Which of the following metals forms an amphoteric oxide?

  • A
    $Ca$
  • B
    $Fe$
  • C
    $Cu$
  • D
    $Zn$

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Which of the following properties is $NOT$ correct for alkali metals?

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Match the following:
Metal Ore
$1$. Sodium $a$. Barite
$2$. Potassium $b$. Carnallite
$3$. Barium $c$. Beryl
$4$. Beryllium $d$. Chile saltpetre

Which one of the following alkali metals is the weakest reducing agent as per their $E^{\circ}$ values?

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