Advertisements
Advertisements
प्रश्न
Give reason for the following:
A characteristic change of colour is seen when a piece of iron is added to copper [II] sulphate solution.
Advertisements
उत्तर
A characteristic change of colour is seen when piece of iron is added to Copper (II) sulphate Solution. This is because iron displaces copper from the copper sulphate solution and forming ferrous sulphate
CuSO4 + Fe → FeSO4 + Cu.
Hence, Blue colour of the solution in changes to pale green and there is a reddish brown deposits on copper.
APPEARS IN
संबंधित प्रश्न
When carbon dioxide is passed through lime water, it turns milky due to the formation of ______.
When baking soda is mixed with lemon juice, bubbles are formed with the evolution of a gas. What type of change is it? Explain.
Fill in the blank
A catalyst either ................or ............... the rate of a chemical change but itself remains ............... at the end of the reaction.
Define precipitation reaction.
TRUE \ FALSE
The evolution of a gas during a chemical reaction is shown by an arrow pointing downwards. True or false ?
State what you would observe when the following substance is heated in a glass test tube Copper (II) carbonate Red lead .
When electric current is passed through acidulated water ______ of water takes place.
Give an example of a reaction where the following are involved
Heat
Give an example of a reaction where the following are involved
Electricity
Define an electrochemical reaction.
Write the chemical reaction where the following changes are observed.
Gas is evolved
Name affects the acidified K2Cr2O7 paper and also turns lime water dirty milky.
Name: Two carbonates do not produce carbon dioxide on heating.
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Give a chemical test to distinguish between the following gases.
CO2 and SO2
Represent the addition of dilute sulphuric acid to zinc by means of a chemical equation. State the function of the arrow between the reactants and products.
Complete the table given below.
| Heat on iodine crystals | Colour of vapours evolved |
A chemical reaction is often accompanied by external indications or characteristics.
What happens when cane sugar is strongly heated? Mention any two changes in it.
______ is the chemical name of rust.
