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प्रश्न
Hydrogen can be prepared with the help of cold water. Give a reaction of hydrogen with:
A monovalent metal
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उत्तर
2K + 2H2O →2KOH + H2
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संबंधित प्रश्न
Name the following:
Two metals which give hydrogen with cold water.
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
Give reason for the following:
Dilute sulphuric acid cannot be replaced by concentrated acid in the preparation of hydrogen.
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
Give reason:
A candle brought near the mouth of a jar containing hydrogen gas starts burning but is extinguished when pushed inside the jar.
Starting from hydrogen gas how would you obtain a neutral liquid.
Select the correct options for the following statement:
The metal which reacts with steam liberating hydrogen & the reaction is reversible.
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.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
