Advertisements
Advertisements
Question
State one characteristic of the chemical reaction which takes place when wax is burned in the form of a candle?
Advertisements
Solution
When wax (solid) is burnt in the form of candle, it produces water (liquid) and carbon dioxide (gas). Hence, this reaction is characterised by change in state.
APPEARS IN
RELATED QUESTIONS
State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.
Complete and balance the following equation:
NaOH + ............ 
Na2 SO4 + H2O
Balance the given chemical equation:
C + CO2 → CO
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
State one characteristic of the chemical reaction which takes place when quicklime is treated with water
What do you understand by exothermic reactions?
Balance the following chemical equation:
Write your observation for the following chemical reaction and name the product formed :
When an aqueous solution of sodium chloride is mixed with an aqueous solution of silver nitrate.
Write symbolic representation for the following word equation and balance them :
Carbon + Oxygen → Carbon dioxide.
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:
Balance the following equation:
MnO2 + HCl → MnCl2 + H2O + Cl2
Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.
Light energy
Name the following:
Two gases which react under pressure in presence of a catalyst at elevated temperatures to give a gaseous product.
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
CaCO3 + 2HCl[dil.] → CaCl2 + H2O + CO2 [g]
State the information provided by the above chemical equation.
Write a balanced equation for the following word equation:
Iron + Hydrochloric acid → Iron [II] chloride + Hydrogen
Write a balanced equation for the following word equation:
Lead dioxide [lead (IV) oxide] → Lead monoxide + Oxygen
Give a balanced equation by the partial equation method, [steps are given below].
Oxidation of Lead [II] Sulphide by Ozone
- Ozone first decomposes to give molecular oxygen & nascent oxygen.
- Nascent oxygen then oxidises lead [II] sulphide to lead [II] sulphate.
Reema took 5ml of Lead Nitrate solution in a beaker and added approximately 4ml of Potassium Iodide solution to it. What would she observe?
Which of the following is not a physical change?
