Friday, December 21, 2018

Chem quiz

Q.1 The water exchange rates for the complex ions follow the order
         (A) [V(H2O)6]2+ > [Co(H2O)6]2+ > [Cr(H2O)6]3+
         (B) [Cr(H2O)6]3+ > [Co(H2O)6]2+ > [V(H2O)6]2+
         (C) [Co(H2O)6]2+ > [Cr(H2O)6]3+  > [V(H2O)6]2+
         (D) [Co(H2O)6]2+ > [V(H2O)6]2+ > [Cr(H2O)6]3+

Image result for water exchange rate images

Ansewr:-D 

Q.2 Based on Wade’s rule, the structure-type of [B₅H₈]⁻ is
        (A) closo
        (B) nido
        (C)  arachno
        (D)  hypho

Ansewr:-B

Q.3  The coordination geometries around the copper ion of plastocyanin (a blue-copper protein) in              oxidized and reduced form, respectively, are
         (A) tetrahedral and square-planar
         (B) square-planar and tetrahedral
         (C) distorted tetrahedral for both
         (D) ideal tetrahedral for both

Answer:-C

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