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प्रश्न
Explain by writing a word equation.
Respiration is a chemical change.
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उत्तर
Respiration is a continuously occurring biological process. In this process air is inhaled, oxygen present in this inhaled air reacts with glucose present in the cells of the body forming carbon dioxide and water. The word equation and the chemical equation of this chemical reaction are as follows: (Here, the chemical equation is not balanced.)
Word equation:
\[\ce{Glucose + Oxygen ->[respiration] Carbon dioxide + Water}\]
संबंधित प्रश्न
Changes in which new substances are formed are called ______ changes.
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 |
Fill in the blank:
The substances which undergo chemical change are called _______
Explain the following reaction with one suitable example of Decomposition reaction
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Potassium fluoride
Give an example of a reaction where the following are involved:
Close contact
Complete and balance the following reaction:
Pb(NO3)2 + KI →
What do you observe when CO2 is passed through lime water first and then a little in excess.
Give reason for the following:
Electrolytic decomposition of water is a reaction involving change of state.
The water we drink is a combination of hydrogen and oxygen.
