281.

Which one ofthe following forms with an excess of CN^- (cyanide) a complex having coordination number two?

• Cu⁺

• Ag⁺

• Ni²⁺

• Fe²⁺

Which of the following is not considered as an organometallic compound?

• cis-Platin

• Ferrocene

• Zeise's salt

• Grignard reagent

The complex used as an anti-cancer agent is

• mer-[Co(NH₃)₃Cl₃]

• cis-[PtCl₂(NH₃)₂]

• cis-K₂[PtCl₂Br₂]

• Na₂[CoCl₄]

The colourless species is

• VCl₃

• VOSO₄

• Na₃VO₄

• [V(H₂O)]SO₄.H₂O

Which of the following does not have optical isomer?

• [Co(NH₃)₃Cl₃]

• [Co(en)₃]Cl₃

• [Co(en)₂Cl₂]Cl

• [Co(en)(NH₃)₂Cl₂]Cl

What is the co-ordination number of sodium in Na₂O?

• 6

• 4

• 8

• 2

Assertion : The [Ni(en)₃]Cl₂ (en = ethylene diamine) has lower stability than [Ni(NH₃)₆]Cl₅.

Reason : In [Ni(en)₃]Cl₂ the geometry of Ni is trigonal bipyramidal.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

In the following compound, the number of sp-hybridised carbons are

CH₂ = C = CH - CN(CH) - C ≡ CH

• 2

• 3

• 4

• 5

Which of the following molecule or ions is a bidentate ligand?

• ${\mathrm{C}}_2{\mathrm{O}}_4^{2-}$

• ${\mathrm{Br}}_2^{+}$

• ${\mathrm{CH}}_3{\mathrm{NH}}_2$

• ${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{N}$

CO is practically non-polar since

• the sigma electron drift from C to O is almost nullified by the pi-electron drift from O to C

• the sigma electron drift from O to C is almost nullified by the pi-electron drift from C to O

• the bond moment is low

• there is a triple bond between C and O