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प्रश्न
Give reason for the following:
The catalytic oxidation of sulphur dioxide to sulphur trioxide is represented by a double arrow {⇌}
between the reactants and products, formed in the chemical reaction.
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उत्तर
The reaction is reversible shown by the double arrow.
The Equation of Oxidation of sulphur dioxide to sulphur trioxide is as follows:
\[\ce{2SO2 + O2 ⇌[V2O5][450°C] 2 SO3 + \triangle}\]
[Vanadium pentoxide (V2O5) - catalyst]
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संबंधित प्रश्न
Define catalyst.
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
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 |
Explain the following reaction with one suitable example of Decomposition reaction
Name the type of chemical reaction shown by the following equation:
Fe + CuSO4 → FeSO4 + Cu
Define the following term:
Precipitate
Give an example of the following chemical change.
Two gases combine to form white solid
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Give a chemical test to distinguish between the following gases.
HCl and Cl2
Select the correct answer for the following options:
The gas obtained when potassium chlorate is heated in the presence of a catalyst.
Select the correct answer for the following options:
The gas which reacts with oxygen to give a neutral liquid.
A chemical reaction is often accompanied by external indications or characteristics which include –
- Colour change
- Effervescence or gas evolved
- Evolution or absorption of heat
- Formation of a precipitate.
With reference to each of the above indications, state the external indication seen during – Thermal decomposition of mercury [II] oxide.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Copper nitrate.
Name the solid residual product formed reaction and state its colour during – thermal decomposition of the following substance.
Calcium hydroxide.
A reaction between an acid and a base is called ______.
On heating calcium carbonate gets converted into calcium oxide and carbon dioxide.
(a) Is this a physical or a chemical change?
(b) Can you prepare one acidic and one basic solution by using the products formed in the above process? If so, write the chemical equation involved.
Give two examples for the following case:
Chemical changes
Vanaspati is obtained from vegetable oils by the addition of ______ to the oils.
Write a note on the following:
Curdling of milk
When milk is mixed with coffee decoction, the colour of milk and decoction changes due to ______.
