Advertisements
Advertisements
प्रश्न
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
Advertisements
उत्तर
As sodium is very reactive and reacts with water violently, darts on the surface of water and collection of hydrogen becomes difficult.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
reacts with hot water to form copper oxide and hydrogen.
Why nitric acid is not used in the preparation of hydrogen?
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
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?
Why are the following metals not used in the lab. preparation of hydrogen?
sodium
Complete and balance the following reaction.
Zn + HCl →_____________ +___________
Complete and balance the following reaction.
Zn + NaOH →_____________ +___________
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 - alkali [conc. soln.]
Zinc - Zn + 2NaOH → ______ + _______ [g]
Zn + 2KOH → ____ + _____ [g]
State the reactant added to hydrogen to obtain the respective product in following case.
Ammonia
