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प्रश्न
Define the following type of chemical change or reaction with a suitable example.
Displacement reaction or substitution reaction
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उत्तर
Displacement Reaction Or Substitution Reaction :
“Those reactions in which one element takes place of another element in a compound, are known as substitution reactions”.
\[\ce{\underset{\text{silver white}}{Zn} + \underset{\text{blus solution}}{CuSO4}->\underset{\text{colourless solution}}{ZnSO4} + \underset{\text{red brown}}{Cu}}\]
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संबंधित प्रश्न
Explain, giving one example of the following chemical change:
Thermal dissociation
Explain, giving one example for each of the following chemical changes:
Displacement
(a) What is synthesis?
(b) What kind of chemical reaction is synthesis? Support your answer by an example.
Multiple choice:
The reaction BaCl2(aq) + H2SO4(aq) → BaSO4(s) + 2HCl(aq) is
State which of the substance given below evolve oxygen gas on thermal decomposition.
Lead nitrate
Complete the table given below.
| Heat on Copper Nitrate | Colour of acidic gas evolved |
The reaction can be classified as:
State which of the following type, take place in the reaction is given below.
\[\ce{4HNO3->4NO2 + 2H2O + O2}\]
Give a balanced equation for thermal decomposition of calcium hydroxide
State the double decomposition – neutralization reaction with a suitable representation.
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 |
