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प्रश्न
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
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उत्तर
When powdered zinc reacts with sodium hydroxide it produces hydrogen.
\[\ce{Zn + 2NaOH ->\underset{\text{Sodium zincate}}{Na2ZnO2} + H2}\]
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
State four uses of hydrogen:
Multiple Choice Question
Hydrogen is
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
FILL IN THE BLANK
The compounds of carbon and hydrogen are called .................
FILL IN THE BLANK
Ammonia is used to make ................
Why is hydrogen called a reducing agent? Give chemical equation to support your answer ?
Write the balanced equation and give your observation when the following metal reacts:
Sodium with cold water
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen does not support combustion.
Select the correct options for the following statement:
The gas which has now replaced hydrogen in air balloons is ___.
What do the following symbols [or formula] denote : 2H ; H2 ; H+. [two atoms, molecule, ion]
Write a correctly balanced equation for the following “word equation”:
calcium + water → calcium hydroxide + hydrogen
Write a correctly balanced equation for the following:
When steam is passed over red hot iron.
What do the following symbols represent : 2H and H2.
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.
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
