Advertisements
Advertisements
प्रश्न
Why are the following metals not used in the lab preparation of hydrogen?
calcium
Advertisements
उत्तर
Calcium is expensive.
APPEARS IN
संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Hydrogen burns in oxygen to form
- hydrogen sulphide
- nitrates
- water
- ammonia
Hydrogen gas is collected by the downward displacement of water. Give reason ?
Complete the following word equation:
Sodium hydroxide + zinc → hydrogen + _________
Give a reason for the following:
Zinc granules are used in the lab preparation of hydrogen.
Give reason for the following:
Purified and dried hydrogen is collected over mercury.
Where does hydrogen occur in a free state?
Correct the following statement:
Hydrogen is separated from CO by passing the mixture through caustic potash solution.
Select the correct options for the following statement:
The acid _____ is not Used in the laboratory preparation of hydrogen, using zinc and an acid.
Complete and balance the equation:
[General method]
Reactions of metals with dilute acids
Aluminium - 2Al + 3H2SO4 → ______+ _______ [g]
Give a balanced equation for the following conversion.
\[\ce{CO + H2<-H2O->CO2 + H}\]
