Advertisements
Advertisements
Question
Give balanced equation for obtaining hydrogen from cold water using a divalent active metal.
Solution
Divalent active metal Ca :
Ca + 2H2O → Ca[OH]2 + H2
APPEARS IN
RELATED QUESTIONS
Hydrogen is a good reducing agent: What do you understand by the above statement? Explain with the help of copper oxide as an example.
Multiple Choice Question
Hydrogen is
FILL IN THE BLANK
Ammonia is used to make ................
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).
Correct the following statement:
Hydrogen is dried by passing it through conc. H2SO4.
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.
With reference to the equation : Cl2 + H2S → 2HCl + S pertaining to a redox reaction – select the correct answer.
Chlorine acts as an ______ agent.
Give balanced equation for the following conversion:
Water gas to hydrogen – industrially.
Give balanced equation for the following conversion:
Iron [III] oxide to iron – using hydrogen.
Give reason for the following:
The reaction of chlorine with hydrogen sulphide is deemed a redox reaction.
Match the statements in List I with the appropriate answer in List II.
| List I | List II |
| 1. An atom of hydrogen | A: Chromic oxide |
| 2. A strong oxidising agent | B: Ammonia |
| 3. A promoter used in Bosch process | C: Iron |
| 4. A chemical used in the manufavture of fertilizers | D: One electron |
| 5. The catalyst used in production of a basic gas from nitrogen. | E: Dilute nitric acid |
When steam is passed over red-hot iron, magnetic oxide of iron and hydrogen are obtained. “The reaction between steam and red-hot iron is a Reversible Reaction.” What is meant by this statement.
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?
How would you obtain ‘hydrogen from sodium hydroxide’ solution other than by electrolysis?
Complete and balance the following equations:
Al + NaOH + ____ → ____ + ____
Select the correct answer from the symbol in the bracket.
The element, which like hydrogen has one valence electron.
