Advertisements
Advertisements
Question
What is wrong with the following chemical equation?
\[\ce{Mg + O -> MgO}\]
Correct and balance it.
Advertisements
Solution
In this reaction, oxygen is written as O, but it is a diatomic molecule, and it is stable; its formula is O2.
The correct balanced chemical equation is:
\[\ce{2MgO -> 2Mg + O2}\]
APPEARS IN
RELATED QUESTIONS
Balance the following chemical equation:
MnO2 + HCI → MnCI2 + CI2 + H2O
Is Photosynthesis an endothermic reaction or an exothermic reaction?
You are given the solution of lead nitrate. In order to obtain a yellow precipitate you should mix with it a solution of:
(a) potassium chloride
(b) potassium nitride
(c) potassium sulphide
(d) potassium iodide
What happens when silver nitrate solution is added to sodium chloride solution?
Write the equation for the reaction which takes place.
A white precipitate can be obtained by adding dilute sulphuric acid to:
(a) CuSO4 solution
(b) Nacl solution
(c) BaCl2 solution
(d) Na2SO4 solution
Write word equation for the following skeletal equation:
\[\ce{Zn + HCl -> ZnCl2 + H2}\]
Balance the following equation. Also name the product formed.
`"KCIO"_3 → "KCI" +"O"_2`
Balance the following equation. Also name the product formed.
PbCO3 → PbO +CO2
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
Write the answer to the following.
Explain the similarity and difference in two events, namely adding NaOH to water and adding CaO to water.
Write the balanced chemical equation of the following reaction.
barium chloride + sulphuric acid → barium sulphate + hydrochloric acid
\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]
0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of salt formed.
In certain reaction a change of state is observed i.e. solid to liquid, liquid to gas etc. – State the change of state of the products – to give the respective reactant.
\[\ce{C +2S -> CS2}\]
Give an example of a chemical equation in which two reactants form:
four product
\[\ce{2KClO3->[MnO2] 2KCl + 3O2[g] - is a balanced equation.}\]
State why the compound MnO2 is written above the arrow.
Balance the following simple equation:
N2 + O2 ⇌ NO
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
C2H5OH + 3O2 → 2CO2 + 2H2O
Writing a chemical reaction in brief by using chemical formulae is called as _______.
Write the skeleton equation for the following word equation and then balance them.
- Carbon + Oxygen → Carbon dioxide.
- Phosphorus + Chlorine → Phosphorus pentachloride.
- Sulphur + Oxygen → Sulphur dioxide.
- Magnesium + hydrogen → Magnesium + Hydrogen chloride chloride.
What are the steps involved in writing the skeletal equation?
