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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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| 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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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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TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
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TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
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TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
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TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
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TRUE \ FALSE
Positively charged electrode is called the anode. True or false ?
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TRUE \ FALSE
Temperature at which a liquid starts boiling is known as the boiling point of that liquid. True or false ?
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What are chemical reactions?
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What are biocatalysts ?
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How is precipitate formation in a chemical reaction indicated?
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What are homogenous reactions ?
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Define electrolysis.
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