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प्रश्न
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
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उत्तर
Sodium reacts violently with acid.
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संबंधित प्रश्न
Multiple Choice Question
Water gas is a mixture of
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
How did the name 'hydrogen' originate?
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A divalent metal
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Lead - Pb + 2NaOH → ______ + _______ [g]
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Fe3O4 + H2}\]
