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Question
Complete and balance the following reaction.
Al + KOH + H2O→_____________ +___________
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Solution
2Al + 2KOH + 2H2O →2KAlO2 + 3H2
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Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
MULTIPLE CHOICE QUESTIONS
Hydrogen burns in oxygen to form
- hydrogen sulphide
- nitrates
- water
- ammonia
Hydrogen gas is collected by the downward displacement of water. Give reason ?
How do different metals displace hydrogen from water? Explain with the help of equations.
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
On heating which of the following substances i.e. copper carbonate, zinc carbonate, washing soda, copper sulphate, zinc nitrate, copper nitrate, lead nitrate, ammonium chloride and ammonium dichromate – relate to the reaction given below.
A white substance which leaves an amphoteric oxide as a residue [whose colour varies in the heated and in the cold state] and evolves a gas which turns lime water milky.
State the condition and give balanced equation for the conversion of water gas to hydrogen – in the Bosch process.
