Question

answer the questions plz
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Answer 1

1. Endothermic

$mg \: + o_{2} = mgo$

2. Exothermic

3. Endothermic

4. Exothermic

5. Endothermic

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Answer 2

$\bf\huge{Answer :}$

1. $\bf{ Mg + O_2 \longrightarrow MgO}$

• Exothermic reaction.

2. $\bf{HCL+NaOH \longrightarrow H_2O + Heat}$

• Endothermic Reaction

3. $\bf{2KClO_3 \: (aq) \longrightarrow 2KCl\: (s) + 3O_2}$

• Endothermic Reaction

4. $\bf{CaO + H_2O\longrightarrow Ca(OH)_2 + Heat}$

• Exothermic Reaction

5. $\bf{CaCO_3\: (s) \longrightarrow CaO\: (s) + CO_2 }$

• Endothermic Reaction

$\bf\huge{ Additional\: information :}$

Chemical reaction: It is a process in which one or more reactants react to form a new product is called a chemical reaction.

Types of Chemical reactions:

• Combination reaction
• Decomposition reaction
• Displacement reaction
• Redox reaction (Oxidation and reduction reactions)
• Exothermic and Endothermic Reactions.

There are some important characteristics of chemical reactions. They are :

• Evolution of a gas.
• Change in color.
• Change in the state.
• Change in temperature.
• Formation of a precipitate.