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प्रश्न
Give a chemical test to distinguish between the following gases:
Hydrogen and oxygen
उत्तर
Hydrogen: Bums with a pale-blue flame when a burning splint is brought near it.
Oxygen: The gas turns an alkaline solution of pyrogallol dark brown.
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
Hydrogen is combustible as well as a supporter of combustion.
Indicate which of the following statement is true and which is false:
Hydrogen gas is easily liquefiable.
Complete and balance the following equation:
H2+____________→ 2HCI
Give reason for the following:
A pop sound produced when hydrogen is burnt?
Write the balanced equation and give your observation when the following metal reacts:
Sodium with cold water
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Hydrogen sulphide is ______ to sulphur since the reaction involves ______ of hydrogen.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
Give balanced equation for the following conversion:
Nitrogen to a basic gas – using hydrogen.
Select the correct options for the following statement:
The gas which has now replaced hydrogen in air balloons is ___.
Give a chemical test to distinguish between the following gases:
Ammonia and hydrogen chloride
What do the following symbols [or formula] denote : 2H ; H2 ; H+. [two atoms, molecule, ion]
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
What do you observe when a piece of sodium is dropped into cold water?
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
Write balanced equation of the reaction in the preparation of : hydrogen from a solution of potassium hydroxide [other than by electrolysis].
Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
