How many unpaired electrons are there in $N{i^{2 + }}$
How many unpaired electrons are there in $N{i^{2 + }}$
- A
$2$
- B
$4$
- C
$5$
- D
$0$
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Cuprous ion is colourless, while cupric ion is coloured because
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$MnO _4^{-}$oxidises $(i)$ oxalate ion in acidic medium at $333\, K$ and $(ii)$ $HCl$. For balanced chemical equations, the ratios $\left[ MnO _4^{-}: C _2 O _4^{2-}\right]$ in $(i)$ and $\left[ MnO _4^{-}: HCl \right]$ in $(ii)$ respectively are
- [KVPY 2011]
Which of the following statements are correct?
$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
Choose the correct answer from the options given below:
Which of the following statements are correct?
$(A)$ The $M ^{3+} / M ^{2+}$ reduction potential for iron is greater than manganese
$(B)$ The higher oxidation states of first row $d$ block elements get stabilized by oxide ion.
$(C)$ Aqueous solution of $Cr ^{2+}$ can liberate hydrogen from dilute acid.
$(D)$ Magnetic moment of $V ^{2+}$ is observed between $4.4-5.2\,BM$
Choose the correct answer from the options given below:
- [JEE MAIN 2023]
Which of the following ion is diamagnetic
Which of the following ion is diamagnetic
The magnetic moment of a metal ion of first transition series is $2.83 $ $BM$. Therefore it will have unpaired electrons
The magnetic moment of a metal ion of first transition series is $2.83 $ $BM$. Therefore it will have unpaired electrons