Q18 of 152 Page 45

Balance the following chemical equations:

(a)


(b)

(a)

Ferrous sulphate decomposed to ferric oxide, Sulphur dioxide and Sulphur trioxide.


(b) 2Pb(NO3)2(s) 2PbO (s) + 4NO2 (g) + O2 (g)


Lead (II) nitrate decomposes into lead mono oxide, nitrogen dioxide and oxygen gas.



More from this chapter

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16 What type of chemical reactions take place when:

(a) a magnesium wire is burnt in air?


(b) lime-stone is heated?


(c) silver bromide is exposed to sunlight


(d) electricity is passed through water?


(e)ammonia and hydrogen chloride are mixed?

 17 What type of chemical reactions are represented by the following equations?

(i) A + BCAC + B


(ii) A + B C


(iii) X Y + Z


(iv) PQ + RS PS + RQ


(v) A203 + 2B B203 + 2A

 19 Which of the following is a combination and which is a displacement reaction?

(a)


(b)

20 What type of reactions are represented by the following equations?

(a)


(b)


(c)


(d)


(e)