Advertisements
Advertisements
प्रश्न
On what basis is a chemical equation balanced?
Advertisements
उत्तर
A chemical equation is balanced based on the law of conservation of mass; it states that "matter can neither be created nor be destroyed". If the number of atoms of various elements are different on the reactants' and products' side, it means they are either destroyed or created, which violates the law of conservation of mass.
संबंधित प्रश्न
Balance the given equation:
Fe + O2 
Fe2O3
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.
State one characteristic of the chemical reaction which takes place when lemon juice is added gradually to potassium permanganate solution.
The removal of oxygen from a substance is called:
(a) oxidation
(b) corrosion
(c) reduction
(d) rancidity
Balance the following chemical equation :
H2 + O2 → H2O
Write your observation for the following chemical reaction and name the product formed :
When dilute acetic acid is poured on baking soda.
Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:
Write the balanced chemical equation of the following reaction.
copper + nitric acid → copper nitrate + nitric oxide + water
Write the balanced chemical equation of the following reaction.
barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
Write the balanced chemical equation of the following reaction.
aluminium + sodium hydroxide + water → sodium meta aluminate + hydrogen
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
Identify the type of reaction taking place of the following case and write the balanced chemical equation of the reaction:
Potassium iodide reacts with lead nitrate to produce potassium nitrate and lead iodide.
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:
Iron [III] chloride to ammonium hydroxide.
Give word equation for the following chemical reaction and give the names of the product formed.
Zn + 2HC1→ ZnCl2 + H2
Give an example of a chemical equation in which two reactants form:
four product
Balance the following simple equation:
SO2 + O2 ⇌ SO3
Balance the following simple equation:
CaO + HCl → CaCl2 + H2O
Write a balanced equation for the following word equation:
Calcium hydroxide + Ammonium chloride → Calcium chloride + Water + Ammonia
What are the steps involved in writing the skeletal equation?
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Grams: 42 g + ______ `→` ______ + ______
