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प्रश्न
Give an example of the following chemical changes.
A reaction where colour change is noticed.
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उत्तर
Colour change
A few pieces of iron are added into a blue coloured copper sulphate solution; the blue colour of copper sulphate fades and eventually turns into light green due to the formation of ferrous sulphate.
Fe + CuSO4 → FeSO4 + Cu
APPEARS IN
संबंधित प्रश्न
Write the missing reactants and products and balance the equations.
................+ HCI `→` NaCI + `"H"_2"O"` + .........................
MULTIPLE CHOICE QUESTIONS
Tick the most appropriate answer.
Which one of the following alters the rate of the chemical reaction without itself undergoing any change?
- temperature and Pressure
- concentration of reactants
- presence of catalyst
- none of these
Define electrolysis.
Copper carbonate when heated, it turns :
Balance the following equation :
Fe + H2O → Fe3O4 + H2
Give an example of a reaction where the following are involved
Light
State the original colour of the following substance and colour of residue obtained after heating.
Copper carbonate
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Name the following:
The type of change physical or chemical involved – ‘during respiration in human beings’.
Analogy:
H2O: Water:: NaCl: ______.
