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Question
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{Ca(OH)2 + H2}\]
Options
dilute acid
dilute alkali
cold water
conc. alkali
boiling water
conc. acid
steam
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Solution
Reactant added to get the product:
\[\ce{Ca(OH)2 + H2:Cold water}\]
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Multiple Choice Question
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from acid?
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Complete and balance the following reaction.
Ca + H2O →_____________ +___________
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Select the correct options for the following statement:
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
Complete and balance the equation:
[General method]
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Iron - 3Fe + 4H2O ⇌ ______+ _______ [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.
