In which of the following pairs both the complexes show optical i

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 Multiple Choice QuestionsMultiple Choice Questions

271.

The pair in which both species have same magnetic moment (spin only value) is

  • [Cr(H2O)6]2+,[CoCl4]2+

  • [Cr(H2O)6]2+,[Fe(H2O)6]2+

  • [Mn(H2O)6]2+, [Cr(H2O)6]2+

  • [CoCl4]2-, [Fe(H2O)6]2+


272.

Which gives nucleophilic addition most easily :

  • CH3CHO

  • CH3CH2CHO

  • (CH3)2CHCHO

  • HCHO


273.

The colour imparted by Co(II) compounds to glass is

  • green

  • deep-blue

  • yellow

  • red


274.

The number of possible isomers of an octahedral complex[Co(C2O4)2(NH3)2].

 

  • 1

  • 2

  • 3

  • 4


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275.

The ligands in anti-cancer drug cisplatin are

  • NH3, Cl

  • NH3, H2O

  • Cl, H2O

  • NO, Cl


276.

The magnetic moment of K3[Fe(CN)6]  is found to be 1.7 BM .How many unpaired electron (s) is/are present per molecule ?

  • 1

  • 2

  • 3

  • 4


277.

In [Ag(CN)2]-, the number of π bonds is

  • 2

  • 3

  • 4

  • 6


278.

An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of

  • [Co(H2O)4Cl2]

  • [Co(H2O)2Cl4]2-

  • [CoCl4]2-

  • [Co(H2O)2Cl2]


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279.

In which of the following pairs both the complexes show optical isomerism?

  • cis-[Cr(C2O4)2Cl2]3-, cis-[Co(NH3)4Cl2]

  • [Co(en)3]Cl3cis-[Co(en)2Cl2]Cl

  • [PtCl(dien)]Cl, [NiCl2Br2]2-

  • [Co(NO3)3(NH3)3], cis-[Pt(en)2Cl2]


B.

[Co(en)3]Cl3cis-[Co(en)2Cl2]Cl

Among all the given option, option b is correct. 

[Co(en)3]Cl3

cis-[Co(en)2Cl2]Cl


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280.

The correct order for the wavelength of absorption in the visible region is

  • [Ni(NO2)6]4- < [Ni(NH3)6]2+ < [Ni(H2O)6]2+

  • [Ni(NO2)6]4- < [Ni(H2O)6]2+ < [Ni(NH3)6]2+

  • [Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]4-

  • [Ni(NH3)6]2+ < [Ni(H2O)6]2+ < [Ni(NO2)6]4-


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