Advertisements
Advertisements
प्रश्न
Ammonia reacts with oxygen to form nitrogen and water. Write a balanced chemical equation for this reaction. Add the state symbols for all the reactants and products.
Advertisements
उत्तर
\[\ce{4NH3_{(g)} + 3O2_{(g)} -> 2N2_{(g)} + 6H2O_{(l)}}\]
APPEARS IN
संबंधित प्रश्न
Balance the following equations:
\[\ce{Al(OH)3 -> Al2O3 + H2O}\]
Balance the following equation:
\[\ce{BaCl2 + H2SO4 -> BaSO4 + H2O}\]
What is meant by a chemical reaction? Explain with the help of an example.
The chemical reaction between quicklime and water is characterised by:
(a) evolution of hydrogen gas
(b) formation of slaked lime precipitate
(c) change in temperature of mixture
(d) change in colour of the product
Name the various types of chemical reactions.
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 down what you understood from the following chemical reaction.
AgNO3(aq) + NaCI(aq) → AgCI ↓ + NaNO3(aq)
Show the formation of Na2O by the transfer of electrons.
Balance the following equation:
Fe + H2O → Fe3O4 + H2
Match column A with column B.
| Column A | Column B |
| (a) Blue salt changes to white and then black | (i) Ammonium dichromate |
| (b) Orange coloured compound changes to green. | (ii) Iodine |
| (c) Red compound changes to brown and then yellow. | (iii) Zinc Nitrate |
| (d) White to yellow when hot and white when cold. | (iv) Copper sulphate |
| (e) Violet solid changes to violet vapours. | (v) Red Lead |
Choose the correct alternative and rewrite the following sentence.
Which of the following is not required to find the pH of a given solution?
When a potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed.
Write the balanced chemical equation for this reaction.
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 – copper carbonate.
Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Pressure
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State why the compound MnO2 is written above the arrow.
Balance the following simple equation:
H2 + Cl2 → HCl
Balance the following simple equation:
KHCO3 → K2CO3 + H2O + CO2
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
Na2SO3 + HCl → 2NaCl + H2O + SO2
Dil. HCl is added to Zn granules. How will you prove that chemical change has taken place here? Support your response with two arguments.
