Back to d & f- BLOCK ELEMENTS

JEE CHEMISTRY MCQ: d & f- BLOCK ELEMENTS

1 Medium

1 of 1

Understanding +4 | -1

From gold aurocyanide

\mathrm{Na}\left[ {\mathrm{Au}{{\left( {\mathrm{CN}} \right)}_2}} \right]

, gold can be precipitated by adding powder of:

View answer and explanation

Correct option: A

Zn

Option A (Zn) is correct because Zinc is more reactive than Gold and can displace it from the aurocyanide complex.

More Questions from d & f- BLOCK ELEMENTS

Practice All Chapter MCQs →

Mercury is transported in metal containers made of: Cadmipone is a mixture of: The number of element from the following that do not belong to lanthanoids is :
Eu, Cm, Er, Tb, Yb and Lu Statement-I:

{Sm}^{3+}

{Dy}^{3+}

have same colour (yellow).

Statement-II: Both ions are having same number of unpaired electrons. The most common oxidation state of Lanthanoid
elements is +3. Which of the following is likely to
also form other oxidation state? A mixture of

\mathrm{Ti}{\mathrm{O}_2}

\mathrm{BaS}{\mathrm{O}_4}