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प्रश्न
On passing ammonia gas over heated copper oxide for some time, a reddish-brown residue is left behind. What property of ammonia is demonstrated here?
विकल्प
Basic property
Oxidising property
Reducing property
Acidic property
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उत्तर
Reducing property
Explanation:
\[\ce{CuO}\] functions as a reducing agent because it is reduced to \[\ce{Cu}\] (reddish brown ppt.) in the presence of ammonia.
\[\begin{array}{cc}
\ce{3CuO + 2NH3 ->3Cu + N2 + 3H2O}\\
\phantom{..}\ce{\underset{Reduction}{\underline{{\uparrow}\phantom{...................}{\uparrow}}}}\phantom{...............}
\end{array}\]
संबंधित प्रश्न
Write balanced chemical equations for the following:
When the excess of ammonia is treated with chlorine.
A gas ‘P’ gives dense white fumes with chlorine. Its aqueous solution gives a blue colour with copper (II) hydroxide.
- Name the gas P.
- Give its formula.
- Give three uses of P.
Identify the substance underlined:
The organic compound which when solidified, forms an ice like mass.
Name the gas evolved in each of the following cases :
Alumina undergoes electrolytic reduction.
Name the following
Gas obtained by treating chlorine in excess of ammonia.
Name the following
Substance used to dry ammonia
Name the following
Indicator that turns deep pink when treated with NH4OH.
Give balanced reactions for the following conversion:
Ammonia to ammonium carbonate.
Write the equation for:
The preparation of ammonia from ammonium chloride and calcium hydroxide.
Ranjana wants to prove that ammonia is a reducing agent. To demonstrate this, she passes ammonia gas over heated copper oxide. What will she observe?
