Advertisements
Advertisements
प्रश्न
A metal X forms a salt XSO4. The salt XSO4 forms a clear solution in water which reacts with sodium hydroxide solution to form a blue precipitate Y. Metal X is used in making electric wire and alloys like brass.
(a) What do you think metal X could be?
(b) Write the name, formula and colour of salt XSO4.
(c) What is the blue precipitate Y?
(d) Write a chemical equation of the reaction which takes place when salt XSO4 reacts with sodium hydroxide solution. Give the state symbols of all the reactants and products which occur in the above equation.
उत्तर
(a) Metal X could be copper (Cu).
(b) The salt XSO4 is copper sulphate; its formula is CuSO4 and it is blue in colour.
(c) Copper hydroxide [Cu(OH)2] is the blue precipitate.
(d) CuSO4 (aq) + 2NaOH (aq) → Cu(OH)2 (s) + Na2SO4 (aq)
APPEARS IN
संबंधित प्रश्न
How will you indicate a solution made in water in a chemical equation?
Balance the given equation:
Fe + O2 
Fe2O3
Balance the following equation and add state symbols:
Zn + HCI → ZnCI2 + H2
Write symbolic representation for the following word equation and balance them :
Calcium carbonate → Calcium oxide + Carbon dioxide.
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
What do the following symbol stand for?
2H2
Balance the following equation:
Fe2O3 + CO → Fe + CO2
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Write the word equation for the above molecular equation.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Cl2 + 2H2O + SO2 → 4HCl + H2SO4
