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Give a balanced equation for the following type of reaction:
A direct combination reaction between phosphorus and neutral gas.
Concept: undefined >> undefined
Give a balanced equation for the following type of reaction:
A soluble salt of lead formed from an insoluble base by double decomposition – neutralization.
Concept: undefined >> undefined
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Give a balanced equation for the following type of reaction:
A thermal decomposition reaction of a salt – which results in the formation of nitrogen gas.
Concept: undefined >> undefined
Give a balanced equation for the following type of reaction:
A synthesis reaction between a metal and a non-metal resulting in the formation of an insoluble salt of iron.
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Give a balanced equation for the following type of reaction:
A decomposition reaction of a salt which leaves behind a silvery metal.
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Differentiate between the following:
Synthesis reaction and a substitution reaction.
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Differentiate between the following:
Thermal decomposition & thermal dissociation.
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Differentiate between the following:
Decomposition reaction and a double decomposition reaction.
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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 |
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Give reason for the following:
Though hydrogen is lighter than air it cannot be collected by downward displacement of air.
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Correct the following statement:
A molecule of sulphur is monoatomic.
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Explain why:
Burns caused by steam are more severe than burns caused by boiling water.
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Give equations to show what happens when temporary hard water is
Boiled
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Give equations to show what happens when temporary hard water is
Treated with slaked lime
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What is the contribution of the following in atomic structure?
Maharshi Kanada
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In what respects do the three isotopes of hydrogen differ? Give their structures.
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Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
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Draw the electron dot structure of this compound.
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Compare:
Chlorine atom and chloride ion, with respect to
Atomic structure
Electrical state
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