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प्रश्न
Compare hydrogen with alkali metals on the basis of:
Oxide formation
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उत्तर
Hydrogen burns in oxygen to form its oxide. It burns with a pop sound.
2H2 + O2 → 2H2O
Alkali metals also burn vigorously when heated in oxygen to form their respective oxides.
Lithium forms monoxide.
4Li + O2 → 2Li2O
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संबंधित प्रश्न
Define ‘redox reaction’. Give one example.
Identify the substances that are oxidised and the substances that are reduced in the following reaction.
\[\ce{4Na(s) + O2(g) -> 2Na2O(s)}\]
The addition of hydrogen to a substance is called ______ whereas removal of hydrogen is called ______.
Define an oxidation reaction.
TRUE \ FALSE
Hydrogen is a good oxidizing agent.
State, giving reason, whether the substances printed in bold letters have been oxidized or reduced.
Cl2 + H2S → 2HCl + S
Rusting of iron involves a chemical reaction which is a combination of:
Zinc liberates hydrogen gas when reacted with dilute hydrochloric acid whereas copper does not. Explain why?
What is a redox reaction?
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.
