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प्रश्न
Write a correctly balanced equation for the following “word equation”:
calcium + water → calcium hydroxide + hydrogen
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उत्तर
Ca + 2H2O → Ca[OH]2 + H2
संबंधित प्रश्न
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.
Give reason for the following:
A pop sound produced when hydrogen is burnt?
State four uses of hydrogen:
Multiple Choice Question
Equal volumes of hydrogen and chlorine are exposed to diffused sunlight to prepare
Multiple Choice Question
Hydrogen is
FILL IN THE BLANK
In nature, hydrogen occurs as a .................. molecule represented as H2
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
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.
Chlorine is ______ to HCl.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
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:
Hydrogen and oxygen
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 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?
Give a reason for the following.
A mixture of hydrogen and chlorine can be separated by passage through a porous pot.
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
