MCQ
Select Paramagnetic molecule
$(A)\,\, KO_2$
$(B)\,\,$ cis $-[Co(en)_2Cl_2]^+$
$(C)\,\, K_3[Co(Ox)_3]$
$(D)\,\,[CoCl_3]^{2-}$
- A$A, B, C$
- ✓$A, D$
- C$B, C, D$
- D$A, C, D$
✓
Answer
Correct option: B.
$A, D$
b
$K O_{2}$ is a paramagnetic molecule as it is a superoxide having $O_{2}^{-}$ ion. In (b) \&
(c), $C o^{3+}$ is present containing $6 d$ electrons. However all these electrons are
paired up due to presence of strong field ligands. $(d)$ has $C o^{2+}$ ions with $7 d$ electrons, out of which 3 are unpaired due to presence of weak field ligand $C l$. Hence $K O_{2}$ and $\left[ CoCl _{3}\right]^{2-}$ are paramagnetic molecules.
$K O_{2}$ is a paramagnetic molecule as it is a superoxide having $O_{2}^{-}$ ion. In (b) \&
(c), $C o^{3+}$ is present containing $6 d$ electrons. However all these electrons are
paired up due to presence of strong field ligands. $(d)$ has $C o^{2+}$ ions with $7 d$ electrons, out of which 3 are unpaired due to presence of weak field ligand $C l$. Hence $K O_{2}$ and $\left[ CoCl _{3}\right]^{2-}$ are paramagnetic molecules.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Which of the following names are incorrect?
If the order of the reaction $x+y\xrightarrow{hv}x\,y$ is zero, it means that the rate of
→Calculate the half life of the first-order reaction
→$C_2H_4O(g) \longrightarrow CH_4(g) + CO(g)$ If the initial pressure of $C_2H_4O(g)$ is $80\, mm$ and total pressure at the end of $20\, minutes$ is $120\, mm$ ............ $\min$
$R-COOH$ $\xrightarrow{{\operatorname {Reagent}}}$ $R-CH_2-OH$
→suitable reagent for the above conversion is
In which of the following reactions heterogenous catalysis is involved?
→- $2\text{SO}_2(\text{g})+\text{O}_2(\text{g})\xrightarrow{\text{NO(g)}}2\text{SO}_3(\text{g})$
- $2\text{SO}_2(\text{g})\xrightarrow{\text{Pt(s)}}2\text{SO}_3\text{(g)}$
- $\text{N}_2(\text{g})+3\text{H}_2\text{(g)}\xrightarrow{\text{Fe(s)}}2\text{NH}_3\text{(g)}$
- $\text{CH}_3\text{COOCH}_3(1)\text{H}_2\text{O}(1)\xrightarrow{\text{HC}(1)}\text{CH}_3\text{COOH}\text(\text{aq})+\text{CH}_3\text{OH}(\text{aq})$
Which is a coordination compund?
An ore of tin containing $\ce{FeCrO_4}$is concentrated by:
→Which of the following elements has the highest third ionization enthalpy?
Which of the following species can act as reducing agent ?
Major product of the following reaction is.
