MCQ
Which of the following statements is incorrect?
- ✓Mercurous ion exists as $Hg^+$
- BMercurous ion is diamagnetic and exists as dimer $Hg_2^{2+}$
- CMercurous ion is colourless
- DThere is a metallic bond between two $Hg^+$ ions
✓
Answer
Correct option: A.
Mercurous ion exists as $Hg^+$
a
For $Hg^+$, the electron configuration should be $5 d^{10}6 s^1$ with a spin free electron which would make the mercurous compound paramagnetic. However, mercurous compounds are diamagnetic which indicates the absence of any spin free electron [loss of two s electrons not one, to a configuration of dio (noble gas).
For $Hg^+$, the electron configuration should be $5 d^{10}6 s^1$ with a spin free electron which would make the mercurous compound paramagnetic. However, mercurous compounds are diamagnetic which indicates the absence of any spin free electron [loss of two s electrons not one, to a configuration of dio (noble gas).
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
Pick out the correct statement
Which of the following statements about the interstitial compounds is incorrect?
Which of the following oxide is amphoteric in nature?
Hydrogen can be put in halogen group because
Which one of the following compounds does not form an ozonide
Match List $I$ with List $II$
→| List $I$ (Natural amino acid) | List $II$ (Code) |
| $A$ Glutamic acid | $I$ $Q$ |
| $B$ Glutamine | $II$ $W$ |
| $C$ Tyrosine | $III$ $E$ |
| $D$ Tryptophan | $IV$ $Y$ |
Which of the following statements is not correct about rusting of iron?
Which of the indicated $H$ in the following is most acidic?
→(image) $\xrightarrow[{\left( 2 \right)\,{H_2}O,Zn}]{{\left( 1 \right)\,{O_3}}} Product$, Product is
→Given two process :
→$\frac{1}{2}{P_4}(s) + 3C{l_2}(g) \to 2PC{l_3}(l)\,;$ $\Delta H=-635 \,kJ$
$PC{l_3}(l) + C{l_2}(g) \to PC{l_5}(s)\,;$ $\Delta H=-137\, kJ$
The value of heat of formation of $PCl_5$ is ......$kJ\,mol^{-1}$