Advertisements
Advertisements
प्रश्न
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Advertisements
उत्तर
Sodium reacts violently with acid.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Hydrogen is ..................... than air.
Multiple Choice Question
The metal which reacts with cold water to produce hydrogen is
Hydrogen gas is collected by the downward displacement of water. Give reason ?
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
Which of the metals copper, zinc, magnesium or sodium would be the most suitable?
Complete and balance the following reaction.
Al + H2SO4 →_____________ +___________
Select the correct options for the following statement:
A metal which reacts with water to give a metallic hydroxide & liberate hydrogen.
Complete and balance the equation:
[General method]
Reactions of active metals - cold water
Calcium - Ca + H2O → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Aluminium - 2Al + 2NaOH + 2H2O → ______ + _______ [g]
2Al + 2KOH + 2H2O → _____ + _____ [g]
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
