NEET Chemistry
Coordination Compounds
Question 1:
An example of a sigma bonded organometallic compound is :
(b) Ferrocene
(c) Cobaltocene
(d) Ruthenocene [Level: Moderate]
Question 2:
Which of the following has longest C–O bond length? (Free C–O bond length in CO is 1.128Å)
(a) Ni(CO)4
(b) [Co(CO)4]–
(c) [Fe(CO)4]2–
(d) [Mn(CO)6]+ [Level: Moderate]
Question 3:
The name of complex ion, [Fe(CN)6]3– is :
(a) Hexacyanoiron (III) ion
(b) Hexacyanitoferrate (III) ion
(c) Tricyanoferrate (III) ion
(d) Hexacyanidoferrate (III) ion [Level: Moderate]
Question 4:
Among the following complexes the one which shows zero crystal field stabilization energy (CFSE):
(a) [Mn(H2O)6]3+
(b) [Fe(H2O)6]3+
(c) [Co(H2O)6]2+
(d) [Co(H2O)6]3+ [Level: Moderate]
Question 5:
The anion of acetylacetone (acac) forms Co(acac)3 chelate with Co3+. The rings of the chelate are
(a) three membered
(b) five membered
(c) four membered
(d) six membered [Level: Difficult]
Question 6:
The correct IUPAC name for [CrF2(en)2]Cl is:
(a) Chlorodifluoridobis (ethylene diamine) chromium (III)
(b) Chlorodifluoridoethylenediaminech-romium (III) chloride
(c) Difluoridobis (ethylene diamine) chromium (III) chloride
(d) Difluorobis-(ethylene diamine) chromium (III) chloride [Level: Moderate]
Question 7:
What kind of isomerism exists between [Cr(H2O)6]Cl3 (violet) and [Cr(H2O)5Cl] Cl2.H2O (greyish-green)?
(a) Linkage isomerism
(c) Ionisation isomerism
(d) Coordination isomerism [Level: Easy]
Question 8:
The compounds [Co(SO4)(NH3)5]Br and [Co(SO4)(NH3)5]Cl represent
(a) linkage isomerism
(b) ionisation isomerism
(c) coordination isomerism
(d) no isomerism [Level: Moderate]
Question 9:
The stabilisation of coordination compounds due to chelation is called the chelate effect. Which of the following is the most stable complex species?
(a) [Fe(CO)5]
(b) [Fe(CN)6]3–
(d) [Fe(H2O)6]3+ [Level: Difficult]
Question 10:
Which of the following complexes formed by Cu2+ ions is most stable?
(a) Cu2+ + 4NH3 à [Cu(NH3)4]2+, log K = 11.6
(b) Cu2+ + 4CN– à [Cu(CN)4]2–, log K = 27.3
(c) Cu2+ + 2en à [Cu(en)2]2+, log K = 15.4
(d) Cu2+ + 4H2O à [Cu(H2O)4]2+, log K = 8.9 [Level: Easy]
Question 11:
Among the following metal carbonyls, the C–O bond order is lowest in
(a) [Mn(CO)6]+
(b) [Fe(CO)5]
(c) [Cr(CO)6]
(d) [V(CO)6]– [Level: Difficult]
Question 12:
The IUPAC name of [Ni (NH3)4] [NiCl4] is
(a) Tetrachloronickel (II) - tetraamminenickel (II)
(b) Tetraamminenickel (II) - tetrachloronickel (II)
(c) Tetraamminenickel (II) - tetrachloronickelate (II)
(d) Tetrachloronickel (II) - tetrachloronickelate (0) [Level: Moderate]
Question 13:
Among the following complexes, optical activity is possible in
(a) [Co(NH3)6]3+
(c) [Cr(H2O)2Cl2]+
(d) [Co(CN)5NC] [Level: Easy]
Question 14:
Ammonia will not form complex with
(a) Ag2+
(c) Cu2+
(d) Cd2+ [Level: Moderate]
Question 15:
The ligand N(CH2CH2NH2)3 is
(a) tridentate
(b) pentadentate
(d) bidentate [Level: Moderate]
Question 16:
The charge on the central metal ion in the complex [Ni(CO)4] is
(a) + 2
(b) + 4
(d) + 3 [Level: Moderate]
Question 17:
As per IUPAC nomenclature, the name of the complex [Co(H2O)4(NH3)2]Cl3 is :
(a) Tetraaquadiaminecobalt (III) chloride
(b) Tetraaquadiamminecobalt (III) chloride
(c) Diaminetetraaquacoblat (II) chloride
(d) Diamminetetraaquacobalt (III) chloride [Level: Moderate]
Question 18:
Which among the following will be named as dibromidobis(ethylene diamine) chromium (III) bromide?
(a) [Cr(en)3]Br3
(c) [Cr(en)Br4]–
(d) [Cr(en)Br2]Br [Level: Difficult]
Question 19:
Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?
(a) The complex involves d2sp3 hybridisation and is octahedral in shape.
(b) The complex is paramagnetic.
(c) The complex is an outer orbital complex
(d) The complex gives white precipitate with silver nitrate solution. [Level: Easy]
Question 20:
Which of the following has a square planar geometry?
(b) [CoCl4]2–
(c) [FeCl4]2–
(d) [NiCl4]2–
(At. nos.: Fe = 26, Co = 27, Ni = 28, Pt = 78) [Level: Difficult]
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