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प्रश्न
Give a chemical test to distinguish between the following gases.
CO2 and SO2
उत्तर
|
Carbon dioxide |
sulphur dioxide |
| Litmus test: It turns moist blue litmus faint red. | Litmus test: It turns moist blue litmus red and finally bleaches it. This bleaching is temporary. |
| The gas has no effect on filter paper dipped in acidified K2Cr2O7 or KMnO4. | It has no effect on lead acetate paper (Distinct from H2S). This test distinguishes it from H2S. |
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction is a chemical reaction in which there is
- removal of hydrogen
- removal of oxygen
- addition of oxygen
- none of these
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Fill in the blank
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Explain by writing a word equation.
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When electric current is passed through acidulated water ______ of water takes place.
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Gas is evolved
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Define:
Electrochemical reaction
Give one example
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\[\ce{CuCO3 ->[\Delta]}\]
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
Select the correct answer for the following options:
The basic gas obtained when two gases react in presence of a catalyst and the reaction is exothermic.
Match the chemical reactions in List I with the appropriate answer in List II.
| List I | List II | ||
| 1. | \[\ce{XY⇌[heat]X + Y}\] | A: | Displacement reaction |
| 2. | \[\ce{XY->X + Y}\] | B: | Double decomposition |
| 3. | \[\ce{X+Y- + A+B^-->X+B- + A+Y-}\] | C: | Endothermic reaction |
| 4. | \[\ce{X + YZ->XZ + Y}\] | D: | Thermal dissociation |
| 5. | \[\ce{X + Y->[heat]XY -\Delta}\] | E: | Decomposition reaction |
Explain the Silver nitrate solution is kept in coloured reagent bottles in the laboratory.
State the following reaction represent oxidation or reduction.
\[\ce{Fe++->Fe+++}\]
______ is not a chemical change.
Beating an egg to make a cake is a ______.
______ are substances that speed up the process of a chemical change and it will not undergo any change during the course of the reaction.
______ is the chemical name of limestone.
