Advertisements
Advertisements
Question
Balance the following chemical equation.
- Na + O2 → Na2O3
- Ca + N2 → Ca3N2
- N2 + H2 →NH3
- CaCO3 +HCl → CaCl2 + CO2 +H2O
- Pb(NO3)2 → PbO + NO2 + O2
Advertisements
Solution
- 4Na + O2 → 2Na2O
- 3Ca + N2 → Ca3N2
- N2 + 3H2 → 2NH3
- CaCO2 + 2HCl → CaCl2 + H2O + CO2
- 2Pb (NO3)2 → 2PbO + 4NO2 + O2
APPEARS IN
RELATED QUESTIONS
What is wrong with the following chemical equation?
Mg + O → MgO
Correct and balance it.
Translate the following statement into chemical equation and then balance the equation:
Aluminium metal replaces iron from ferric oxide, Fe2O3, giving aluminium oxide and iron.
Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.
Explain the following reaction with one suitable example .
Decomposition reaction
Balance the following chemical equation :
H2 + O2 → H2O
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
A chemical reaction is generally accompanied by certain external indications or characteristics. These include – change of – (a) colour (b) state (c) smell (d) evolution of gas (e) formation of precipitate (f) evolution or absorption of heat. With reference to change of colour – state the change in colour seen when the following are heated – zinc carbonate.
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.?
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Name the reactants and the products in the above equation.
Balance the following simple equation:
H2 + O2 → H2O
