Advertisements
Advertisements
Question
What is the limitation of the reaction given in question 2?
Solution
The chemical equation given in question 2 does not give the time taken for the completion of the reaction.
Also, it does not give information about whether heat is absorbed or evolved during the reaction.
APPEARS IN
RELATED QUESTIONS
Giving examples, state the difference between balanced and unbalanced chemical equations.
Rewrite the following information in the form of a balanced chemical equation:
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.
Balance the following equation. Also name the product formed.
`"KCIO"_3 → "KCI" +"O"_2`
Balance the following equation. Also name the product formed.
`"Zn" + "HCI" → "ZnCI" _2 + "H"_2`
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.
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 – zinc carbonate.
Balance the following simple equation:
KHCO3 → K2CO3 + H2O + CO2
Balance the following simple equation:
Ca + H2O → Ca(OH)2 + H2
Balance the following simple equation:
H2 + O2 → H2O
Why should a magnesium ribbon be cleaned before burning in air?