_3\right] Cl _3$
- D$\left[ CO \left( NH _3\right)_5 NO _2\right] Cl _2$
Answer
View full question & answer→Correct option: B.
$\left[ CO \left( NH _3\right)_6\right]\left[ Cr ( CN )_6\right]$
$\left[ CO \left( NH _3\right)_6\right]\left[ Cr ( CN )_6\right]$
MCQ 881 Mark
EDTA combines with cations to form
- ✓chelates
- Bpolymers
- Cclathrates
- Dnon-stoichiometric compounds
Answer
View full question & answer→Correct option: A.
chelates
chelates
MCQ 891 Mark
The coordination number of cobalt in the complex $\left[ Co ( en )_2 Br _2\right] Cl _2$ is
- A4
- B5
- ✓6
- D7
Answer
View full question & answer→Correct option: C.
6
6