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प्रश्न
Give an example of double displacement reaction, where a gas is evolved.
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उत्तर
\[\ce{Na2S + 2HCI -> 2NaCI + H2S ↑}\]
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संबंधित प्रश्न
(a) Define the neutralization reaction with an example.
(b) Give a balanced equation for this reaction.
(c) Give three applications of neutralization reactions.
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State the type of reactions for the following represent and balance the ones that are not balanced.
CaCO3→ CaO+ CO2
Define the following type of chemical change or reaction with a suitable example.
Direct combination reaction or synthesis
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Give a reason why zinc displaces hydrogen from dilute sulphuric acid but copper does not.
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Complete the statement by filling in the blank with the correct word:
Formation of hydrogen chloride from hydrogen and chlorine is an example of __________.
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 |
