मराठी

Identify the substances that are oxidised and the substances that are reduced in the following reaction. CuO(s)+HA2(g)⟶Cu(s)+HA2O(l)

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प्रश्न

Identify the substances that are oxidised and the substances that are reduced in the following reaction.

\[\ce{CuO_{(s)} + H2_{(g)} -> Cu_{(s)} + H2O_{(l)}}\]

अति संक्षिप्त उत्तर
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उत्तर

In the given reaction hydrogen is being oxidised and Cu is being reduced.

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पाठ 1: Chemical Reactions and Equations - Intext Questions [पृष्ठ १३]

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एनसीईआरटी Science [English] Class 10
पाठ 1 Chemical Reactions and Equations
Intext Questions | Q 8. (iI) | पृष्ठ १३

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संबंधित प्रश्‍न

Define corrosion.


Identify in the following reaction (a) the substance oxidised, and (b) the substance reduced:

\[\ce{ZnO + C -> Zn + CO}\]


Name the following:

The process in which oxygen is added or hydrogen is removed.


Give the general group study of hydrogen with reference to

burning


Describe briefly the ionic concept of oxidation and reduction. Give an equation to illustrate.


Is it essential that oxidation and reduction must occur side by side in a chemical reaction? Explain


State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.

PbO + CO → Pb + CO2


State whether the following conversion is oxidation or reduction:

PbO2 + SO2→ PbSO4 


 Complete and balance the following equation:

H2 + S → ___________


With reference to oxidation & reduction reaction – complete the statement given by filling in the blanks with only the words (a) Addition (b) Removal.

‘Oxidation is a chemical reaction involving ____ of oxygen to a substance or ____ of hydrogen from a substance. Reduction on the otherhand involves ____ of hydrogen to a substance or ____ of oxygen from a substance.


Write chemical formula for rust.


Find the oxidation number of the elements in the following compounds. 

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  2. Mn in MnSO4
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Identify the oxidising agent (oxidant) in the following reactions

`"V"_2"O"_5 + 5"Ca" -> 2"V" + 5"CaO"`


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______ is a metal that has a high resistance to corrosion.


Choose the odd one out and write the reason:


Identify the type of chemical reaction given below:

\[\ce{2Mg + O2 -> 2MgO}\]


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MnO2 + 4HCl → MnCl2 + 2H2O + Cl2


State whether the given chemical reaction is a redox reaction or not. Justify your answer.

\[\ce{MnO_2 + 4HCl->MnCl_2 +2H_2O + Cl_2}\]


A reddish brown metal used in electrical wires when powdered and heated strongly turns black. When hydrogen gas is passed over this black substance, it regains its original colour. Based on this information answer the following questions:

  1. Name the metal and the black substance formed.
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