Question

5.
Classify the following reactions into different types, giving reason.
(a) CaO(s) + SiO2(g)
Casio,(s)
(b) KOH(aq) + HCl(aq)
KCl(aq) + H,O(1)
(c) Cu(s) + 2AgNO,(aq)
→ Cu(NO),(aq) + 2Ag(s)
beat
(d) BaCO,(s) ""; Ba0(s) + CO,(g)​

Answer 1

Explanation:

For a: The reaction is combination reaction.

For b: The reaction is neutralization reaction.

For c: The reaction is single displacement reaction.

For d: The reaction is decomposition reaction.

Explanation:

For a:

A combination reaction is a type of chemical reaction in which two or more substances join together to form a single molecule. General equation for this reaction is:

A+B\rightarrow ABA+B→AB

So, CaO+SiO_2\rightarrow CaSiO_3CaO+SiO

2

→CaSiO

3

is an example of combination reaction.

For b:

A neutralization reaction is a type of chemical reaction in which an acid reacts with a base to produce a salt ans water molecule. General equation for this reaction is:

HX+BOH\rightarrow BX+H_2OHX+BOH→BX+H

2

O

So, KOH+HCl\rightarrow KCl+H_2OKOH+HCl→KCl+H

2

O is an example of neutralization reaction.

For c:

A single displacement reaction is a type of chemical reaction in which a more reactive metal displaces a less reactive metal from its chemical reaction. General equation for this reaction is:

A+BC\rightarrow AC+BA+BC→AC+B

where, A is more reactive than B.

So, Cu+2AgNO_3\rightarrow Cu(NO_3)_2+2AgCu+2AgNO

3

→Cu(NO

3

)

2

+2Ag is an example of single displacement reaction.

For d:

Decomposition reaction is a type of chemical reaction in which a single molecule breaks down into two or more molecules. General equation for this reaction is:

AB\rightarrow A+BAB→A+B

So, BaCO_3\rightarrow BaO+CO_2BaCO

3

→BaO+CO

2

is an example of decomposition reaction.