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प्रश्न
Name the following:
Two metals which give hydrogen with cold water.
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उत्तर
Sodium (Na) and Potassium (K) give hydrogen with cold water.
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........................... means ‘maker of water’ in Greek.
Which metal is preferred for the preparation of hydrogen?
from water?
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
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 dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Give a balanced equation for obtaining hydrogen from?
Steam using a metal – and the reaction is reversible.
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
