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
Write the balanced chemical equation for the following reaction.
\[\ce{Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride}\]
Fill in the following blank with suitable word:
A solution made in water is known as an ........... solution and indicated by the symbol ...........
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
When potassium nitrate is heated, it decomposes into potassium nitrite and oxygen. Write a balanced equation for this reaction and add the state symbols of the reactants and products.
Write your observation for the following chemical reaction and name the product formed :
When manganese dioxide is added to potassium chlorate and heated.
Write symbolic representation for the following word equation and balance them :
Calcium oxide + Water → Calcium hydroxide
Balance the following equation. Also name the product formed.
CO2 + C → CO
Complete the following equation:
CH2 + H5OH `("Hot Conc." H_2SO_4)/`>
Write down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Balance the following equation:
Pb3O4 + HCl → PbCl2 + H2O + Cl2
When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.
What is the colour of this precipitate? Name the compound precipitated.
Give word equation for the following chemical reaction and give the names of the product formed.
ZnCO3 → ZnO + CO2
Give word equation for the following chemical reaction and give the names of the product formed.
NH3 + HCl→ NH4Cl
Balance the following simple equation:
Mg + N2 → Mg3N2
Give a balanced equation by partial equation method, [steps are given below].
The reaction of excess ammonia with chlorine – Ammonia as a reducing agent
- Ammonia first reacts with chlorine to give hydrogen chloride and nitrogen.
- Hydrogen chloride then further reacts with excess ammonia to give ammonium chloride.
Which of the following statements about the given reaction are correct?
`3"Fe"("s") + 4"H"_2"O"("g") -> "Fe"_3"O"_4("s") + 4"H"_2("g")`
- Iron metal is getting oxidised
- Water is getting reduced
- Water is acting as reducing agent
- Water is acting as oxidising agent
A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
Complete the following blank in the equation as indicated.
\[\ce{CaH2_{(s)} + 2H2O_{( aq)}-> Ca(OH)2_{(s)} + 2H2_{(g)}}\]
Molecules: 6.02 × 1023 + ______ `→` ______ + ______
