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Question
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
How would you modify your apparatus to collect dry hydrogen? Which drying agent would you employ for this purpose?
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Solution
The gas is collected by the downward displacement of water.
Common drying agents such as fused calcium chloride, caustic potash stick and phosphorus pentoxide remove water vapor.
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Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
For laboratory preparation of hydrogen, give the following:
method of collection
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
Select the correct options for the following statement:
The metal used as a catalyst in hydrogenation of oils.
Complete and balance the equation:
[General method]
Reactions of metals with steam
Zinc - Zn + H2O → ______+ _______ [g]
Complete and balance the equation:
[Industrial Method - Bosch process]
- Step I - Production of water gas -
\[\ce{C + H2O->[1000°C]}\] [____ + ____] - Δ - Step II - Reduction of steam to hydrogen by carbon monoxide
\[\ce{CO + H2 + H2O->[450°C][Fe2O3]}\] _____ + ____ [g] - Step III - Removal of unreacted carbon dioxide and carbon monoxidefrom the above mixture
KOH + CO2 → _________ + ______
CuCl + CO + 2H2O → _______
State the electronic configuration of hydrogen [at. no. 1].e
Give a reason why hydrogen can be placed in group 1 [1A] and group 17 [VIIA] of the periodic table.
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
State the reactant added to hydrogen to obtain the respective product in following case.
Water
