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प्रश्न
Changes in which new substances are formed are called ______ changes.
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उत्तर
Changes in which new substances are formed are called chemical changes.
Explanation:
Chemical changes result in the formation of one or more new substances with different properties from the original.
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 |
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Choose the correct option from the bracket and explain the statement giving reason.
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Give balanced equation for the following conversion affected by heat alone on the substance:
Zinc nitrate to nitrogen dioxide
State whether the following reaction is oxidation or reduction.
\[\ce{Na->Na+}\]
Water boiling into water vapour is an example of chemical change.
______ occurs in the absence of air and in the presence of micro-organisms such as yeast.
