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प्रश्न
Decomposition reactions can occur by electricity
Give balanced reactions.
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उत्तर
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:
\[\ce{6CO2 +12 H2O -> C6H12O6 +6H2O +6O2}\]
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संबंधित प्रश्न
The reaction of iron nail with copper sulphate solution is ______ reaction.
Decomposition brought about by heat is known as thermal decomposition. What is the difference between thermal dissociation and thermal decomposition?
State the type of reactions for the following represent and balance the ones that are not balanced.
2H2O2→ 2H2O + O2
State the type of reactions for the following represent and balance the ones that are not balanced.
PbO + 2HNO3→ Pb(NO3) + 2H2O
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.
Washing soda
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{SO2 + 2H2O + Cl2->2HCl + H2SO4}\]
Give a balanced equation for the following reaction of synthesis involving the formation of:
An alkali – from a basic oxide – sodium oxide
Give a balanced equation for the following type of reaction:
A direct combination reaction between phosphorus and neutral gas.
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II |
| 1. \[\ce{AB⇌[heat]A + B}\] | A: Double decomposition |
| 2. \[\ce{AB->A + B}\] | B: Thermal dissociation |
|
3. \[\ce{X+Y- + AB+B- ->X+B- + A+Y-}\] |
C: Endothermic reaction |
| 4. \[\ce{X + YZ->XZ + Y}\] | D: Displacement reaction |
| 5. \[\ce{X + Y->[heat]XY - \Delta}\] | E: Decomposition reaction |
