Advertisements
Advertisements
प्रश्न
Distinguish by dilute sulphuric acid.
Sodium Sulphite and sodium carbonate?
उत्तर
| Sodium Sulphite | Sodium carbonate |
| 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 carbonate (Na2CO3) will effervesce when dilute acid is added and a colourless, odourless gas (carbon dioxide) will be given off which, if bubbled through lime-water, will turn it cloudy. |
|
Gas evolved is SO2. |
The gas evolved is carbon dioxide. |
APPEARS IN
संबंधित प्रश्न
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Reduction reaction is the exact opposite of
- displacement reaction
- decomposition reaction
- oxidation reaction
- none of these
FILL IN THE BLANK
A .............. change is a temporary change.
What are homogenous reactions ?
Is kerosene an electrolyte or a non-electrolyte ?
Write true or false :
When iron and sulphur are heated together a grey mass is formed which is attracted by a magnet .
A chemical equation is a statement that describes a chemical change in terms of
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.
Water
When electric current is passed through acidulated water ______ of water takes place.
Define Photochemical reaction
Give an example
What do you observe? When
Barium chloride is added to sodium sulphate solution
State the original colour of the following substance and colour of residue obtained after heating.
Lead nitrate
Complete the table given below.
| Flame test for calcium chloride | Acid used for flame test |
State the following reaction represent oxidation or reduction.
\[\ce{Cl- ->Cl}\]
Can a nickel spatula be used to stir copper sulphate solution? Justify your answer.
A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.
What changes do you expect?
______ is the chemical name of rust.
Collect information about the types of fuels used for cooking in your area. Discuss with your teachers/parents/others which fuels are less polluting and why.
