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प्रश्न
How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
उत्तर
By adding aluminium powder in cone, sodium hydroxide.
\[\ce{2Al + 6NaOH ->\underset{\text{sodium aluminium}}{2Na3AlO3} + 3H2}\]
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
Hydrogen gas is easily liquefiable.
Give reason for the following:
A pop sound produced when hydrogen is burnt?
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
Give a balanced chemical equation for the reaction.
MULTIPLE CHOICE QUESTIONS
The name hydrogen was given by
- Cavendish
- Lavoisier
- Haber
- none of these
FILL IN THE BLANK
Ammonia is used to make ................
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
Choose terms from the options given in brackets to complete this sentence.
A metal …………….. hydrogen in the activity series gives hydrogen with …………… acid or …………… acid.
(above, below, dilute hydrochloric, concentrated hydrochloric, dilute sulphuric).
Using a burning candle and a jar of hydrogen – how would you prove experimentally that Hydrogen is a combustible gas.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
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 balanced equation for the following reaction:
magnesium + dil. hydrochloric acid → ___
Explain the following:
Two jars of H2 are collected – “one burns quietly and the other does not”.
Write correctly the balanced equation for the following:
‘When zinc filings are added to a concentrated solution of sodium hydroxide’.
Describe one chemical test applied to the following gases, which would enable you to distinguish between them :‘carbon monoxide and hydrogen’.
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
What do the following symbols represent : 2H and H2.
Give balanced equation for obtaining hydrogen from cold water using a monovalent active metal.
