MCQ 11 Mark
Which element from following forms a chlorophyll complex?
- AIron
- ✓Magnesium
- CCalcium
- DCobalt
Answer
View full question & answer→Correct option: B.
Magnesium
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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 $6.$