Advertisements
Advertisements
प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Iron and rust are the same substances.
विकल्प
True
False
उत्तर
This statement is False.
Explanation:
Iron is a metal, while rust is iron oxide, a compound formed when iron reacts with oxygen and moisture.
APPEARS IN
संबंधित प्रश्न
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 |
What are homogenous reactions ?
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Multiple choice:
Which of the following is not a characteristic of a chemical change?
Distinguish by dilute sulphuric acid.
Copper and magnesium?
Explain the term ‘chemical reaction’ with special reference to – ‘reactants’ and ‘products’.
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
State the following reaction represent oxidation or reduction.
\[\ce{Ag->Ag+}\]
The simplest method of preventing rusting of iron is to coat it with oil, grease, or paint. The reason being ______.
Chemical changes are important in our day-to-day life. Give examples.
