Advertisements
Advertisements
प्रश्न
In certain reaction an insoluble solid called precipitate is formed. State the colour and name of the precipitate formed in the following reaction involving addition of:
Lead nitrate to ammonium hydroxide.?
उत्तर
Lead nitrate and ammonium hydroxde
\[\ce{Pb(NO3)2 + 2NH4OH -> 2NH4NO3 +\underset{\text{Lead hydroxide}}{Pb(OH)2↓}}\]
The precipitate formed is Lead hydroxide which is chalky white in colour.
APPEARS IN
संबंधित प्रश्न
Write the balanced equations for the following reaction, and add the state symbols:
Magnesium carbonate reacts with hydrochloric acid to produce magnesium chloride, carbon dioxide and water.
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.
A white precipitate will be formed if we add common salt solution to:
(a) Ba(NO3)2 solution
(b) KNO3 solution
(c) AgNO3 solution
(d) Mg(NO3)2 solution
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Catalyst
An element X is trivalent. Write the balanced equation for the combustion of X in oxygen.
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
Give a reason why the above equation is balanced.
Balance the following simple equation:
K + CO2 → K2O + C
Balance the following simple equation:
\[\ce{Ca(OH)2 + HNO3 -> Ca(NO3)2 + H2O}\]
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
Write scientific reason.
Adding zinc particles to a solution of copper sulphate makes the blue solution colorless.
