InterviewSolution
Saved Bookmarks
InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
out of the following complexes, which is diamagenitic in nature ?A. `[NiCl_(4)]^(2-)`B. `[Ni(CN)_(4)]^(2-)`C. `[CuCl_(4)]^(2-)`D. `[CoF_(6)]^(3-)` |
|
Answer» Correct Answer - B Only `CN^(-)` ion is a strong field ligand . It will cause electron pairing resulting in a diamagnetic complex. All other ligands are weak field ligands and cannot cause any electron pairing. |
|
| 102. |
In aqueous solution `Cr^(2+)` is stronger reducing agent than `Fe^(2+)`. This is becauseA. `Cr^(2+)` ion is more stable than `Fe^(2+)`B. `Cr^(3+)` ion with `d^(3)` configuraion has favourable crystal field stabilisation energyC. `Cr^(3+)` has half-filled configuration and hence more stableD. `Fe^(3+)` in aqueous solution more stable than `Cr^(3+)` |
|
Answer» Correct Answer - B `Cr^(3+)` ions with `d^(3)(t_(2g)^(3))` configuration has favourable crystal field stabilisation atomic energy. |
|
| 103. |
Which of the following is a pair of diamagnetic complexes ?A. `[Co(NH_(3))_(6)]^(3+) , [Fe(CN)_(6)]^(4-)`B. `[Co(ox)_(3)]^(3-) , [FeF_(6)]^(3-)`C. `[Fe(ox)_(3)]^(3-) , [FeF_(6)]^(3-)`D. `[Fe(CN)_(6)]^(3-) , [CoF_(6)]^(3-)` |
|
Answer» Correct Answer - A `[CO(NH_3)_6]^(3-)` and `[Fe(CN)_6]^(4-)` are pair of diamagnetic complexes. |
|
| 104. |
The structure of diamagnetic nickel complex , `` is :A. triagonal bipyramidalB. tetrahedralC. square planarD. distorted octahedral |
|
Answer» Correct Answer - C Molar mass of AgCl = 143.5 g`mol^(-)` No . Of moles of AgCl precipitated = `(4.305 g) / (143.4 gmol^(-))` = 0.03 mol 0.01 mole of complex precipitates AgCl = 0.03 mol 1.0 mole of complex precipitates AgCl = 3 mol This means that the complex provides three `Cl^(-)` ions in solution. `therefore` Formula of complex = `[Co(NH_(3))_(6)]Cl_(3)` |
|
| 105. |
Among the following, the compound that is both paramagnetic and coloured is :-A. `K_(2)Cr_(2)O_(7)`B. `(NH_(4))_(2)[TiCl_(6)]`C. `VOSO_(4)`D. `K_(3)[Cu(CO)_(4)]` |
| Answer» Correct Answer - B | |
| 106. |
Of the following complex ions, which is diamagnetic in natures?A. `[CuCl_(4)]^(2-)`B. `[CoF_(6)]^(3-)`C. `[NiCl_(4)]^(2-)`D. `[Ni(CN)_(4)]^(2-)` |
| Answer» Correct Answer - D | |
| 107. |
Which of the following complexes are paramagnetic in nature ?A. `[Fe(CN)_(6)]^(3-)`B. `[Fe(CN)_(6)]^(4-)`C. `[C_(0)F_(6)]^(3-)`D. `Ni(CO)_(4)` |
|
Answer» Correct Answer - a,c (a,c) are both paramagnetic in nature. |
|
| 108. |
Is aluminium isopropoxide an organometallic compound? |
| Answer» `[(CH_(3))_(2)CHO]_(3)Al` is not an organometallic compound because in it the oxygen atoms and not carbon atoms are linked to the central Al atom. | |
| 109. |
Which of the following is not an example of organometallic compound?A. trimethylboronB. trimethylaluminiumC. trimethoxytitanium chlorideD. tetracarbonylnickel |
|
Answer» Correct Answer - C No metal carbon bond is present in trimethoxy titanium chloride. |
|
| 110. |
One among the following is not an organometallic compoundA. trimethylboronB. trimethylorthoborateC. diethylmagnesiumD. butylethylmercury. |
|
Answer» Correct Answer - B Trimethylorthoborate `B(OCH_(3))_(3)` is not an orgnaometallic compound. |
|
| 111. |
The valency of `Cr` in the complex `[Cr(H_(2)O)_(4)Cl_(2)]^(+)`A. 1B. 3C. 5D. 6 |
|
Answer» Correct Answer - B Let O.S. of Cr in `[Cr(H_(2)O)_(4)Cl_(2)]^(+) is x` O.S. of `H_(2)O` = `0, O.S. of Cl = -1` `:.x+4xx0+(-1)=+1` x = `+3` |
|
| 112. |
A square planar complex is formed by hybridisation of which atomic orbitals?A. s, px, py, `d_(yz)`B. `s, px,py,d_(x^(2)-y^(2))`C. s, `p_(x)`, `p_(y)`, `d_(z2)`D. `s,p_(y), p_(z), d_(xy)` |
|
Answer» Correct Answer - B The hybridisation is `dsp^(2)` in which `dx^(2)-y^(2)` orbital participated. |
|
| 113. |
`[Ni(CN)_(4)]^(2-)` and `[Ni(CO)_(4)]` haveA. `sp^(3)` hybridised Ni in both casesB. `sp^(3)` and `sp^((3)d` hybridised NiC. `dsp^(2)` and `sp^(3)` hybridised NiD. `dsp^(2)` hybridised Ni in both cases . |
|
Answer» Correct Answer - C c) is the correct answer. |
|
| 114. |
`Fe_(2)(CO)_(9)` is diamagnetic. Which of the following reasons is correct?A. Presence of one CO as bridge groupB. Presence of monodentate ligandC. Metal -metal (Fe-Fe) bond in moleculeD. Resonance hybridization of CO. |
|
Answer» Correct Answer - C Metal -Metal `(Fe-Fe)` bond pair up the unpaired electron. |
|
| 115. |
The diamagnetic species isA. `[Ni(CN)_(4)]^(2-)`B. `[NiCl_(4)]^(2-)`C. `[CoCl_(4)]^(2-)`D. `[CoF_(6)]^(2-)` |
|
Answer» Correct Answer - A `CN^(-)` is a straght ligand where as `Cl^(-) and F^(-)` are weak ligands . Hence, electrons in `|Ni(CN)_(4)|^(2-)` pair up and it is diamagnetic. |
|
| 116. |
Which of the following is correct value of n in `Cr(CO)_(n)` ?A. 2B. 4C. 6D. Unpredictable. |
|
Answer» Correct Answer - C Following EAN rule the value of n should be 6. |
|
| 117. |
The complexes `[Co(NH_(3))_(6)][Cr(CN)_(6)]` and `[Cr(NH_(3))_(6)][Co(CN)_(6)]` are the examples of which type of isomerism ?A. linkage isomersB. ionisatioin isomersC. co-ordinate isomersD. none of these |
|
Answer» Correct Answer - C pair represents co-ordination isomers. |
|
| 118. |
The complexes `[Co(NH_(3))_(6)][C(CN)_(6)]` and `[Cr(NH_(3))_(6)][Co(CN)_(6)]` are the examples of which type of isomerism ?A. Coordination isomerismB. Geometrical isomerismC. Linkage isomerismD. Ioniziation isomerism |
| Answer» Correct Answer - A | |
| 119. |
Which of the following is a `pi`-acid ligand?A. `NH_(3)`B. COC. `F^(-)`D. ethylenediamine. |
| Answer» Carbon monoxide, CO is a `pi`-acid ligand . | |
| 120. |
The number of CO ligands that can be attached to Fe(Z=26) on the basis of E.A.N. theory areA. 5B. 6C. 10D. 12 |
|
Answer» At . No.of Fe = 26 At. No. of next noble gas = 36 (Kr) `:.` Number of electrons to be provided by ligands = 36-26=10 As each CO provides two electrons, no of CO ligands = `10div 2 =5` |
|
| 121. |
A compound `CO(en)_(2)NO_(2)Cl` has been prepared in a number of isomeric form . One form undergoes no reaction with `AgNO_(3)` or (en) and is optically inactive. A third form is optically acitve and reacts with both `AgNO_(3)` and (en) complexes are bis-bis (ethylenediamine) dinitrocobalt (III) chloride. trans -bis (ethylyenediamine) dinitrocobalt (III) chloride. trans chloronitrobis (ethylendiamine)cobalt (III) nitrite. First form of the complex isA. AB. BC. CD. none of these |
|
Answer» Correct Answer - C |
|
| 122. |
A compound `CO(en)_(2)NO_(2)Cl` has been prepared in a number of isomeric form . One form undergoes no reaction with `AgNO_(3)` or (en) and is optically inactive. A third form is optically acitve and reacts with both `AgNO_(3)` and (en) complexes are bis-bis (ethylenediamine) dinitrocobalt (III) chloride. trans -bis (ethylyenediamine) dinitrocobalt (III) chloride. trans chloronitrobis (ethylendiamine)cobalt (III) nitrite. One of the complexes starch iodide paper blue in acidic medium . This comples isA. CB. BC. AD. all of these . |
|
Answer» Correct Answer - A |
|
| 123. |
`Fe^(2+)` (Z = 26) has ....... electrons in 3d orbitalsA. 6B. 2C. 1D. 5 |
|
Answer» Correct Answer - A |
|
| 124. |
The complex ion `[Cu(NH_(3))_(4)]^(2+)` hasA. the tetrahedral configuration with one unpaired electron configurationB. square planar configuration with one unpaired electronsC. tetrahedral configuration with all electrons pairedD. square planar configuration will all electrous paired. |
|
Answer» Correct Answer - B `dsp^(2)`-hybridisation, square planar, one unpaired electron. |
|
| 125. |
The shape of `[Cu(NH_(3))_(4)]^(2+)` isA. tetrahedralB. square planarC. pyramidalD. octahedral |
|
Answer» Correct Answer - B `[Cu(NH_(3))_(4)]^(2+)` is a square planer complex (Refer Comprehensive Review). |
|
| 126. |
CO is a stronger ligand than `NH_(3)` for many metals. Explain. |
| Answer» CO is a stronger field ligand than `NH_(3)` because back of bonding leading to synergic effect. As a result, the bond between the ligand (CO) and metal (M) becomes stronger as compound to bond between `NH_(3)` and metal which is simply a co-oridinate bond. | |
| 127. |
The ligand NO is named asA. NitrosoniumB. NitroniumC. NitrosylD. Nitro |
|
Answer» Correct Answer - C Neutral NO is called nitrosyl |
|
| 128. |
The ratio of magnetic moment (spin only value) between `[FeF_(6)]^(3-)` and `[Fe(CN)_(6)]^(3-)` is approximatelyA. 4B. 2C. 5D. 3 |
|
Answer» Correct Answer - D `mu` = `sqrt n(n+2)` B.M For `[Fe(CN)_6]^(3-)` , n = 1 , `mu` `sqrt 1(1+2)` = 173 B.M For `[FeF_6]^(3-)` , n = 5 `mu` = `sqrt 5(5 + 2)` = 5.92 B.M Ratio = `5.92 / 1.73 = 3.` |
|
| 129. |
The complex with maximum magnetic in the following is :A. `[CoF_(6)]^(3-)`B. `[Co(NH_(3))_(6)]^(3+)`C. `[Ni(NH_(3))_(4)]^(2+)`D. `[Ni(CN)_(4)]^(2-)` |
|
Answer» Correct Answer - A Since `F^(-)` ions are weak field lifands, they cannot cause any electron pairing `(Co^(3+)` ) ion is the complex has `3d^(8)` configuration with four unpaired electrons. The complex is expected to be maximum paramagnetic in nature. All other complexes are of diamagnetic nature since the liagads are strong ligands. |
|
| 130. |
which of the folllowing coordination compound will give precipitate with an aqueous solution of `AgNO_(3)` ?A. `[CR(NH_(3))_(6)]Cl_(3)`B. `[Cr(NH_(3))_(3)Cl_(3)`]C. `[Cr(NH_(3))_(5)Cl]SO_(4)`D. `Na_(3)[Cr(CN)_6)]` . |
|
Answer» Correct Answer - A In the complex , three `Cl^(-)` ions are present Outside the co-ordinate sphere . They will acept three moles of `AgNO_(3)` to form three moles of AgCl as while precipitate. `[Cr(NH_(3))_(6)]Cl_(3)+ 3AgNO_(3) rArr [Cr(NH_(3))_(6)](NO_(3))_(3) + 3 AgCl` (white ppt.) |
|
| 131. |
The correct statement (s) regarding the binary transition metal carbonyl compounds is (are) (Atomic numbers: Fe = 26, Ni = 28)A. Total number of valence shell electrons at metal centre in `Fe(CO)_(5)` or `Ni(CO)_(4)` is 16B. These are predominantly low spin in natureC. Metal-carbon bond strengthens when the oxidationary state of the metal is loweredD. The carbonyl C-O bond weakens when the oxidation state of the metal is increased . |
|
Answer» Correct Answer - b,c (b,c) Fe`(CO)_5` total no of valence electrons = 18 low spin complex ltBrgt `Ni(CO)_4` : Total no. Of valence electrons = 18 low spin complex, Metal-carbonyl(C-O) bond is stronger is case of increased oxidation state of metal. |
|
| 132. |
Which of the following will give maximum number of isomer ?A. `[Co(NH_(3))_(4)Cl_(2)]`B. `[Ni(NH_(3))_(4)(en)]^(2+)`C. `[Ni(en)_(2)(C_(2)O_(4))]^(2-)`D. `[Cr(NH_(3))_(4)(SCN)_(2)]^(+)` |
|
Answer» Correct Answer - D In the complex , linkage , geometrical and optical isomers are possible. |
|
| 133. |
Write the structrue and the name of the co-oridnate isomer of `[Co(en)_(3)]Cr(CN)_(6)]` |
| Answer» `[Cr(en)_(3)][Co(CN)_(6)]:` tris("ethane"-1,2-diamine) Chromium (III) hexacyanocobaltate (III). | |
| 134. |
Which of the following exists as an optical isomer ?A. `[Zn(en)(NH_(3))_(2)]^(3+)`B. `[Co(en)_(3)]^(2+)`C. `[Co(H_(2)O)_(4)(en)]^(2+)`D. `[Zn(en)_(2)]^(2+)` |
|
Answer» Correct Answer - B b) it is the correct answer |
|
| 135. |
In the compound lithium tetrahydridoaluminate, the ligand isA. `A^(+)`B. HC. `H^(-)`D. None of these |
|
Answer» Correct Answer - C In lithium tetrahydridoaluminate `Li[AlH_(4)]` the ligand is `H^(-)` |
|
| 136. |
The IUPAC name of `[Ni (NH_(3))_(4)] [NiCl_(4)]` isA. Tetrachloronickel II-tetraaminenickel(II)B. Tetraaminenickel (II)-tetrachloronickel(II)C. Tetraaminenickel (II) tatrachloronickelate (II)D. Tetrachloronickel (II)-tetraaminenickelate (O). |
| Answer» Correct Answer - C | |
| 137. |
The IUPAC name of `[Ni(CO)_(4)]` isA. tetracarbonylnickel(I)B. tetracarbonylnickel(0)C. tetracarbonylnickel(II)D. tetracarbonylnickel(III) |
|
Answer» Correct Answer - B Questions based on rules of nomenclature (Refer to Comprehensive Review). |
|
| 138. |
Lithium tetrahydridoaluminate is correctly represented asA. `Al[LiH_(4)]`B. `Al_(2)[LiH_(4)]_(3)`C. `Li[AlH_(4)]`D. `Li[AlH_(4)]_(2)` |
|
Answer» Correct Answer - C Questions based on rules of nomenclature (Refer to Comprehensive Review). |
|
| 139. |
The correct name of the compound `[Cu(NH_(3))_(4)](NO_(3))_(2)`, according to IUPAC system isA. cuprammonium nitrateB. tetraamminecopper(II) dimitrateC. tetraamminecopper (II)nitrateD. tetraamminecopper (II) dinitrate. |
|
Answer» Correct Answer - C Questions based on rules of nomenclature (Refer to Comprehensive Review). |
|
| 140. |
Which of the following compounds is not yellow coloured ?A. `(NH_(3))_(3)[As(MO_(3)O_(1))_(4)]`B. `BaCrO_(4)`C. `Zn_(2)[Fe(CN)_(6)]`D. `K_(3)[Co(NO_(2))_(6)]` |
|
Answer» Correct Answer - C `Zn_(2)[Fe(CN)_6]` is bluish white in colour while other compounds are yellowish in colour. |
|
| 141. |
Which of the following compounds is not coloured ?A. `Na2[CuCl_(4)]`B. `Na_(2)[CdCl_(4)]`C. `K_(4)[Fe(Cl)_(6)]`D. `K_(3)[Fe(CN)_(6)]` |
|
Answer» Correct Answer - B `Na_(2)[CdCl_(4)]` is not coloured. This is due to fully filled `4d^(10)` outermost contiguration of `Cd^(2+)` ion |
|
| 142. |
Anmongst the following ions which one has the highest magnetic moment value ? (At.no. : Co= 27, Ni = 28)A. `[Co(NH_(3))_(6)]^(3+)`B. `[CoF_(6)]^(3-)`C. `[Ni(CO)_(4)]`D. `[Ni(CN)_(4)]^(2-)` |
| Answer» Correct Answer - B | |
| 143. |
The complex which has the highest magnetic moment among the following isA. `|CoF_(6)|^(3-)`B. `|Co(NH_(3))_(6)|^(3+)`C. `|Ni(NH_(3))_(4)|^(2+)`D. `|Ni(CN)_(4)|^(2-)` |
|
Answer» Correct Answer - A Number of unpaired electrons are 4 in (A) , 0 in (B), (C ), (D) and (E ). Hence `|CoF_(6)|^(3-)` has highest magnetic moment. |
|
| 144. |
What does EDTA stand for? |
| Answer» It is a hexadentate ligand and its name is ethylenediaminetetraacetate. | |
| 145. |
When EDTA solution is added to `Mg^(2+) ion solution, then which of the statements is not trueA. Four coordinate sites of `Mg^(2+)` are occupied by EDTA and remaining two sites are occupied by water moleculesB. All six coordinate sites of `Mg^(2+)`C. pH of the solution is decreasedD. Colourless `[Mg-EDTA]^(2-)` |
|
Answer» Correct Answer - A `Mg^(2+)` forms an octahedral complex with EDTA where all the six sites of `Mg^(2+)` are occupied. |
|
| 146. |
How many ions are produced from `[Co(NH_(3))_(6)]Cl_(3)` in solution ? |
|
Answer» The complex will dissociate in aqueous solution to give three ions `Co(NH_(3))_(6)Cl_(2) rarr [Co(NH_(3))_(6)]^(2+) + 2Cl^(-)` Therefore , (c) is the correct amswer . |
|
| 147. |
How many ions are formed by the complex `[Co(NH_(3))_(6)]Cl_(3)` in aqueous solution? |
| Answer» Four ions: `[Co(NH_(3))_(6)]Cl_(3) overset(aq)ltimplies [Co(NH_(3))_(6)]^(3+) (aq) + 3Cl^(-) (aq)` | |
| 148. |
Which complex compound is used in chemotherapy? |
| Answer» Cis-platin with formula `[Pt(NH_(2))Cl_(2)]` is used to chemotherapy for the treatment of cancer. | |
| 149. |
Write the formula and IUPAC name of prussian blue. |
| Answer» `Fe_(4)[Fe(CN)_(6)]_(3)` : iron (III) hexacyanoferrate (II) | |
| 150. |
Due to the presence of ambidenate ligands coordination compounds show isomerism. Palladium complexes of the type `[Pd(C_(6)H_(5))_(2)(SCN)_(2)]` & `[Pd(C_(6)H_(5))_(2)(NCS)_(2)]` areA. Linkage isomerismB. ionisation isomerismC. coordination isomerismD. no isomerism |
|
Answer» Correct Answer - A The tow complexes are related to each other by linkage isomerism. |
|