The reaction  represents which among the following reactions.

1. Synthesis
2. Precipitation
3. Neutralization
4. Displacement
5. Decomposition

(vi)     What type of chemical reaction is represented by the equation 

Zn(s) + 2HCl(aq)  + H₂(g)?

A      Displacement reaction

B      Combination reaction

C      Precipitation reaction

D      Decomposition reaction

E       Redox reaction

(iii) A rapid chemical reaction that releases energy in form of light and heat is called 

1.  combustion.
2.  decomposition.
3.  displacement. 
4.  neutralization.
5.  precipitation.

Complete the following equations and determine the type of chemical reaction involved in each case.

(i)  Zn(s) + H2SO4( aq) ?

(ii)  AgNO₃₍ aq₎ + NaCl₍ aq₎ ^?              

(iii)  N2(g) + H2(g) ?    

Give the name of the type of reaction represented by each of the following chemical equations.

 State and describe the type of reaction in the following chemical equations: 

 (i) Fe(s) + CuSO4(aq) à FeSO4(aq) + Cu(s).

 (ii) Na2SO4(aq) + BaCl2(aq) à BaSO4(s) + 2NaCl(aq).

7. (a) Briefly explain five importance of balancing chemical equations.

(b) Give a balanced chemical equation for the reaction between sodium carbonate and hydrochloric acid. (7 marks)

Classify the following reactions into oxidation and reduction reactions.

(i)  S( s) + O 2( g) ? SO 2( g)

(ii) N2( g) + 3H 2( g) ? 2NH 3( g)

(iii) Fe2+ (aq) ­ e ­  ? Fe3+ (aq)

(iv) Fe³⁺ _(aq) ­ e  ^­  ? Fe²⁺ _(aq)  (4 marks)