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Question
Select the correct options for the following statement:
The product formed on combustion of hydrogen in air is ___.
Options
water gas
water
producer gas
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Solution
The product formed on combustion of hydrogen in air is water.
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Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
FILL IN THE BLANK
In electrolysis of water, dilute sulphuric acid is added to increase ..................of water.
Hydrogen gas is collected by the downward displacement of water. Give reason ?
Where does hydrogen occur in a free state?
Complete and balance the following reaction.
Al + KOH + H2O→_____________ +___________
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Sodium - 2Na + 2H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Lead - Pb + 2NaOH → ______ + _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Aluminium - 2Al + 2NaOH + 2H2O → ______ + _______ [g]
2Al + 2KOH + 2H2O → _____ + _____ [g]
Name an element whsich reacts violently with water at room temperature.
State the reactant added to hydrogen to obtain the respective product in following case.
Hydrogen sulphide
