Question

(a) Potassium chlorate (KClO3) on heating forms potassium chloride and oxygen. Write a balanced equation for this reaction and indicate the evolution of gas.
(b) Rewrite the following information in the form of a balanced chemical equation
Magnesium burns in carbon dioxide to form magnesium oxide and carbon.

Answer 1

(a) Balanced chemical reaction:

$\bold{2 K C l O_{3(s)} \stackrel{\Delta\left(M n O_{2}\right)}{\longrightarrow} 2 K C l_{(s)}+3 O_{2(g)}}$

• The Potassium chlorate in presence of heat undergoes decomposition to form potassium chloride and oxygen gas which is evolved.
• This reaction takes place in the presence of manganese dioxide as a catalyst.
• This is a decomposition reaction as single reactant is decomposed to form two products.

(b) Balanced chemical reaction:

$\bold{2 M g_{(s)}+C O_{2(g)} \rightarrow 2 M g O_{(s)}+C_{(s)}}$

• Magnesium oxide is the major product formed in the above reaction.
• This a combustion (magnesium burns) and oxidation (oxide of magnesium is released) reaction.
• This reaction is used in carbon dioxide fire extinguishers.

You can get all the answers of Chapter 1 in the link below:

https://brainly.in/question/13848082

Few questions related to this chapter:

(a) What is meant by chemical reaction? Explain with the help of an example.

(b) Give one example each of a chemical reaction characterised by

(i) evolution of a gas

(ii) change in colour

(iii) formation of a precipitate

(iv) change in temperature

(v) change in state.

https://brainly.in/question/13629277

Translate the following statement into chemical equation and then balance it

Barium chloride solution reacts with aluminium sulphate solution to form a precipitate of barium sulphate and aluminium chloride solution.

https://brainly.in/question/13629279

Answer 2

Balanced Equation is Reactants = Products

Explanation:

a.) Potassium chlorate ($KClO_3$) on heating forms potassium chloride and oxygen can be written in the equation form as -

*Needs to be done in the presence of Heat and Manganese dioxide

$2KClO_3 (s) --> 2KCl (s) + 3O_2$ (g)

b.) Magnesium burns in carbon dioxide to form magnesium oxide and carbon can be represented in the balanced equation as -  

$2Mg (s) + CO_2 (g) --> 2MgO (s)+ C(s)$