White silver surface turns black when $O_3$ is passed over it. This is due to the formation of

  • [AIIMS 2011]
  • A

    silver hydroxide

  • B

    freshly reduced silver which is black in colour

  • C

    silver oxide

  • D

    a complex compound of silver and ozone

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$F{e^{2 + }}$ shows

Chloro compound of vanadium has only spin magnetic moment of $1.73\, BM$. This vanadium chloride has the formula:

  • [AIIMS 2019]

Hydrated $C{u^{ + 2}}$ ion will be

In the series $\operatorname{Sc}(Z=21)$ to $\operatorname{Zn}(Z=30)$, the enthalpy of atomisation of zinc is the lowest, i.e.. $126\, kJ\, mol ^{-1}$. Why?

Which of the following has maximum first ionisation energy ?