Advertisements
Advertisements
Question
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
Advertisements
Solution
As sodium is very reactive and reacts with water violently, darts on the surface of water and collection of hydrogen becomes difficult.
APPEARS IN
RELATED QUESTIONS
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
How did the name 'hydrogen' originate?
Starting from hydrogen gas how would you obtain a basic gas.
Starting from hydrogen gas how would you obtain a metal by reduction of its heated oxide.
Give reason for the following:
In the preparation of hydrogen by electrolysis of water – the distilled water used is acidified.
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 metals with steam
Zinc - Zn + H2O → ______+ _______ [g]
Account for the following fact:
Potassium and sodium are not used to react with dilute ‘hydrochloric acid or dilute sulphuric acid in the laboratory preparation of hydrogen.
State the reactant added to hydrogen to obtain the respective product in following case.
Water
