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प्रश्न
Which test should be made before collecting hydrogen in a gas jar?
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उत्तर
Test: Collect some amount of gas in a test tube and take it to a flame.
If the gas burns quietly, then there is no more air in the flask.
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संबंधित प्रश्न
Multiple Choice Question
Water gas is a mixture of
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Why hot concentrated sulphuric acid is not used in the preparation of hydrogen?
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Complete and balance the following reaction.
Zn + NaOH →_____________ +___________
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.]
Zinc - Zn + 2NaOH → ______ + _______ [g]
Zn + 2KOH → ____ + _____ [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.
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
Give a balanced equation for the following conversion.
\[\ce{ZnO<-H2O->Fe3O4}\]
