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Question
Compare hydrogen and halogens on the basis of:
reaction with oxygen
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Solution
Hydrogen reacts with oxygen to form a neutral oxide, H2O. Halogens react with oxygen to form acidic oxides like Cl2O and Cl2O7.
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RELATED QUESTIONS
Which of the statements about the reaction below are incorrect?
\[\ce{2PbO(s) + C(s) → 2Pb(s) + CO2(g)}\]
- Lead is getting reduced.
- Carbon dioxide is getting oxidised.
- Carbon is getting oxidised.
- Lead oxide is getting reduced.
In the reaction represented by the equation:
MnO2 + 4HCl → MnCl2 + 2H2O + Cl2
(i) name the substance oxidised.
(ii) name the oxidising agent.
(iii) name the substance reduced.
(iv) name the reducing agent.
Explain oxidation in terms of gain or loss of oxygen with one example.
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(a) oxidation
(b) dehydration
(c) reduction
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Zn + Pb2+→ Pb + Zn 2+
Name:
a gas that is oxidizing as well as a reducing agent.
Name:
a solid that is an oxidizing agent.
Explain the term redox reaction with an example involving the reaction of hydrogen sulphide with chlorine.
Which among the following are physical or chemical change?
Curding of milk
When hydrogen gas is passed over black copper oxide, a reddish-coloured layer of copper is formed.
Answer the questions that follow based on this reaction.
- Write the equation.
- What type of reaction is it?
- Complete the blanks:
In this reaction, an oxygen atom goes away from CuO (copper oxide), which means that ______ of copper oxide takes place, whereas a hydrogen molecule takes up an oxygen atom and water (H2O) is formed, meaning ______ of hydrogen takes place.
