MCQ
The diamagnetic species is
  • A
    $[Co(H_2O)_6]^{2+}$
  • B
    $[Ni(H_2O)_6)^{2+}$
  • $[Co(NH_3)_6]^{3+}$
  • D
    $[Ni(NH_3)_6]^{2+}$

Answer

Correct option: C.
$[Co(NH_3)_6]^{3+}$
c

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

$pH$ of an aqueous solution of $CH_3COONH_4$ is found to be $6.7$ at $25\,^oC$. Concentration of $CH_3COONH_4$ solution may be ($K_a$ for $CH_3COOH = 1.0 \times 10^{-5}$ and $pK_b$ for $NH_4OH = 4.4$)
The oxygen dissolved in water exerts a partial pressure of $20\, kPa$ in the vapour above water. The molar solubility of oxygen in water is ............ $-\times 10^{-5}\, mol\, dm ^{-3}$

(Round off to the Nearest Integer).

[Given : Henry's law constant $= K _{ H }=8.0 \times 10^{4} kPa$ for $O _{2}$ Density of water with dissolved oxygen $=1.0\, kg\, dm ^{-3}$ ]

Which of the following are isoelectronic and isostructural?$\ce{NO^-_3, CO^{2-}_3 ,CO^-_3 ,SO_3}$
Percentage of lead in lead pencil is
In acidic medium one mole of $MnO_4^ - $ accepts how many moles of electrons in a redox process ?
Which of the following is a polar compound
General electronic configuration of outermost and penultimate shell is $(n -1)\, s^2 \,(n -1)p^6(n -1)\, d^x\, ns^2$. If $n = 4$ and $x = 5$, then number of protons in the nucleus will be :-
Assertion : The major products formed by heating $C_6H_5CH_2OCH_3$ with $HI$ are $C_6H_5CH_2I$ and $CH_3OH$
Reason : Benzyl cation is more stable than methyl cation
Select schemes $A, B, C$ out of

$I-$ acid catalysed hydration

$II-$ $HBO$

$III-$ oxymercuration-demercuration

Given below are two statements:

Statement $I$: Fluorine has most negative electron gain enthalpy in its group.

Statement $II$: Oxygen has least negative electron gain enthalpy in its group.

In the light of the above statements, choose the most appropriate from the options given below.