Advertisements
Advertisements
प्रश्न
Select the correct answer to the reactant added, to give the product in the preparation of hydrogen gas.
\[\ce{MgO + H2}\]
विकल्प
dilute acid
dilute alkali
cold water
conc. alkali
boiling water
conc. acid
steam
उत्तर
Reactant added to get the product:
\[\ce{MgO + H2:Boiling water}\]
APPEARS IN
संबंधित प्रश्न
Fill in the blank
Hydrogen reacts with metal oxides to form ............and....................
For laboratory preparation of hydrogen, give the following:
chemical equation
Which test should be made before collecting hydrogen in a gas jar?
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Give reason for the following:
The end of the thistle funnel should be dipped under acid.
Choose the correct option:
Elements which show unique nature in the preparation of hydrogen are:
Hydrogen may be prepared in the laboratory by the action of a metal on an acid.
How would you modify your apparatus to collect dry hydrogen? Which drying agent would you employ for this purpose?
Starting from hydrogen gas how would you obtain a neutral liquid.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Complete and balance the equation:
[General method]
Reactions of metals - alkali [conc. soln.]
Zinc - Zn + 2NaOH → ______ + _______ [g]
Zn + 2KOH → ____ + _____ [g]
