मराठी

What is wrong with the following chemical equation? Mg + O -> MgO Correct and balance it.

Advertisements
Advertisements

प्रश्न

What is wrong with the following chemical equation?

\[\ce{Mg + O -> MgO}\]

Correct and balance it.

रासायनिक समीकरणे/रचना
लघु उत्तर
Advertisements

उत्तर

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:

\[\ce{2MgO -> 2Mg + O2}\]

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 1: Chemical Reactions and Equations - Exercise 1 [पृष्ठ २८]

APPEARS IN

लखमीर सिंह Chemistry Part 2 [English] Class 10
पाठ 1 Chemical Reactions and Equations
Exercise 1 | Q 6. | पृष्ठ २८

व्हिडिओ ट्यूटोरियलVIEW ALL [4]

संबंधित प्रश्‍न

Balance the following equation:

\[\ce{H2O2 -> H2O + O2}\]


What do you understand by endothermic reactions?


Give one example of an exothermic reaction.


Write symbolic representation for the following word equation and balance them :

Iron + Sulphur → Iron sulphide.


Raisins are wiped off gently before final weighing with the help of


Balance the equation stepwise.

NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + H2O(l)


What is the valency of :

carbon in CH4


Write the balanced chemical equation of the following reaction.

barium chloride + sulphuric acid → barium sulphate + hydrochloric acid


Write the balanced chemical equation of the following reaction.

iron pyrites(FeS2) + oxygen → ferric oxide + sulphur dioxide


Write the balanced chemical equation of the following reaction.

potassium dichromate + hydrochloric acid → Potassium chloride + chromium chloride + water + chlorine


Write the balanced chemical equation of the following reaction.

sulphur + nitric acid→ sulphuric acid  + nitrogen dioxide + water.


\[\ce{MnO2 + 4HCl -> MnCl2 + 2H2O + Cl2}\]

0.02 moles of pure MnO2 is heated strongly with conc. HCl. Calculate moles of chlorine gas formed.


Write word equation for the following molecular equation:

CuCo3 → CuO + CO2 [g]

Word equation:

State the characteristics or indications occurring in the above reaction.


Write word equation for the following molecular equation:

FeSO4 + 2NaOH →Na2SO4 + Fe(OH)2 ↓

Word equation:

State why [↓] indication is seen after Fe(OH)2 and not after Na2SO4


Write word equation for the following molecular equation:

\[\ce{H2 [g] + Cl2 [g] ->[sunlight] 2HCl}\]

Word equation:

State which form of energy is utilised in the above chemical reaction.


Give one example in the case where supplying energy [given below] is necessary for a chemical reaction.

Catalyst


Give an example of a chemical equation in which two reactants form:

three product


Balance the following simple equation:

KHCO3 →  K2CO3   +    H2O   +   CO2


A dilute ferrous sulphate solution is gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?


Give the characteristic tests for the following gases :

  1. CO2
  2. SO2
  3. O2
  4. H2

Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×