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प्रश्न
Anaerobic bacteria digest animal waste and produce biogas (Change – A). The biogas is then burnt as fuel (Change – B). The following statements pertain to these changes. Choose the correct one.
विकल्प
Process – A is a chemical change.
Process – B is a chemical change.
Both processes A and B are chemical changes.
None of these processes is a chemical change.
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उत्तर
Both processes A and B are chemical changes.
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 |
Name three reducing agents ?
Fill in the blank
A new substance is formed in a _______ change.
Define chemical reaction.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Sodium chloride
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
What is a chemical reaction?
Mention the various conditions required for a chemical reaction to occur.
Discuss how acid rain occurs due to emission of smoke from vehicles and industries?
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
