Advertisements
Advertisements
प्रश्न
What do you observe when dilute sulphuric acid is added to the following:
Sodium Sulphide
Advertisements
उत्तर
The reaction between dil. sulphuric acid and sodium sulphite occurs in two steps and is a double replacement reaction.
In the first step, sulphuric acid reacts with sodium sulphide to give sodium sulphate and sulphurous acid.
\[\ce{H2SO4 + Na2SO3 -> Na2SO4 + H2SO3}\]
In the second step, sulphurous acid, which is highly unstable decomposes spontaneously into sulphur dioxide and water.
\[\ce{H2SO3 -> SO2 + H2O}\]
Thus, the overall reaction is written as:
\[\ce{H2SO4 + NaSO3 ->Na2SO4 + SO2 ++ H2O}\]
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Evaporation of water is a physical change. True or false ?
What are the characteristics of a chemical reaction ? A chemical reaction is characterised by an irreversible change in which a new substance is formed.
Write a short note on the information derived from a balanced chemical equation.
Choose the correct option from the bracket and explain the statement giving reason.
(Oxidation, displacement, electrolysis, reduction, zinc, copper, double displacement, decomposition)
To prevent rusting, a layer of ______ metal is applied on iron sheets.
Complete the statement by filling the gaps using 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)
Rusting of iron is a ______ chemical change.
Show with the help of diagram of electronic configuration how the following compound is formed from the constituent atoms.
Water
What do you observe when Cl2 is passed through potassium iodide (KI) solution.
Differentiate between the following:
Neutralization reaction and a precipitation reaction.
Photosynthesis is a chemical reaction that takes place in the presence of ______.
Write the characteristics of chemical change.
