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प्रश्न
A metal oxide that is reduced by hydrogen is
पर्याय
Al2O3
CuO
CaO
Na2O
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उत्तर
CuO
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संबंधित प्रश्न
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{4Na(s) + O2(g) -> 2Na2O(s)}\]
Identify the component oxidised in the following reaction:
H2S + Cl2 → S + 2HCl
Define an oxidation reaction.
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
H2S + Cl2→ 2HCl + S
Divide the above equation into oxidation and reduction half-reactions.
Which of the following statements about the given reaction are correct?
\[\ce{3Fe_{(s)} + 4H2O_{(g)} -> Fe3O4_{(s)} + 4H2_{(g)}}\]
(i) Iron metal is getting oxidised.
(ii) Water is getting reduced.
(iii) Water is acting as the reducing agent.
(iv) Water is acting as oxidising agent.
Identify the oxidising agent (oxidant) in the following reactions
`3"Fe" + 4"H"_2"O" -> "Fe"_3"O"_4 + 4"H"_2`
Which among the following are physical or chemical change?
Heating of an iron rod to red hot
Find the oxidation number of the element in the following compound.
Mg in MgO
State the change in colour observed in following case mentioning the reason:
Copper powder is strongly heated in air.
