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प्रश्न
Why are the following metals not used in the lab preparation of hydrogen?
calcium
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उत्तर
Calcium is expensive.
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संबंधित प्रश्न
Hydrogen gas is collected by the downward displacement of water. Give reason ?
How do different metals displace hydrogen from water? Explain with the help of equations.
For laboratory preparation of hydrogen, give the following:
materials used
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Starting from hydrogen gas how would you obtain a basic gas.
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Iron - 3Fe + 4H2O ⇌ ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Lead - Pb + 2NaOH → ______ + _______ [g]
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
