Advertisements
Advertisements
Question
Decomposition reactions can occur by electricity
Give balanced reactions.
Advertisements
Solution
Electricity
Electrolysis of water i.e. the decomposition of water into hydrogen and oxygen gas when an electric current is passed through water.
\[\ce{2H2O -> 2H2 + O2}\]
Sunlight:
\[\ce{6CO2 +12 H2O -> C6H12O6 +6H2O +6O2}\]
APPEARS IN
RELATED QUESTIONS
Explain, giving one example of the following chemical changes:
Double decomposition
Explain, giving one example for each of the following chemical changes:
Displacement
State the type of reactions for the following represent and balance the ones that are not balanced.
2H2O2→ 2H2O + O2
Select the correct salt from list II which on thermal decomposition exhibits the change in colour from list I.
| List I | List II |
| 1. Light green to black | A: Copper carbonate |
| 2. White to yellow [heated state] | B: Hydrated Copper sulphate |
| 3. Blue to black | C: Copper nitrate |
| 4. Orange to green | D: Ammonium dichromate |
| 5. Blue to white | E: Zinc nitrate |
State which of the substance given below evolve oxygen gas on thermal decomposition.
Lead nitrate
Convert nitrogen to ammonia by a direct combination reaction.
Give a balanced equation for thermal decomposition of lead nitrate
Give a balanced equation for thermal decomposition of ammonium dichromate
Complete the statement by filling in the blank with the correct word:
Formation of hydrogen chloride from hydrogen and chlorine is an example of __________.
Differentiate between the following:
Synthesis reaction and a substitution reaction.
