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प्रश्न
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
PbO + CO → Pb + CO2
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उत्तर
PbO in the given reaction is reduced to Pb by losing oxygen.
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संबंधित प्रश्न
Define ‘redox reaction’. Give one example.
Give one example of an oxidation-reduction reaction which is also a displacement reaction.
Explain the following in term of gain or loss of oxygen with two examples.
Oxidation
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
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Cu2+ + 2 e-→ Cu
Divide the following reactions into oxidation and reduction half-reaction:
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With reference to oxidation & reduction reaction – complete the statement given by filling in the blanks with only the words (a) Addition (b) Removal.
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Find the oxidation number of the elements in the following compounds.
- C in CO2
- Mn in MnSO4
- N in HNO3
Which among the following are physical or chemical change?
Burning of Liquefied Petroleum Gas (LPG)
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:
- Name the metal and the black substance formed.
- Write balanced chemical equations for the two reactions involved in the above information
