Classify each chemical reaction tvpe of reaction check all that a reaction combi

Question

Classify each chemical reaction tvpe of reaction check all that a reaction combination single replacement double replacement acid-bas decomposition combination single replacemen double replaceme decomposition combination single replacement combustio double replacement decomposition combination single replacement double replacement add-base decomposition CaCO3(s) ? CaO(s) + CO2 (g) recipitation mbusti 4 Na(s) + O2(g) ? 2Na20(s) CH,OCH3 (I) +302(g) 2CO2(g) + 3H20(g) precipitation combustion KOH (aq) + HC10, (ag) ? KC104 (aq)-H2O(1) l Don't Know Submit

Explanation / Answer

1. First is decomposition reaction, that is, limestone (CaCO3) breaks down or decomposes into calcium oxide (CaO) and carbondioxide (CO2) on heating.

2. Second is redox reaction in which the sodium gets oxidised from 0 to +1 state and oxygen gets reduced from 0 to -2 state.

4 Na 0 + O20   -------> 2 Na2 1O -2

3. Third is combustion reaction. It is a type of reaction where molecular O2 is involved. The reaction is exothermic. giving carbondioxide and water as products.

4. Fourth is double replacement reaction where two reactant ionic compounds exchange ions to form two new products. It is of the type-

AB + CD ---------> AD + CB

where A= K

B= OH

C= H

D= ClO4

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