Please select a subject first
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MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Miscible liquids having slightly different boiling points can be separated by the
- evaporation
- distillation
- fractional distillation
- sedimentation
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A .............. change is a temporary change.
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In a double decomposition precipitation reaction both the reactants must be ............ soluble.
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On reaction with sulphuric acid solution, barium chloride forms a white precipitate of ........ sulphate.
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........... electrolytes dissociate completely in aqueous state and allow large amount of electricity to flow through it.
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Negatively charged ions are called ..........
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In a ............ change, new substances are formed.
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The new substances formed during a chemical reaction are called the ..................
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Positively charged ions are called ........
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Distillation is a method of obtaining pure ............. from a solution.
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Why is hydrogen called a reducing agent? Give chemical equation to support your answer ?
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................. is present in both living and non-living things.
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The name ‘carbon’ is derived from the Latin word...........
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MATCH THE COLUMNS
| 1 . `H_2` + `CI_2` `→` 2HCI | a. displacement reaction |
| 2. `2FeCI_3`+ `H_2` `→` `2FeCI_2` +2HCI` | b. addition of an electronegative redical |
| 3. Fe + `CuSO_4` `→``FeSO_4` +Cu` | c. removal of an electronegative redical |
| 4. `2H_2O` +`4NO_2`+`O_2` `→` `4HNO_3` | d.reduction by adding hydrogen |
| 5. 3Fe +`3CI_2` `→` `2FeCI_3` | e.electrolysis of water |
| 6. `FeCI_3`+ 3NaOH `→``Fe(OH)_3``↓`+NaCI | F.double decomposition,precipitation reaction |
| 7.`2H_2O` `→` `2H_2``↑`+`O_2` | e. combination or synthesis reaction |
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TRUE \ FALSE
A precipitation reaction takes place only in a solution.
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Choose the correct alternative.
In combined state, carbon occurs as
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TRUE \ FALSE
Copper can displace iron from iron sulphate.
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TRUE \ FALSE
Ammonia is a good oxidizing agent.
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Give the molecular formula of water ?
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TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
Concept: undefined >> undefined
