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प्रश्न
Place the metals calcium, iron, magnesium and sodium in order of their activity with water, placing the most active first. Write the equation for each of the above metals which react with Water.
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उत्तर
Na Sodium 2Na + 2H2O → 2NaOH + H2
Ca Calcium Ca + 2H2O → Ca[OH]2 + H2
Mg Magnesium
Fe Iron
\[\ce{Mg +\underset{\text{(Boiling water)}}{H2O} -> MgO + H2}\]
\[\ce{3Fe + 4H2O (steam)⇌ Fe3O4 + 4H2}\]
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The reaction between hydrogen and nitrogen to form ammonia is reversible.
Give reasons for the following:
Hydrogen can be used as a fuel.
Describe two chemical properties of hydrogen with equations.
Discuss the use of hydrogen as a fuel ?
Give the general group study of hydrogen with reference to
valence electrons
Under what conditions can hydrogen be made to combine with sulphur?
Name the products and write the equation for the reaction.
Under what conditions can hydrogen be made to combine with oxygen?
Name the products and write the equation for the reaction.
With reference to the uses of hydrogen, give reason for the following:
Reaction of hydrogen with nitrogen under specific conditions finds industrial utility.
Why is copper not used to prepare hydrogen by the action of dilute hydrochloric acid or dilute sulphuric acid on the metal, [copper [Cu] below hydrogen – no reaction]
State the use of hydrogen –
In the extraction of metals
