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प्रश्न
Why nitric acid is not used in the preparation of hydrogen?
उत्तर
Nitric acid is a powerful oxidising agent, and the oxygen formed due to its decomposition oxidises hydrogen to give water thus defeating the purpose of the reaction.
3Zn + 8HNO3 → 3Zn(NO3)2 + 4H2O + 2NO
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संबंधित प्रश्न
Fill in the blank
Hydrogen reacts with metal oxides to form ............and....................
FILL IN THE BLANK
........................... means ‘maker of water’ in Greek.
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A monovalent metal
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Fe + HCl →_____________ +___________
Complete and balance the equation:
[General method]
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Iron - 3Fe + 4H2O ⇌ ______+ _______ [g]
Name an element whsich reacts violently with water at room temperature.
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Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table.
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Ca(OH)2 + H2}\]
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
Give a balanced equation for the following conversion.
\[\ce{KAlO2<-KOH->K2ZnO2}\]
