384 + Interview Questions in CO-ORDINATION-COMPOUNDS IN GENERAL AWARENESS Page 5 InterviewSolution

201.	The oxidation state of `Fe` in `Fe(CO)_(5)` isA. `-1`B. `+2`C. `+3`D. None of these
Answer» Correct Answer - D O.N. of Fe in `Fe(CO)_(5)` is zero.

Discussion

202.	`KClMgCl_(2)6H_(2)O` is aA. mixed saltB. double saltC. basic saltD. complex salt.
Answer» Correct Answer - B It is a double salt as it ionises in aqueous solution as `KCl.MgCl_(2).6H_(2)OhArr K^(+) + Mg^(2+) + 3Cl^(-) + 6H_(2)O`

Discussion

203.	The Complexes given below show: A. optical isomerismB. co-ordination isomerismC. geometrical isomerismD. bridged isomerism.
Answer» Correct Answer - C First isomer is cis while second is trans.

Discussion

204.	The isomer can be marked as A. dextro isomerB. laevo isomerC. cis isomerD. trans isomer
Answer» Correct Answer - D Factual problems on isomerism.

Discussion

205.	The compounds `[Cr(H_(2)O)_(6)]Cl_(3)` and `[Cr(H_(2)O)_(4) Cl_(2)]Cl.2H_(2)O` representA. Linkage isomerismB. Hydrate isomerismC. Ligand isomerismD. None of these
Answer» Correct Answer - B Factual problems on isomerism.

Discussion

206.	Give the IUPAC name of `[Cr(H_(2)O))_(4)Cl_(2)]Cl`.
Answer» tetraquadichloridochromium (III) chloride.

Discussion

207.	Write the IUPAC name of `K_(3)[Cr(C_(2)O_(4))_(3)]`
Answer» potassium trioxalatchromate (III).

Discussion

208.	The compound used in the treatment of lead poisoning is :
Answer» The co-ordination compound is EDTA and its denticity is six .

Discussion

209.	When `SCN^(-)` is oxided to an aqueous solution isA. `\|Fe(OH_(2))_(2)(SCN)^(2)\|^(2+)`B. `\|Fe(OH_(2))_(5)(SCN)\|^(2+)`C. `\|Fe(OH_(2))_(8)(SCN)\|^(2+)`D. `\|Fe(OH_(2))_(2)(SCN)\|^(6+)`
Answer» Correct Answer - B `Fe^(3+) + SCN^(-) + H_(2)Orarr \|Fe(H_(2)O)_(5)SCN\|^(2+)` (Red colour) i.e. `:.` hybridization is `sp^(3)d^(2)` outer orbital (high spin octahedral.

Discussion

210.	Fac, mer isomerism is associated with which of the following general formula ?A. `[M(AA)_(2)]`B. `[M(A_(3)B_(3))]`C. `[M(AA)_(3)]`D. `[MABCD]`
Answer» Correct Answer - B (a) is the correct answer. For details , consult section 9.7

Discussion

211.	For `mu` isomerism is associated with which one of the following complex ? (M = central metal)A. `[M(A A)_(2)]`B. `[MA_(3)B_(3)]`C. `[M(A A)_(3)]`D. [MABCD]
Answer» Correct Answer - B

Discussion

212.	The formula of sodium nitroprusside isA. `Na_(2)[Fe(CN)_(3)NO]`B. `Na_(3)[Fe(CN)_(5)ONO]`C. `Na_(2)[Fe(CN)_(5)NO]`D. `Na_(4)[Fe(CN)_(4)NO]`
Answer» Correct Answer - C

Discussion

213.	According to IUPAC nomenclature sodium nitroprusside is named asA. sodium numtroprussideB. sodium nitroferrocyanideC. sodium pentacyanonsylferrate (III)D. sodium pentacyanonitrosoniumferrate (II).
Answer» Correct Answer - D IUPAC name of sodium nitroprusside is sodium pentacyanonitrosoniumferrate (II)

Discussion

214.	The formula of sodium nitroprusside isA. `Na_(4)[Fe(CN)_(5)NOS]`B. `Na_(2)[Fe(CN)_(5)NO]`C. `NaFe[(Fe(CN)_(6)]`D. `Na_(2)[Fe(CN)_(6)NO_(2)]`.
Answer» Correct Answer - B `Na_(2)[Fe(CN)_(5)NO]` Sodium nitroprusside

Discussion

215.	The formula of carnallite isA. Simple saltB. Douboe saltC. AlumD. Coordination compound
Answer» Correct Answer - B Carnalate is `KCl.MgCl_(2).6H_(2)O`. It is a double salt

Discussion

216.	When each of the following complex salts is treated with excess of `AgNO_(3)` solution, which will give the maximum amount of AgClA. `[Co(NH_(3))_(6)]Cl_(3)`B. `[Co(NH_(3))_(5)Cl]Cl_(2)`C. `[Co(NH_(3))_(4)Cl_(2)]Cl`D. `Na_(2)[PtCl_(6)]`
Answer» Correct Answer - A The complex has the maximum number of `Cl^(-)` ions (anions) available per mole for reacting with excess of `AgNO_3` solution.

Discussion

217.	Which of the following can be termed as mixed complex ?A. `K_(4)[Fe(CN)_(6)]`B. `[Cu(NH)_(4)]SO_(4)`C. `Co[(NH_(3))_(4)NO_(2)Cl]Cl`D. `K_(2)FeSO_(4)`
Answer» Correct Answer - C A mixed complex entity contains more than one type of ligands

Discussion

218.	The pair having the same magnetic moment is [at. No. `Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]`A. `[MnO_(4)]^(-)`B. `[Co(NH_(3))_(6)]^(3+)`C. `[Fe(CN)_(6)]^(3-)`D. `[Cr(H_(2)O)_(6)]^(3+)`
Answer» Correct Answer - A In `[MnO_(4)]^(-), Mn^(7+)` has no d-electron.

Discussion

219.	An octahedral complex is formed when hybrid orbitals of the following type are involvedA. `sp^(3)`B. `dsp^(2)`C. `sp^(3)d^(2)`D. `sp^(3)d`
Answer» Correct Answer - C Octahedral geometry is associated , with `sp^(3)d^(2)` or `d^(2)sp^(3)`-hybrid state

Discussion

220.	Which among the following will be named as dibromidobis (ethylene diamine) chromium (III) bromide?A. `[Cr(en)_(3)] Br_(3)`B. `[Cr(en)_(2)Br_(2)]Br`C. `[Cr(en)Br_(4)]^(-)`D. `[Cr(en)Br_(2)]Br`
Answer» Correct Answer - B

Discussion

221.	The correct order of magnetic moments (spin values in B.M.) among is:A. `[Fe(CN)_(6)]^(4-) gt [MnCl_(4)]^(2-) gt [CoCl_(4)]^(2-)`B. `[MnCl_(4)]^(2-) gt [Fe(CN)_(6)]^(4-) gt [CoCl_(4)]^(2-)`C. `[MnCl_(4)]^(2-) gt [CoCl_(4)]^(2-) gt [Fe(CN)_(6)]^(4-)`D. `[Fe(CN)_(6)]^(4-) gt [CoCl_(4)]^(2-) gt [MnCl_(4)]^(2-)`
Answer» Correct Answer - C No. of unpaired electrons `underset("five")[MnCl_(4)]^(2-) gt underset("three")[CoCl_(2)]^(2-) gt underset("zero")[Fe(CN)_(6)]^(4-)`

Discussion

222.	Which of the following complexes are heteroleptic ?A. `[Cr(NH_(3))_(6)]^(3+)`B. `[Fe(NH_(3))_(4)Cl_(2)]^(+)`C. `[Mn(CN)_(6)]^(4-)`D. `[Co(NH_(3))_(4)Cl_(2)]`
Answer» Correct Answer - B::D b,d are heteroleptics since different ligands are present.

Discussion

223.	The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light of the visible region, for the complexes, `[Co(NH_(3)_(6)]^(3+). [Co(CN)_(6)]^(3+). [Co(H_(2)O)_(6)]^(3+)`A. `[Co)CN)_(6)]^(3-) gt [Co(NH_(3))_(6)]^(3+) gt [Co(H_(2)O)_(6)]^(3+)`B. `[Co(NH_(3))_(6)]^(3+) gt [Co(H_(2)O)_(6)]^(3+) gt [Co(CN)_(6)]^(3-)`C. `[CoH_(2)O)_(6)]^(3+) gt Co(NH_(3))_(6)]^(3+) gt [Co(CN)_(6)]^(3-)`D. `[Co(CN)_(6)]^(3-) gt [Co(NH_(3))_()]^(3+) gt [Co(H_(2)O)_(6)]^(3+)`
Answer» Correct Answer - C all are octahedral complexes of `Co^(3-)` ion. The order of absorption of wavelength of light by different ligands is according to spectrochemical series.

Discussion

224.	Which of the following complexes formed by `Cu^(2+)` ions is most stable ?A. `Cu^(2+) + 4NH_(3) ltimplies [Cu(NH)_(3)_(4)]^(2+). logK = 11.6`B. `Cu^(2+) + 4CN^(-) ltimplies [Cu(CN)_(4)]^(2-). Log K = 27.3`C. `Cu^(2+) + 4H_(2)O ltimplies [Cu(H_(2)O)_(4)]^(2+). Log K = 15.4`D. `Cu^(2+) + 4H_(2)O ltimplies [Cu(H_(2)O)_(4)]^(2+). Log K = 8.9`
Answer» Correct Answer - B Greater the value of stablility constant (k) or log K, more is the stablity of the complex.

Discussion

225.	The co-ordination number and oxidation number of X in the following compound `[X(SO_(4))(NH_(3))_(5)]Cl` will beA. 10 and 3B. 2 and 6C. 6 and 3D. 6 and 4.
Answer» Correct Answer - C The C.N. and O.N. of X are respectively 6 and 3

Discussion

226.	Which of the following complex will give white ppt. with `BaCl_(2)` solution ?A. `[Cr(NH_(3))_(5)SO_(4)]Cl`B. `[Co(NH_(3))_(4)Cl_(2)]NO_(2)`C. `[Cr(NH_(3))_(5)Cl]SO_(4)`D. Both A and C
Answer» Correct Answer - C `[Cr(NH_(3))_(5)Cl]SO_(4)hArr [Cr(NH_(3))_(5)Cl]^(2+) + SO_(4)^(2-)` `SO_(4)^(2-)` ions form precipitate with `BaCl_(2)` solution `SO_(4)^(2-) + BaCl_(2)(aq)rarr underset(ppt) (BaSO_(4))darr + 2Cl^(-)(aq)`

Discussion

227.	How many ions are produced from `[Co(NH_(3))_(6)]Cl_(3)` in solution ?A. 6B. 4C. 3D. 2
Answer» Correct Answer - B `[Co(NH_(3))_(6)]Cl_(3)hArr[Co(NH_(3))_(6)]^(+) + 3Cl^(-)` Hence 4 ions per molecule are produced.

Discussion

228.	The co-ordination number and the oxidation state of the element E in the complex. `` are respectively ?A. 6 and 3B. 6 and 2C. 4 and 2D. 4 and 3
Answer» Correct Answer - A CN of E = 6 , oxidatioin state of E(x) x + `2(0)` + - 2 = +1 x = +1 +2 = +3

Discussion

229.	What is basic difference between a double salt and a co-ordination complex ?
Answer» For answer , consult table 1 .

Discussion

230.	Which of the following is not a double salt but is a complex salt ?A. `KCl MgCl_(2).6H_(2)O`B. `FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`C. `K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`D. `4KCN.Fe(CN)_(2)`.
Answer» Actually `4KCN.Fe(CN)_(2) is K_(4)[Fe(CN)_(6)]` and is a coordination compounds.

Discussion

231.	Which of the following pair contains complex salt and double salt respectively?A. `FeSO_(4), K_(4)[Fe(CN)_(6)]`B. `[Cu(NH_(3))_(4)]SO_(4), FeSO_(4).7H_(2)O`C. `[Cu(NH_(3))_(4)]SO_(4), K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`D. `MgSO_(4).7H_(2)O, CuSO_(4)`
Answer» Correct Answer - C Factual question

Discussion

232.	The correct increasing order of trans-effect of the following species isA. `NH_(3) gt CN^(-) gt Br^(-) gt C_(6)H_(5)^(-)`B. `CN^(-) gt C_(6)H_(5)^(-) gt Br^(-) gt NH_(3)`C. `Br^(-) gt CN^(-) gt NH_(3) gt C_(6)H_(5)^(-)`D. `CN^(-) gt Br^(-) gt C_(6)H_(5)^(-) gt NH_(3)`
Answer» Correct Answer - A For details ,consult section 9.7.

Discussion

233.	Which of the following can act as catalysts ?A. `(Ph_(3)P)_(3)RhCl`B. `TiCl_(4)` and `(C_(2)H_(5))_(3)Al`C. `Cu^(2+)` ionsD. `(CH_(3))_(2)Zn`
Answer» Correct Answer - a,b (a,b) are correct

Discussion

234.	The oxidation number of Mn in the product of alkaline oxidative fusion of `MnO_2` is
Answer» Correct Answer - A Reaction involved in the oxidative fusion of `MnO_(2)` is `2MnO_(2)+$KOH+O_(2) rarr 2K_(2)MnO_(4) + 2H_(2)O` The oxidation number of Mn in `K_(2)MnO_(4)` is `+6`.

Discussion

235.	The planar complex Mabcd givesA. Two optical isomersB. Two geometrical isomersC. Three optical isomersD. Three geometrical isomers.
Answer» Correct Answer - D See Comprehensive Review.

Discussion

236.	In the formula `Fe(eta^(5)-C_5H_5)`, what does the prefix `eta^(5)` denote?
Answer» `eta^(5)` means that 5 carbon atoms of `C_(5)H_(5)` are linked to the metal (Fe) atom.

Discussion

237.	The questions given below consist of Assertion (A) and Reason (R ) . Use the following key to select the correct answer. Assertion : Tetrahedral complexes donot show geometrical isomerism Reason : The relative positions of the ligands in the tetrahedral complexes are the same with respect to each other .A. If both assertion and reason are correct and reason is correct explanation for assertion .B. If both assertion and reason are correct but reason is not correct explanation for assertion .C. If assertion is correct but reason is incorrectD. If both assertion and reason are incorrect
Answer» Correct Answer - a Reason is the correct answer for assertion .

Discussion

238.	The pair of the compounds in which both the metals are in the highest possible oxidation state isA. `[Fe(CN)_(6)]^(3-), [Co(CN)_(6)]^(3-)`B. `CrO_(2)Cl_(2), MnO_(4)^(-)`C. `TiO_(3), MnO_(2)`D. `[Co(CN)_(6)]^(3-), MnO_(2)`
Answer» Correct Answer - B In case of neutral molecules, the algebraic sum of the oxidation number of all the atoms present in the molecules is zero. For complex ion , the algebraic sum of oxidation number of all atoms is equal to net charge on the ion. Let the oxidation number of Cr in `CrO_(2)Cl_(2)` and oxidation number of Mn in `MnO_(4)^(-)` are x and y respectively. `CrO_(2)Cl_(2)` `MnO_(4)^(-)` `x+2(-2)+2(-1) = 0` `x-4-2=0` `x-6 = 0` x = 6 `y+4(-2) = -1` `y-8 = -1` `y = -1+8` y = 7

Discussion

239.	Among the properties `(A)` reducing`(B)` oxidising `(C )` complexing the set of properties shown by `CN^(Θ)`ion towards metal species is .A. b, cB. a, b, cC. c, aD. a, b
Answer» CN acts both as reducing agent as well as good complexing agent.

Discussion

240.	Which of the following complexes is paramagneticA. `[Ni(CO_(4)]`B. `[Ni(CN)_(4)]^(2-)`C. `[Co(NH_(3))_(6)]^(3+)`D. `[NiCl_(4)]^(2-)`
Answer» Correct Answer - D `[NiCl_4]^(2-)` is paramagnetic in nature. Rest are all diamagnetic.

Discussion

241.	In a square planar complex of the type [Mabex], the number of geometrical isomers can be :A. No geometrical isomersB. ThreeC. TwoD. Four
Answer» Correct Answer - B It has three geometrical isomers. For details consult section 9.7.

Discussion

242.	Among the following complexes, the one which shows zero crystal field stabilization energy (CFSE) isA. `[Fe(H_(2)O)_(6)]^(3+)`B. `[Co(H_(2)O)_(6)]^(2+)`C. `[Co(H_(2)O)_(6)]^(3+)`D. `[Mn(H_(2)O)_(6)]^(3+)`
Answer» Correct Answer - A `Fe^(3+)(d^(5))` has `t_2g^(3)``e_(g)^(2)` configuration CFSE(`delta_0)` = `3 xx (-0.4) + (2+).6) `= 0

Discussion

243.	An excess of `AgNO_(3)` is added to `100mL` of a `0.01M` solution of dichlorotetraaquachromium(III) chloride The number of moles of `AgCI` precipitated would be .A. `0.001`B. `0.002`C. `0.003`D. `0.01`
Answer» Correct Answer - B The complex is `\|Cr(H_(2)O)_(4)Cl_(2)\|Cl` . It ionizes as `underset(1"mole")\|Cr(H_(2)O)_(4)Cl_(2)\|Cl hArr \|Cr(H_(2)O)_(4)Cl_(2)\|^(+)underset(1"mole")(+Cl^(-))` Thus 1 mole of the complex forms 1 mole of `Cl^(-)` ions and will precipitate 1 mole of AgCl 100 mL of `0.01` M complex solution contains moles of complex = `0.01/1000xx100=0.001` mole and will precipitate `0.001` mole of AgCl.

Discussion

244.	Cobalt (III) chloride forms several octahedral complexes with amonia. Which of the following will not give test for chloride ions with silver nitrate at `25^@C`?A. `CoCl_(3), 5NH_(3)`B. `CoCl_(3). 6NH_(3)`C. `CoCl_(3). 3NH_(3)`D. `CoCl_(3). 4NH_(3)`
Answer» Correct Answer - C All the complexes are of octahedral nature which means that the `Co^(3+)` ion has six ligands attached to it in the co-ordination sphere. The complex `CoCl_3.3NH_3` will not give any white precipitate with silver nitrate solution since it has no free `Cl^(-)` ions present in the ionisation sphere.

Discussion

245.	A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?A. thiosulphatoB. oxalatoC. glycinatoD. ethane-1,2-diamine.
Answer» Correct Answer - A Thiosulphate `(S_(2)O_(3))^(2-)` does have the points of linkage. It is not a chelating agent.

Discussion

246.	Which of the following represents chelating ligand ?A. `Cl^(-)`B. DMGC. `OH^(-)`D. `H_(2)overset(..)O:`
Answer» Correct Answer - B DMG, being a polydentate ligand binds itself with central nickal atom forming cyclic structures called chelates.

Discussion

247.	Which of the following ligand gives chelate complexes ?A. `SCN^(-)`B. `C_(2)O_(4)^(2-)`C. pyridineD. `NH_(2)-NH_(3)`
Answer» Correct Answer - B `C_(2)O_(4)^(2-)` is a symmetrical bidentate ligand

Discussion

248.	The total number possible isomers for the complex compound `[Cu^(II)(NH_(3))_(4) [Pt^(II)CI_(4)]` areA. 3B. 6C. 5D. 4
Answer» Correct Answer - D Four co-ordination isomers are `[Cu(NH_(3))_(4)][PtCl_(4)], [Pt(NH_(3))_(4)][CuCl_(4)]`, `[Cu(NH_(3))_(3)Cl][PtCl_(3)(NH_(3))]` and `[Pt(NH_(3))_(3)Cl][CuCl_(3)(NH_(3))]`

Discussion

249.	What is the number of possible isomers for the octahedral complex `[Co(NH_(3))_(2)(C_(2)O_(4))_(2)]` ?A. 1B. 2C. 3D. 4
Answer» Correct Answer - C It exists as cis and trans geometrical isomers. The cis isomer will have an optical isomer. Thus , there will be there isomers. For details , consult section 9.7

Discussion

250.	One mole of complex compound `Co(NH_3)_5Cl_3` gives 3 moles of ions on dissolution in water. One mole of same complex reacts with two moles of `AgNO_3` to yield two moles of `AgCl(s)`. The complex is:A. `[Co(NH_(3))_(5)Cl]Cl_(2)`B. `[Co(NH_(3))_(3)Cl_(3)].2NH_(3)`C. `[Co(NH_(3))_(4)Cl_(2)]Cl.2NH_(3)`D. `[Co(NH_(3))_(4)Cl]Cl_(2).NH_(3)`.
Answer» Correct Answer - A The date corresponds to the formula `[Co(NH_(3))_(5)Cl]Cl_(2)` .

Discussion

Explore topic-wise InterviewSolutions in .

The oxidation state of `Fe` in `Fe(CO)_(5)` isA. `-1`B. `+2`C. `+3`D. None of these

`KClMgCl_(2)6H_(2)O` is aA. mixed saltB. double saltC. basic saltD. complex salt.

The Complexes given below show: A. optical isomerismB. co-ordination isomerismC. geometrical isomerismD. bridged isomerism.

The isomer can be marked as A. dextro isomerB. laevo isomerC. cis isomerD. trans isomer

The compounds `[Cr(H_(2)O)_(6)]Cl_(3)` and `[Cr(H_(2)O)_(4) Cl_(2)]Cl.2H_(2)O` representA. Linkage isomerismB. Hydrate isomerismC. Ligand isomerismD. None of these

Give the IUPAC name of `[Cr(H_(2)O))_(4)Cl_(2)]Cl`.

Write the IUPAC name of `K_(3)[Cr(C_(2)O_(4))_(3)]`

The compound used in the treatment of lead poisoning is :

When `SCN^(-)` is oxided to an aqueous solution isA. `|Fe(OH_(2))_(2)(SCN)^(2)|^(2+)`B. `|Fe(OH_(2))_(5)(SCN)|^(2+)`C. `|Fe(OH_(2))_(8)(SCN)|^(2+)`D. `|Fe(OH_(2))_(2)(SCN)|^(6+)`

Fac, mer isomerism is associated with which of the following general formula ?A. `[M(AA)_(2)]`B. `[M(A_(3)B_(3))]`C. `[M(AA)_(3)]`D. `[MABCD]`

For `mu` isomerism is associated with which one of the following complex ? (M = central metal)A. `[M(A A)_(2)]`B. `[MA_(3)B_(3)]`C. `[M(A A)_(3)]`D. [MABCD]

The formula of sodium nitroprusside isA. `Na_(2)[Fe(CN)_(3)NO]`B. `Na_(3)[Fe(CN)_(5)ONO]`C. `Na_(2)[Fe(CN)_(5)NO]`D. `Na_(4)[Fe(CN)_(4)NO]`

According to IUPAC nomenclature sodium nitroprusside is named asA. sodium numtroprussideB. sodium nitroferrocyanideC. sodium pentacyanonsylferrate (III)D. sodium pentacyanonitrosoniumferrate (II).

The formula of sodium nitroprusside isA. `Na_(4)[Fe(CN)_(5)NOS]`B. `Na_(2)[Fe(CN)_(5)NO]`C. `NaFe[(Fe(CN)_(6)]`D. `Na_(2)[Fe(CN)_(6)NO_(2)]`.

The formula of carnallite isA. Simple saltB. Douboe saltC. AlumD. Coordination compound

When each of the following complex salts is treated with excess of `AgNO_(3)` solution, which will give the maximum amount of AgClA. `[Co(NH_(3))_(6)]Cl_(3)`B. `[Co(NH_(3))_(5)Cl]Cl_(2)`C. `[Co(NH_(3))_(4)Cl_(2)]Cl`D. `Na_(2)[PtCl_(6)]`

Which of the following can be termed as mixed complex ?A. `K_(4)[Fe(CN)_(6)]`B. `[Cu(NH)_(4)]SO_(4)`C. `Co[(NH_(3))_(4)NO_(2)Cl]Cl`D. `K_(2)FeSO_(4)`

The pair having the same magnetic moment is [at. No. `Cr = 24, Mn = 25, Fe = 26 " and " Co = 27]`A. `[MnO_(4)]^(-)`B. `[Co(NH_(3))_(6)]^(3+)`C. `[Fe(CN)_(6)]^(3-)`D. `[Cr(H_(2)O)_(6)]^(3+)`

An octahedral complex is formed when hybrid orbitals of the following type are involvedA. `sp^(3)`B. `dsp^(2)`C. `sp^(3)d^(2)`D. `sp^(3)d`

Which among the following will be named as dibromidobis (ethylene diamine) chromium (III) bromide?A. `[Cr(en)_(3)] Br_(3)`B. `[Cr(en)_(2)Br_(2)]Br`C. `[Cr(en)Br_(4)]^(-)`D. `[Cr(en)Br_(2)]Br`

Which of the following complexes are heteroleptic ?A. `[Cr(NH_(3))_(6)]^(3+)`B. `[Fe(NH_(3))_(4)Cl_(2)]^(+)`C. `[Mn(CN)_(6)]^(4-)`D. `[Co(NH_(3))_(4)Cl_(2)]`

The co-ordination number and oxidation number of X in the following compound `[X(SO_(4))(NH_(3))_(5)]Cl` will beA. 10 and 3B. 2 and 6C. 6 and 3D. 6 and 4.

Which of the following complex will give white ppt. with `BaCl_(2)` solution ?A. `[Cr(NH_(3))_(5)SO_(4)]Cl`B. `[Co(NH_(3))_(4)Cl_(2)]NO_(2)`C. `[Cr(NH_(3))_(5)Cl]SO_(4)`D. Both A and C

How many ions are produced from `[Co(NH_(3))_(6)]Cl_(3)` in solution ?A. 6B. 4C. 3D. 2

The co-ordination number and the oxidation state of the element E in the complex. `` are respectively ?A. 6 and 3B. 6 and 2C. 4 and 2D. 4 and 3

What is basic difference between a double salt and a co-ordination complex ?

Which of the following is not a double salt but is a complex salt ?A. `KCl MgCl_(2).6H_(2)O`B. `FeSO_(4)(NH_(4))_(2)SO_(4).6H_(2)O`C. `K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`D. `4KCN.Fe(CN)_(2)`.

Which of the following pair contains complex salt and double salt respectively?A. `FeSO_(4), K_(4)[Fe(CN)_(6)]`B. `[Cu(NH_(3))_(4)]SO_(4), FeSO_(4).7H_(2)O`C. `[Cu(NH_(3))_(4)]SO_(4), K_(2)SO_(4)Al_(2)(SO_(4))_(3).24H_(2)O`D. `MgSO_(4).7H_(2)O, CuSO_(4)`

The correct increasing order of trans-effect of the following species isA. `NH_(3) gt CN^(-) gt Br^(-) gt C_(6)H_(5)^(-)`B. `CN^(-) gt C_(6)H_(5)^(-) gt Br^(-) gt NH_(3)`C. `Br^(-) gt CN^(-) gt NH_(3) gt C_(6)H_(5)^(-)`D. `CN^(-) gt Br^(-) gt C_(6)H_(5)^(-) gt NH_(3)`

Which of the following can act as catalysts ?A. `(Ph_(3)P)_(3)RhCl`B. `TiCl_(4)` and `(C_(2)H_(5))_(3)Al`C. `Cu^(2+)` ionsD. `(CH_(3))_(2)Zn`

The oxidation number of Mn in the product of alkaline oxidative fusion of `MnO_2` is

The planar complex Mabcd givesA. Two optical isomersB. Two geometrical isomersC. Three optical isomersD. Three geometrical isomers.

In the formula `Fe(eta^(5)-C_5H_5)`, what does the prefix `eta^(5)` denote?

The pair of the compounds in which both the metals are in the highest possible oxidation state isA. `[Fe(CN)_(6)]^(3-), [Co(CN)_(6)]^(3-)`B. `CrO_(2)Cl_(2), MnO_(4)^(-)`C. `TiO_(3), MnO_(2)`D. `[Co(CN)_(6)]^(3-), MnO_(2)`

Among the properties `(A)` reducing`(B)` oxidising `(C )` complexing the set of properties shown by `CN^(Θ)`ion towards metal species is .A. b, cB. a, b, cC. c, aD. a, b

Which of the following complexes is paramagneticA. `[Ni(CO_(4)]`B. `[Ni(CN)_(4)]^(2-)`C. `[Co(NH_(3))_(6)]^(3+)`D. `[NiCl_(4)]^(2-)`

In a square planar complex of the type [Mabex], the number of geometrical isomers can be :A. No geometrical isomersB. ThreeC. TwoD. Four

Among the following complexes, the one which shows zero crystal field stabilization energy (CFSE) isA. `[Fe(H_(2)O)_(6)]^(3+)`B. `[Co(H_(2)O)_(6)]^(2+)`C. `[Co(H_(2)O)_(6)]^(3+)`D. `[Mn(H_(2)O)_(6)]^(3+)`

An excess of `AgNO_(3)` is added to `100mL` of a `0.01M` solution of dichlorotetraaquachromium(III) chloride The number of moles of `AgCI` precipitated would be .A. `0.001`B. `0.002`C. `0.003`D. `0.01`

Cobalt (III) chloride forms several octahedral complexes with amonia. Which of the following will not give test for chloride ions with silver nitrate at `25^@C`?A. `CoCl_(3), 5NH_(3)`B. `CoCl_(3). 6NH_(3)`C. `CoCl_(3). 3NH_(3)`D. `CoCl_(3). 4NH_(3)`

A chelating agent has two or more than two donor atoms to bind to a single metal ion. Which of the following is not a chelating agent?A. thiosulphatoB. oxalatoC. glycinatoD. ethane-1,2-diamine.

Which of the following represents chelating ligand ?A. `Cl^(-)`B. DMGC. `OH^(-)`D. `H_(2)overset(..)O:`

Which of the following ligand gives chelate complexes ?A. `SCN^(-)`B. `C_(2)O_(4)^(2-)`C. pyridineD. `NH_(2)-NH_(3)`

The total number possible isomers for the complex compound `[Cu^(II)(NH_(3))_(4) [Pt^(II)CI_(4)]` areA. 3B. 6C. 5D. 4

What is the number of possible isomers for the octahedral complex `[Co(NH_(3))_(2)(C_(2)O_(4))_(2)]` ?A. 1B. 2C. 3D. 4