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प्रश्न
Give a balanced equation for a reaction involving the evolution of gas on the addition of dilute acid to sodium sulphite.
उत्तर
Sodium sulphite when reacting with dil. `"H"_2"SO"_4` evolves gas `"SO"_2`.
\[\ce{Na2SO3 + H2SO4 [dil.]->Na2SO4 + H2O + SO2 (g)}\]
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संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
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
Positively charged electrode is called the anode. True or false ?
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Write true or false :
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Explain by writing a word equation.
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(a) Drying of a shirt in the sun.
(b) Rising of hot air over a radiator.
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(d) Change the colour of black tea by adding lemon juice to it.
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