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प्रश्न
Out of sodium and sulphur which is a metal? Explain its reaction with the oxygen.
उत्तर
Out of sodium and sulphur, sodium is a metal. so sodium reacts with oxygen to form sodium oxide.
\[\ce{\underset{Sodium}{4Na(s)} + \underset{Oxygen}{O2(g)} -> \underset{Sodium oxide}{2Na2O(s)}}\]
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संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Compounds, which in their molten state allow an electric current to pass through them are called
- electrolytes
- non-electrolytes
- non-conductors
- none of these
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 |
TRUE \ FALSE
Weak electrolytes dissociate partially in their aqueous or fused state.
TRUE \ FALSE
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True or false
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A new substance is formed in a _______ change.
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The substances which undergo chemical change are called _______
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No new substance is formed during a chemical reaction.
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A chemical change may involve –
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Write a note on the catalyst.
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Define the following term:
Chemical change
