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प्रश्न
Write the balanced equation and give your observation when the following metal reacts:
Magnesium with steam
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उत्तर
Magnesium burns in steam with an intense white light liberating hydrogen gas and white ash, i.e. magnesium oxide.
Mg + H2O → MgO + H2
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संबंधित प्रश्न
Indicate which of the following statement is true and which is false:
The hydrogen molecule is monovalent.
Hydrogen is combustible as well as a supporter of combustion.
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
MULTIPLE CHOICE QUESTIONS
Which is the lightest of all elements?
- hydrogen
- helium
- lithium
- none of these
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 .................
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 is a combustible gas.
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.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
Give a chemical test to distinguish between the following gases:
Ammonia and hydrogen chloride
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’.
Write down the “word equation” for the following reaction:
sodium hydroxide solution + zinc → ?
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
