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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.
Give reason for the following:
Helium replaced hydrogen in weather observation balloons?
Multiple Choice Question
Hydrogen is responsible for producing
MULTIPLE CHOICE QUESTIONS
The name hydrogen was given by
- Cavendish
- Lavoisier
- Haber
- none of these
Write the balanced equation and give your observation when the following metal reacts:
Calcium with cold water
Give the balanced equation of the reaction.
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).
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
Give equations for the reactions.
Give a test to differentiate between two gas jars – one containing pure hydrogen and the other hydrogen-air mixture.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Chlorine acts as an ______ agent.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
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
How can you obtain hydrogen from sodium hydroxide [not by electrolysis].
How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
