Advertisements
Advertisements
प्रश्न
Give reason for the following:
Blue solution of copper sulphate changes to green when a piece of iron is added to this solution.
Advertisements
उत्तर
This is because the blue colour of the copper sulphate solution fades and eventually turns into light green due to the formation of ferrous sulphate.
APPEARS IN
संबंधित प्रश्न
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
Complete the statement by filling the gap using an 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)
An ______ is drawn in between the reactants and products while writing the equation for a chemical reaction.
Complete and balance the following reaction:
\[\ce{NH3 + O2 ->[\Delta]}\]
What is observed in performing the following :
| Hydrogen | Oxygen | Carbon dioxide | Chlorine | |
| Litmus test | ||||
| Apply a burning splint to the gas | ||||
| Colour of gas | colourless | colourless | colourless | greenish-yellow |
| Odour of gas |
Give a chemical test to distinguish between the following gases.
H2 and CO2
Select the correct answer for the following options:
The black residue obtained on heating copper carbonate.
Complete the table given below.
| Addition of dil. H2SO4 to FeS | Odour of gas evolved |
______ is not a chemical change.
What is the role of a catalyst in a chemical reaction?
Galvanization is a process in which ______ is coated as a layer of iron.
