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प्रश्न
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Potassium- K + H2O → ______+ ______ [g]
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उत्तर
\[\ce{2K + 2H2O -> 2KOH + H2}\] [g]
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संबंधित प्रश्न
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
Which of the metals copper, zinc, magnesium or sodium would be the most suitable?
Why are the following metal not used in the lab. preparation of hydrogen?
iron
Complete and balance the following reaction.
Na + H2O →_____________ +___________
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Lead - Pb + 2NaOH → ______ + _______ [g]
Account for the following fact:
Though lead is above hydrogen in the activity series, it does not react with dilute hydrochloric acid or dilutes sulphuric acid.
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
