Advertisements
Advertisements
प्रश्न
Distinguish by dilute sulphuric acid.
Sodium sulphide and sodium sulphite?
Advertisements
उत्तर
| Sodium sulphide | Sodium sulphite |
|
Sodium sulphite is the sodium salt of sulphurous acid having molecular formula Na2SO3, can be made by dissolving NaOH in H2SO3. In Sodium sulphite, the oxidation state of Sulphur is +4. |
Sodium sulphite (Na2SO3) will effervesce when dilute acid is added giving off a colourless gas with a choking smell (sulphur dioxide), which, if bubbled through acidified dichromate solution will turn it green.
|
|
With Sulphuric acid, sodium sulphide liberates H2S.
\[\ce{Na2S + H2SO4 -> Na2SO4 + H2S}\]
|
With sulphuric acid, sodium sulphite liberates SO2 along with water.
\[\ce{Na2SO3 + H2SO4 -> Na2SO4 + H2O + SO2}\]
|
APPEARS IN
संबंधित प्रश्न
Define catalyst.
FILL IN THE BLANK
Distillation is a method of obtaining pure ............. from a solution.
TRUE \ FALSE
Electrolytic refining is a method in which a thin coating of a metal is done over another metal.
Explain the type of reactions on the basis of the direction of reaction.
Complete the statement by filling the gaps using appropriate term from the terms given in the bracket.
(slow, coloured, arrow, fast, smell, milky, physical, product, chemical, reactant, covalent, ionic, octet, duplet, exchange, sharing, equality sign)
Electron ______ is complete in each hydrogen in a hydrogen molecule.
Distinguish by heating the following in dry test tubs.
Copper Sulphate and copper carbonate
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
True or False. If false, give the correct answer.
Taking a glass of water and freezing it by placing it in the freezer is a chemical change.
______ change results in the change of the substance.
Match the following:
| 1. | Sodium Chloride | a. | CaSO41/2H2O |
| 2. | Calcium sulphate dihydrate | b. | C2H5Oh |
| 3. | Magnesium sulphate hydrate | c. | CaSO4.2H2O |
| 4. | Calcium sulphate hemihydrate | d. | NaCl |
| 5. | Phenol | e. | MgSO4.H2O |
