Advertisements
Advertisements
प्रश्न
For laboratory preparation of hydrogen, give the following:
fully-labeled diagram
उत्तर
APPEARS IN
संबंधित प्रश्न
Which test should be made before collecting hydrogen in a gas jar?
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
Which of the acids dilute sulphuric, concentrated sulphuric, dilute nitric acid and concentrated nitric acid would you choose? Explain why you would not use the acids you reject.
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Complete and balance the following reaction.
Fe + H2O →_____________ +___________
State how hydrogen occurs in the free state. Name three compounds containing hydrogen in the combined state.
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.
Select the correct options for the following statement:
A foul smelling gas formed when hydrogen reacts with a molten non-metal, is ___.
State why hydrogen is not prepared in the laboratory by the action of sodium with cold water.
