Question

What is an oxidation reaction? Give one example of oxidation Reaction.
04. Give an example of a decomposition reaction. Describe any activity to illustrate such a
reaction by heating,
OS. Why is respiration considered as exothermic process?
06. Balance the following chemical equation.
(KClO3 - KCl+O2
(H2SO4+NaOH-Na2SO4+ H2O

(IV)Na2Co3+ HCI-> Nacl NaHCO3
v

(V)Mg +N2 -> Mg3N2,

(vi)Fe + H2O -> Fe3O4+ H2
(vii)MnO2 + Al-> Mn + AL2O3,

(Vill)Si2H6+H2O - Si(OH)4+H2
(x)NH3 + O2 > NO + H2O
(x)B4H10+ 02-> B203+ H2O
07. On what basis is a chemical equation balanced?

08. State any two observations in an activity suggesting the occurrence of a chemical reaction
09. What change in colour is observed when silver chloride is left exposed to sunlight? Also
mention the type of chemical reaction.
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Answer 1

Explanation:

(vi)Fe + H2O -> Fe3O4+ H2

(vii)MnO2 + Al-> Mn + AL2O3,

(Vill)Si2H6+H2O - Si(OH)4+H2

(x)NH3