MCQ
The complex ion which has no $'d'$ electrons in the central metal atom is :
  • A
    $[Co(NH_3)_6]^{3+}$
  • B
    $[Fe(CN)_6]^{3-}$
  • $[Cr(H_2O)_6]^{3+}$
  • D
    $[MnO_4]^-$

Answer

Correct option: C.
$[Cr(H_2O)_6]^{3+}$
c
Theory based

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Although Zirconium belongs to $4d$ transition series and Hafnium to $5d$ transition series even then they show similar physical and chemical properties because $.......$
The unit of rate constant of second order reaction is usually expressed as
Given below are two statements :

Statement $I$: Aniline reacts with con. $\mathrm{H}_2 \mathrm{SO}_4$ followed by heating at $453-473 \mathrm{~K}$ gives $\mathrm{p}$ aminobenzene sulphonic acid, which gives blood red colour in the 'Lassaigne's test'.

Statement $II$: In Friedel - Craft's alkylation and acylation reactions, aniline forms salt with the $\mathrm{AlCl}_3$ catalyst. Due to this, nitrogen of aniline aquires a positive charge and acts as deactivating group.

In the light of the above statements, choose the correct answer from the options given below :

When $96500 $ coulomb of electricity is passed through a copper sulphate solution, the amount of copper deposited will be ............... $\mathrm{mol}$
The major product formed in the following reaction is:
In solvolysis of $1 , 2-$ dimethyl propyl $p$ -toluene sulfonate in acetic acid at  $75\,^oC$, (alkene + substitution products) will be formed by mechanism ?
Peptide Linkage is present in
In a set reactions acid yielded a product $D$  

$C{H_3}COOH\xrightarrow{{SOC{l_2}}}A\mathop {\xrightarrow{{Benzene}}}\limits_{Anhr.\,AlC{l_3}} B\xrightarrow{{HCN}}C\xrightarrow{{HOH}}D.$

The formulas of $A$ and $B$ for the following reaction sequence are.
The normal amount of glucose in $100\,ml$ of blood ($8-12 $ hours after a meal) is ........ $mg$.