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प्रश्न
Differentiate between the following:
Decomposition reaction and a double decomposition reaction.
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उत्तर
Decomposition reaction and double decomposition reaction:
- Decomposition reaction: A compound decomposes into two or more new substances.
\[\ce{\underset{\text{orange}}{[NH4]2Cr2O7}->\underset{\text{green}}{Cr2O3} + 4H2O + N2}\] - Double decomposition: “Two substances exchange their ions and two new substances are produced one of which is insoluble i.e. ppt.”
\[\ce{AB + CD->AD + CB}\]
\[\ce{CaCl2 + Na2CO3->\underset{\text{ppt.}}{CaCO3} + 2NaCl}\]
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संबंधित प्रश्न
State the type of reactions for the following represent and balance the ones that are not balanced.
PbO2 + SO2→ PbSO4
State the type of reactions for the following represent and balance the ones that are not balanced.
AgNO3 + NaCl → AgCl + NaNO3
Multiple choice:
The reaction BaCl2(aq) + H2SO4(aq) → BaSO4(s) + 2HCl(aq) is
What is a double displacement reaction?
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.
Zinc carbonate
Define the following type of chemical change or reaction with a suitable example.
Double decomposition reaction
Give a balanced equation for thermal decomposition of ammonium dichromate
Name a metallic oxide which on thermal decomposition is reduced to metal.
Define the term – double decomposition – neutralization reaction.
