Advertisements
Advertisements
प्रश्न
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Heat energy
उत्तर
Heat Energy:
On heating the reactants – the reacting particles, collide swiftly and with greater intensity.
Example:
Heat on zinc carbonate:
\[\ce{ZnCO3 ->[\triangle] ZmO + CO2 [g]}\]
APPEARS IN
संबंधित प्रश्न
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are products.
Convey the following information in the form of a balanced chemical equation:
"An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution."
Substitute formulae for names and balance the following equation:
Calcium carbonate reacts with hydrochloric acid to produce calcium chloride, water and carbon dioxide gas.
Write word equation for the following skeletal equation:
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Balance the following equation:
PbS + O2 → PbO + SO2
Balance the following equation:
KOH + Cl2 → KCl + KClO + H2O
Write word equation for the following molecular equation:
CaO + H20 → Ca (OH)2 + Δ
Word equation:
State why [+ Δ ] is not written in the reaction, if ZnO reacts with H2O.
Give a balanced equation for addition of iron to copper [II] sulphate solution. State the change in colour seen.
Representation of the results of a chemical change – is a chemical equation.
For the equation: FeCl3 + 3NH4OH 3NH4Cl + Fe(OH)3 ↓
Answer the following:
Write the word equation for the above molecular equation.
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
NaOH + CO2 → Na2CO3 + H2O